./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5506d4c7458a400c41a33af3f6404f1e04b9f2e97e99f1fb53b74acf6bf59baf --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 18:24:18,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 18:24:18,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 18:24:18,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 18:24:18,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 18:24:18,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 18:24:18,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 18:24:18,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 18:24:18,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 18:24:18,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 18:24:18,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 18:24:18,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 18:24:18,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 18:24:18,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 18:24:18,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 18:24:18,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 18:24:18,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 18:24:18,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 18:24:18,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 18:24:18,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 18:24:18,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 18:24:18,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 18:24:18,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 18:24:18,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 18:24:18,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 18:24:18,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 18:24:18,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 18:24:18,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 18:24:18,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 18:24:18,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 18:24:18,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 18:24:18,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 18:24:18,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 18:24:18,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 18:24:18,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 18:24:18,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 18:24:18,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 18:24:18,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 18:24:18,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 18:24:18,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 18:24:18,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 18:24:18,816 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 18:24:18,838 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 18:24:18,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 18:24:18,839 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 18:24:18,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 18:24:18,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 18:24:18,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 18:24:18,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 18:24:18,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 18:24:18,840 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 18:24:18,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 18:24:18,841 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 18:24:18,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 18:24:18,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 18:24:18,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 18:24:18,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 18:24:18,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 18:24:18,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 18:24:18,842 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 18:24:18,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 18:24:18,842 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 18:24:18,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 18:24:18,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 18:24:18,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 18:24:18,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 18:24:18,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 18:24:18,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 18:24:18,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 18:24:18,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 18:24:18,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 18:24:18,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 18:24:18,844 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 18:24:18,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 18:24:18,844 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 18:24:18,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 18:24:18,845 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 18:24:18,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5506d4c7458a400c41a33af3f6404f1e04b9f2e97e99f1fb53b74acf6bf59baf [2023-02-18 18:24:19,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 18:24:19,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 18:24:19,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 18:24:19,061 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 18:24:19,061 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 18:24:19,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.c [2023-02-18 18:24:20,091 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 18:24:20,233 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 18:24:20,234 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.c [2023-02-18 18:24:20,240 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80fac679/846a160ab1464ba6881cd9dd2a5c24c4/FLAGf037a30d6 [2023-02-18 18:24:20,250 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80fac679/846a160ab1464ba6881cd9dd2a5c24c4 [2023-02-18 18:24:20,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 18:24:20,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 18:24:20,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 18:24:20,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 18:24:20,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 18:24:20,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de13088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20, skipping insertion in model container [2023-02-18 18:24:20,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 18:24:20,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 18:24:20,387 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.c[526,539] [2023-02-18 18:24:20,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 18:24:20,412 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 18:24:20,423 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.c[526,539] [2023-02-18 18:24:20,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 18:24:20,442 INFO L208 MainTranslator]: Completed translation [2023-02-18 18:24:20,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20 WrapperNode [2023-02-18 18:24:20,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 18:24:20,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 18:24:20,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 18:24:20,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 18:24:20,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,469 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-02-18 18:24:20,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 18:24:20,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 18:24:20,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 18:24:20,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 18:24:20,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,498 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 18:24:20,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 18:24:20,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 18:24:20,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 18:24:20,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20" (1/1) ... [2023-02-18 18:24:20,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 18:24:20,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:20,527 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) [2023-02-18 18:24:20,533 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 [2023-02-18 18:24:20,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 18:24:20,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 18:24:20,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 18:24:20,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 18:24:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 18:24:20,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 18:24:20,607 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 18:24:20,608 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 18:24:20,747 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 18:24:20,754 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 18:24:20,754 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 18:24:20,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 06:24:20 BoogieIcfgContainer [2023-02-18 18:24:20,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 18:24:20,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 18:24:20,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 18:24:20,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 18:24:20,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 06:24:20" (1/3) ... [2023-02-18 18:24:20,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7820dc85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 06:24:20, skipping insertion in model container [2023-02-18 18:24:20,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:24:20" (2/3) ... [2023-02-18 18:24:20,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7820dc85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 06:24:20, skipping insertion in model container [2023-02-18 18:24:20,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 06:24:20" (3/3) ... [2023-02-18 18:24:20,789 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound50.c [2023-02-18 18:24:20,806 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 18:24:20,806 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 18:24:20,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 18:24:20,880 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;@45385b99, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 18:24:20,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 18:24:20,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 18:24:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 18:24:20,888 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:20,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:20,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:20,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:20,894 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2023-02-18 18:24:20,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:20,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155690199] [2023-02-18 18:24:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:20,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:20,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:20,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155690199] [2023-02-18 18:24:20,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 18:24:21,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721046928] [2023-02-18 18:24:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:21,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:21,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:21,003 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) [2023-02-18 18:24:21,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 18:24:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:21,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 18:24:21,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:24:21,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:24:21,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721046928] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:24:21,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:24:21,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 18:24:21,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633811821] [2023-02-18 18:24:21,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:24:21,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 18:24:21,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:21,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 18:24:21,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 18:24:21,132 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:24:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:21,149 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2023-02-18 18:24:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 18:24:21,151 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 18:24:21,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:21,155 INFO L225 Difference]: With dead ends: 50 [2023-02-18 18:24:21,155 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 18:24:21,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 18:24:21,160 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:21,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:24:21,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 18:24:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-18 18:24:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:24:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2023-02-18 18:24:21,189 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2023-02-18 18:24:21,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:21,190 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2023-02-18 18:24:21,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:24:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2023-02-18 18:24:21,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 18:24:21,190 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:21,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:21,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 18:24:21,396 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 [2023-02-18 18:24:21,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:21,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:21,397 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2023-02-18 18:24:21,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:21,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005075909] [2023-02-18 18:24:21,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:21,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:24:21,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:21,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005075909] [2023-02-18 18:24:21,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005075909] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:24:21,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:24:21,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:24:21,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754121717] [2023-02-18 18:24:21,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:24:21,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:24:21,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:21,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:24:21,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:24:21,527 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:24:21,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:21,582 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2023-02-18 18:24:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 18:24:21,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 18:24:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:21,584 INFO L225 Difference]: With dead ends: 36 [2023-02-18 18:24:21,584 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 18:24:21,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 18:24:21,585 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:21,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:24:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 18:24:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2023-02-18 18:24:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:24:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2023-02-18 18:24:21,596 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2023-02-18 18:24:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:21,598 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2023-02-18 18:24:21,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:24:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2023-02-18 18:24:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 18:24:21,599 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:21,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:21,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 18:24:21,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:21,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:21,600 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2023-02-18 18:24:21,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:21,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442017374] [2023-02-18 18:24:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:21,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:21,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:21,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442017374] [2023-02-18 18:24:21,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 18:24:21,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049666650] [2023-02-18 18:24:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:21,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:21,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:21,617 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) [2023-02-18 18:24:21,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 18:24:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:21,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 18:24:21,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:24:21,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:24:21,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049666650] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:24:21,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:24:21,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 18:24:21,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822060569] [2023-02-18 18:24:21,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:24:21,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 18:24:21,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:21,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 18:24:21,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 18:24:21,715 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:24:21,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:21,726 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2023-02-18 18:24:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 18:24:21,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 18:24:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:21,727 INFO L225 Difference]: With dead ends: 42 [2023-02-18 18:24:21,727 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 18:24:21,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 18:24:21,728 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:21,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:24:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 18:24:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-18 18:24:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:24:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-18 18:24:21,733 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-18 18:24:21,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:21,733 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-18 18:24:21,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:24:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-18 18:24:21,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 18:24:21,734 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:21,734 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:21,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:21,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-18 18:24:21,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:21,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:21,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2023-02-18 18:24:21,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:21,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590673187] [2023-02-18 18:24:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:21,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:21,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-18 18:24:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:24:22,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:22,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590673187] [2023-02-18 18:24:22,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590673187] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:24:22,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:24:22,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:24:22,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605257482] [2023-02-18 18:24:22,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:24:22,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:24:22,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:24:22,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:24:22,005 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 18:24:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:22,048 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-18 18:24:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 18:24:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-18 18:24:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:22,049 INFO L225 Difference]: With dead ends: 42 [2023-02-18 18:24:22,049 INFO L226 Difference]: Without dead ends: 40 [2023-02-18 18:24:22,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 18:24:22,051 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:22,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:24:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-18 18:24:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-02-18 18:24:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:24:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-18 18:24:22,072 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2023-02-18 18:24:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:22,072 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-18 18:24:22,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 18:24:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-18 18:24:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 18:24:22,075 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:22,076 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:22,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 18:24:22,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:22,077 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2023-02-18 18:24:22,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:22,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42013465] [2023-02-18 18:24:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:22,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:22,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:22,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080947376] [2023-02-18 18:24:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:22,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:22,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:22,105 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) [2023-02-18 18:24:22,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 18:24:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:22,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 18:24:22,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 18:24:22,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 18:24:22,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:22,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42013465] [2023-02-18 18:24:22,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:22,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080947376] [2023-02-18 18:24:22,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080947376] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:22,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:22,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-18 18:24:22,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971198638] [2023-02-18 18:24:22,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:22,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 18:24:22,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 18:24:22,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-18 18:24:22,365 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 18:24:22,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:22,564 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2023-02-18 18:24:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 18:24:22,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2023-02-18 18:24:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:22,567 INFO L225 Difference]: With dead ends: 71 [2023-02-18 18:24:22,567 INFO L226 Difference]: Without dead ends: 56 [2023-02-18 18:24:22,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-18 18:24:22,568 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:22,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 82 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:24:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-18 18:24:22,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2023-02-18 18:24:22,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 18:24:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2023-02-18 18:24:22,586 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2023-02-18 18:24:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:22,586 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2023-02-18 18:24:22,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 18:24:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2023-02-18 18:24:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 18:24:22,587 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:22,588 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:22,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:22,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:22,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:22,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2023-02-18 18:24:22,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:22,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957009270] [2023-02-18 18:24:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:22,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:22,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628706509] [2023-02-18 18:24:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:22,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:22,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:22,810 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) [2023-02-18 18:24:22,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 18:24:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:22,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 18:24:22,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 18:24:22,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 18:24:22,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:22,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957009270] [2023-02-18 18:24:22,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:22,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628706509] [2023-02-18 18:24:22,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628706509] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:22,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:22,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-18 18:24:22,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889383982] [2023-02-18 18:24:22,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:22,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 18:24:22,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:22,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 18:24:22,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-18 18:24:22,958 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 18:24:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:23,090 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2023-02-18 18:24:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 18:24:23,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2023-02-18 18:24:23,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:23,092 INFO L225 Difference]: With dead ends: 73 [2023-02-18 18:24:23,092 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 18:24:23,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-18 18:24:23,093 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:23,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 81 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:24:23,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 18:24:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2023-02-18 18:24:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 43 states have internal predecessors, (50), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 18:24:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2023-02-18 18:24:23,102 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 26 [2023-02-18 18:24:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:23,102 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2023-02-18 18:24:23,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 18:24:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2023-02-18 18:24:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 18:24:23,103 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:23,103 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:23,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:23,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:23,308 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:23,309 INFO L85 PathProgramCache]: Analyzing trace with hash 847666457, now seen corresponding path program 1 times [2023-02-18 18:24:23,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:23,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248381482] [2023-02-18 18:24:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:23,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:23,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:23,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354382440] [2023-02-18 18:24:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:23,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:23,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:23,317 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) [2023-02-18 18:24:23,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 18:24:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:23,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 18:24:23,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 18:24:23,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 18:24:23,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:23,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248381482] [2023-02-18 18:24:23,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:23,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354382440] [2023-02-18 18:24:23,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354382440] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:23,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:23,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 18:24:23,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663518372] [2023-02-18 18:24:23,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:23,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 18:24:23,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:23,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 18:24:23,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 18:24:23,391 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 18:24:23,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:23,470 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2023-02-18 18:24:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 18:24:23,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2023-02-18 18:24:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:23,474 INFO L225 Difference]: With dead ends: 165 [2023-02-18 18:24:23,474 INFO L226 Difference]: Without dead ends: 127 [2023-02-18 18:24:23,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-18 18:24:23,477 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:23,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 137 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:24:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-18 18:24:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2023-02-18 18:24:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 83 states have internal predecessors, (94), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 18:24:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2023-02-18 18:24:23,492 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 33 [2023-02-18 18:24:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:23,493 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2023-02-18 18:24:23,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 18:24:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2023-02-18 18:24:23,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 18:24:23,494 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:23,494 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:23,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:23,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:23,699 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2023-02-18 18:24:23,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:23,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397854831] [2023-02-18 18:24:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:23,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:23,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:23,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146995942] [2023-02-18 18:24:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:23,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:23,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:23,712 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) [2023-02-18 18:24:23,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 18:24:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:23,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 18:24:23,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 18:24:23,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-18 18:24:23,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:23,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397854831] [2023-02-18 18:24:23,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:23,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146995942] [2023-02-18 18:24:23,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146995942] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:23,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:23,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-18 18:24:23,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148787326] [2023-02-18 18:24:23,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:23,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 18:24:23,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:23,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 18:24:23,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 18:24:23,811 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 18:24:23,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:23,937 INFO L93 Difference]: Finished difference Result 249 states and 307 transitions. [2023-02-18 18:24:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 18:24:23,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2023-02-18 18:24:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:23,945 INFO L225 Difference]: With dead ends: 249 [2023-02-18 18:24:23,945 INFO L226 Difference]: Without dead ends: 228 [2023-02-18 18:24:23,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-18 18:24:23,948 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:23,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 261 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:24:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-18 18:24:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2023-02-18 18:24:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 155 states have internal predecessors, (172), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2023-02-18 18:24:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 270 transitions. [2023-02-18 18:24:23,985 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 270 transitions. Word has length 49 [2023-02-18 18:24:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:23,986 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 270 transitions. [2023-02-18 18:24:23,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 18:24:23,986 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 270 transitions. [2023-02-18 18:24:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-18 18:24:23,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:23,987 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:23,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:24,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:24,195 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2023-02-18 18:24:24,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:24,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596235868] [2023-02-18 18:24:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:24,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:24,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:24,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350433273] [2023-02-18 18:24:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:24,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:24,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:24,212 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) [2023-02-18 18:24:24,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 18:24:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:24,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-18 18:24:24,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-18 18:24:24,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-18 18:24:24,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:24,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596235868] [2023-02-18 18:24:24,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:24,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350433273] [2023-02-18 18:24:24,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350433273] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:24,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:24,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-02-18 18:24:24,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491638651] [2023-02-18 18:24:24,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:24,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 18:24:24,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:24,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 18:24:24,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-18 18:24:24,468 INFO L87 Difference]: Start difference. First operand 221 states and 270 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-18 18:24:25,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:25,714 INFO L93 Difference]: Finished difference Result 372 states and 479 transitions. [2023-02-18 18:24:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 18:24:25,721 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 58 [2023-02-18 18:24:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:25,723 INFO L225 Difference]: With dead ends: 372 [2023-02-18 18:24:25,723 INFO L226 Difference]: Without dead ends: 299 [2023-02-18 18:24:25,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-02-18 18:24:25,724 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:25,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 131 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 18:24:25,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-02-18 18:24:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 272. [2023-02-18 18:24:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.2258064516129032) internal successors, (228), 194 states have internal predecessors, (228), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-18 18:24:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2023-02-18 18:24:25,763 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 58 [2023-02-18 18:24:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:25,763 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2023-02-18 18:24:25,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-18 18:24:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2023-02-18 18:24:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-18 18:24:25,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:25,769 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:25,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:25,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:25,977 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2023-02-18 18:24:25,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:25,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287071487] [2023-02-18 18:24:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:25,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:25,983 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:25,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439145295] [2023-02-18 18:24:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:25,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:25,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:25,985 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) [2023-02-18 18:24:25,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 18:24:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:26,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-18 18:24:26,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-18 18:24:26,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-18 18:24:26,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:26,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287071487] [2023-02-18 18:24:26,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:26,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439145295] [2023-02-18 18:24:26,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439145295] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:26,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:26,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-18 18:24:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763889640] [2023-02-18 18:24:26,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:26,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 18:24:26,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:26,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 18:24:26,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-18 18:24:26,258 INFO L87 Difference]: Start difference. First operand 272 states and 338 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-18 18:24:26,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:26,981 INFO L93 Difference]: Finished difference Result 341 states and 423 transitions. [2023-02-18 18:24:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 18:24:26,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 69 [2023-02-18 18:24:26,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:26,982 INFO L225 Difference]: With dead ends: 341 [2023-02-18 18:24:26,982 INFO L226 Difference]: Without dead ends: 260 [2023-02-18 18:24:26,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-02-18 18:24:26,983 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:26,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 137 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 18:24:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-18 18:24:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2023-02-18 18:24:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 165 states have internal predecessors, (190), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-18 18:24:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2023-02-18 18:24:27,012 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 69 [2023-02-18 18:24:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:27,012 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2023-02-18 18:24:27,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-18 18:24:27,016 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2023-02-18 18:24:27,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-18 18:24:27,019 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:27,019 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:27,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:27,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 18:24:27,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:27,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:27,226 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2023-02-18 18:24:27,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:27,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472493979] [2023-02-18 18:24:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:27,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:27,243 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:27,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035457902] [2023-02-18 18:24:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:27,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:27,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:27,245 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) [2023-02-18 18:24:27,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 18:24:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:27,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 18:24:27,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-18 18:24:27,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-18 18:24:27,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:27,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472493979] [2023-02-18 18:24:27,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:27,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035457902] [2023-02-18 18:24:27,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035457902] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:27,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:27,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-18 18:24:27,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465915725] [2023-02-18 18:24:27,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:27,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 18:24:27,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 18:24:27,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-18 18:24:27,406 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-18 18:24:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:27,595 INFO L93 Difference]: Finished difference Result 263 states and 312 transitions. [2023-02-18 18:24:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 18:24:27,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 74 [2023-02-18 18:24:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:27,598 INFO L225 Difference]: With dead ends: 263 [2023-02-18 18:24:27,599 INFO L226 Difference]: Without dead ends: 218 [2023-02-18 18:24:27,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-18 18:24:27,600 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 17 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:27,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 267 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:24:27,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-18 18:24:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2023-02-18 18:24:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 147 states have internal predecessors, (166), 40 states have call successors, (40), 25 states have call predecessors, (40), 25 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-18 18:24:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 245 transitions. [2023-02-18 18:24:27,627 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 245 transitions. Word has length 74 [2023-02-18 18:24:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:27,627 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 245 transitions. [2023-02-18 18:24:27,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-18 18:24:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 245 transitions. [2023-02-18 18:24:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-18 18:24:27,629 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:27,629 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-18 18:24:27,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:27,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:27,834 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:27,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:27,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2023-02-18 18:24:27,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:27,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663048510] [2023-02-18 18:24:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:27,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:27,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:27,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998734064] [2023-02-18 18:24:27,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:24:27,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:27,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:27,841 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) [2023-02-18 18:24:27,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 18:24:27,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:24:27,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:24:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-18 18:24:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-18 18:24:27,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-18 18:24:31,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663048510] [2023-02-18 18:24:31,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998734064] [2023-02-18 18:24:31,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998734064] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:31,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:31,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-02-18 18:24:31,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547218396] [2023-02-18 18:24:31,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:31,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 18:24:31,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:31,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 18:24:31,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-02-18 18:24:31,396 INFO L87 Difference]: Start difference. First operand 210 states and 245 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-18 18:24:35,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:24:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:42,919 INFO L93 Difference]: Finished difference Result 309 states and 397 transitions. [2023-02-18 18:24:42,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 18:24:42,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 90 [2023-02-18 18:24:42,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:42,921 INFO L225 Difference]: With dead ends: 309 [2023-02-18 18:24:42,921 INFO L226 Difference]: Without dead ends: 259 [2023-02-18 18:24:42,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=151, Invalid=550, Unknown=1, NotChecked=0, Total=702 [2023-02-18 18:24:42,922 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 118 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:42,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 331 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-02-18 18:24:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-18 18:24:43,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 246. [2023-02-18 18:24:43,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 166 states have (on average 1.2048192771084338) internal successors, (200), 174 states have internal predecessors, (200), 53 states have call successors, (53), 26 states have call predecessors, (53), 26 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2023-02-18 18:24:43,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 305 transitions. [2023-02-18 18:24:43,025 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 305 transitions. Word has length 90 [2023-02-18 18:24:43,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:43,025 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 305 transitions. [2023-02-18 18:24:43,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-18 18:24:43,025 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 305 transitions. [2023-02-18 18:24:43,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-18 18:24:43,026 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:43,026 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:43,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:43,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 18:24:43,234 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:43,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2023-02-18 18:24:43,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:43,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417620008] [2023-02-18 18:24:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:43,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:43,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:43,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143717822] [2023-02-18 18:24:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:43,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:43,248 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) [2023-02-18 18:24:43,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 18:24:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:43,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 18:24:43,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 18:24:43,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-02-18 18:24:43,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:43,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417620008] [2023-02-18 18:24:43,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:43,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143717822] [2023-02-18 18:24:43,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143717822] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:43,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:43,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 18:24:43,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098709735] [2023-02-18 18:24:43,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:43,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 18:24:43,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:43,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 18:24:43,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 18:24:43,354 INFO L87 Difference]: Start difference. First operand 246 states and 305 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-18 18:24:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:43,827 INFO L93 Difference]: Finished difference Result 703 states and 939 transitions. [2023-02-18 18:24:43,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 18:24:43,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 96 [2023-02-18 18:24:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:43,831 INFO L225 Difference]: With dead ends: 703 [2023-02-18 18:24:43,831 INFO L226 Difference]: Without dead ends: 628 [2023-02-18 18:24:43,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-18 18:24:43,832 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 160 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:43,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 297 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:24:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-02-18 18:24:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 543. [2023-02-18 18:24:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 360 states have (on average 1.2805555555555554) internal successors, (461), 386 states have internal predecessors, (461), 130 states have call successors, (130), 52 states have call predecessors, (130), 52 states have return successors, (127), 104 states have call predecessors, (127), 127 states have call successors, (127) [2023-02-18 18:24:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 718 transitions. [2023-02-18 18:24:44,089 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 718 transitions. Word has length 96 [2023-02-18 18:24:44,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:44,090 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 718 transitions. [2023-02-18 18:24:44,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-18 18:24:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 718 transitions. [2023-02-18 18:24:44,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-18 18:24:44,091 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:44,091 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:44,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-18 18:24:44,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 18:24:44,297 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:44,297 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2023-02-18 18:24:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:44,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084401330] [2023-02-18 18:24:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:44,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:44,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:44,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114889132] [2023-02-18 18:24:44,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:24:44,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:44,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:44,305 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) [2023-02-18 18:24:44,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 18:24:44,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:24:44,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:24:44,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 18:24:44,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-18 18:24:44,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-18 18:24:45,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:45,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084401330] [2023-02-18 18:24:45,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:45,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114889132] [2023-02-18 18:24:45,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114889132] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:45,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:45,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-02-18 18:24:45,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878719322] [2023-02-18 18:24:45,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:45,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 18:24:45,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:45,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 18:24:45,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-02-18 18:24:45,096 INFO L87 Difference]: Start difference. First operand 543 states and 718 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-18 18:24:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:49,501 INFO L93 Difference]: Finished difference Result 674 states and 887 transitions. [2023-02-18 18:24:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 18:24:49,502 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 101 [2023-02-18 18:24:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:49,504 INFO L225 Difference]: With dead ends: 674 [2023-02-18 18:24:49,504 INFO L226 Difference]: Without dead ends: 546 [2023-02-18 18:24:49,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 176 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2023-02-18 18:24:49,505 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:49,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 235 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-02-18 18:24:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-02-18 18:24:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 498. [2023-02-18 18:24:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 330 states have (on average 1.2333333333333334) internal successors, (407), 352 states have internal predecessors, (407), 114 states have call successors, (114), 53 states have call predecessors, (114), 53 states have return successors, (111), 92 states have call predecessors, (111), 111 states have call successors, (111) [2023-02-18 18:24:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 632 transitions. [2023-02-18 18:24:49,725 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 632 transitions. Word has length 101 [2023-02-18 18:24:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:49,726 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 632 transitions. [2023-02-18 18:24:49,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-18 18:24:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 632 transitions. [2023-02-18 18:24:49,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-18 18:24:49,727 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:49,727 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:49,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:49,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 18:24:49,932 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:49,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1246855822, now seen corresponding path program 1 times [2023-02-18 18:24:49,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:49,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271837195] [2023-02-18 18:24:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:49,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:49,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:49,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577734953] [2023-02-18 18:24:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:49,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:49,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:49,942 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) [2023-02-18 18:24:49,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 18:24:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:50,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 18:24:50,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-18 18:24:50,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-18 18:24:50,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:50,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271837195] [2023-02-18 18:24:50,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:50,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577734953] [2023-02-18 18:24:50,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577734953] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:50,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:50,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-18 18:24:50,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326789243] [2023-02-18 18:24:50,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:50,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 18:24:50,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:50,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 18:24:50,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-18 18:24:50,109 INFO L87 Difference]: Start difference. First operand 498 states and 632 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-18 18:24:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:50,764 INFO L93 Difference]: Finished difference Result 986 states and 1288 transitions. [2023-02-18 18:24:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 18:24:50,765 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 104 [2023-02-18 18:24:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:50,768 INFO L225 Difference]: With dead ends: 986 [2023-02-18 18:24:50,768 INFO L226 Difference]: Without dead ends: 947 [2023-02-18 18:24:50,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-02-18 18:24:50,769 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 249 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:50,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 377 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:24:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-02-18 18:24:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 922. [2023-02-18 18:24:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 610 states have (on average 1.1704918032786886) internal successors, (714), 654 states have internal predecessors, (714), 223 states have call successors, (223), 89 states have call predecessors, (223), 88 states have return successors, (215), 178 states have call predecessors, (215), 215 states have call successors, (215) [2023-02-18 18:24:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1152 transitions. [2023-02-18 18:24:51,160 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1152 transitions. Word has length 104 [2023-02-18 18:24:51,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:51,160 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1152 transitions. [2023-02-18 18:24:51,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-18 18:24:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1152 transitions. [2023-02-18 18:24:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-18 18:24:51,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:51,162 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:51,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:51,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 18:24:51,370 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:51,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:51,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1040094269, now seen corresponding path program 2 times [2023-02-18 18:24:51,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:51,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525595016] [2023-02-18 18:24:51,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:51,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:51,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:51,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96966669] [2023-02-18 18:24:51,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:24:51,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:51,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:51,401 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) [2023-02-18 18:24:51,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 18:24:51,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:24:51,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:24:51,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-18 18:24:51,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-18 18:24:51,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-18 18:24:51,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:51,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525595016] [2023-02-18 18:24:51,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:51,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96966669] [2023-02-18 18:24:51,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96966669] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:51,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:51,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-02-18 18:24:51,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480433411] [2023-02-18 18:24:51,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:51,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 18:24:51,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 18:24:51,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-02-18 18:24:51,909 INFO L87 Difference]: Start difference. First operand 922 states and 1152 transitions. Second operand has 18 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-18 18:24:52,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:52,996 INFO L93 Difference]: Finished difference Result 1139 states and 1407 transitions. [2023-02-18 18:24:52,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 18:24:52,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 106 [2023-02-18 18:24:52,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:53,000 INFO L225 Difference]: With dead ends: 1139 [2023-02-18 18:24:53,001 INFO L226 Difference]: Without dead ends: 834 [2023-02-18 18:24:53,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-02-18 18:24:53,002 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:53,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 243 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 18:24:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-02-18 18:24:53,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 826. [2023-02-18 18:24:53,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 551 states have (on average 1.1506352087114338) internal successors, (634), 589 states have internal predecessors, (634), 197 states have call successors, (197), 77 states have call predecessors, (197), 77 states have return successors, (189), 159 states have call predecessors, (189), 189 states have call successors, (189) [2023-02-18 18:24:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1020 transitions. [2023-02-18 18:24:53,326 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1020 transitions. Word has length 106 [2023-02-18 18:24:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:53,326 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1020 transitions. [2023-02-18 18:24:53,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-18 18:24:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1020 transitions. [2023-02-18 18:24:53,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-02-18 18:24:53,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:53,328 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-02-18 18:24:53,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:53,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:53,533 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2023-02-18 18:24:53,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:53,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786767506] [2023-02-18 18:24:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:53,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:53,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:53,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725449967] [2023-02-18 18:24:53,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 18:24:53,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:53,546 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) [2023-02-18 18:24:53,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 18:24:53,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 18:24:53,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:24:53,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 18:24:53,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 159 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-02-18 18:24:53,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:56,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:56,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786767506] [2023-02-18 18:24:56,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:56,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725449967] [2023-02-18 18:24:56,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725449967] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 18:24:56,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 18:24:56,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-18 18:24:56,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429154719] [2023-02-18 18:24:56,293 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:56,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 18:24:56,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:56,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 18:24:56,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=169, Unknown=1, NotChecked=0, Total=210 [2023-02-18 18:24:56,294 INFO L87 Difference]: Start difference. First operand 826 states and 1020 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-18 18:24:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:56,729 INFO L93 Difference]: Finished difference Result 857 states and 1050 transitions. [2023-02-18 18:24:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 18:24:56,729 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 122 [2023-02-18 18:24:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:56,732 INFO L225 Difference]: With dead ends: 857 [2023-02-18 18:24:56,732 INFO L226 Difference]: Without dead ends: 843 [2023-02-18 18:24:56,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=63, Invalid=242, Unknown=1, NotChecked=0, Total=306 [2023-02-18 18:24:56,733 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:56,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 66 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:24:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2023-02-18 18:24:57,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 827. [2023-02-18 18:24:57,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 556 states have (on average 1.1384892086330936) internal successors, (633), 588 states have internal predecessors, (633), 192 states have call successors, (192), 79 states have call predecessors, (192), 78 states have return successors, (189), 159 states have call predecessors, (189), 189 states have call successors, (189) [2023-02-18 18:24:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1014 transitions. [2023-02-18 18:24:57,055 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1014 transitions. Word has length 122 [2023-02-18 18:24:57,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:57,055 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1014 transitions. [2023-02-18 18:24:57,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-18 18:24:57,055 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1014 transitions. [2023-02-18 18:24:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-18 18:24:57,056 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:57,057 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:57,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:57,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 18:24:57,262 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1989463840, now seen corresponding path program 3 times [2023-02-18 18:24:57,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:57,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376579162] [2023-02-18 18:24:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:57,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:57,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:57,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2190446] [2023-02-18 18:24:57,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 18:24:57,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:57,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:57,269 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) [2023-02-18 18:24:57,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 18:24:57,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 18:24:57,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:24:57,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-18 18:24:57,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-02-18 18:24:57,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-18 18:24:57,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:57,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376579162] [2023-02-18 18:24:57,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:57,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2190446] [2023-02-18 18:24:57,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2190446] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:57,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:57,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-02-18 18:24:57,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952164630] [2023-02-18 18:24:57,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:57,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 18:24:57,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:57,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 18:24:57,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-18 18:24:57,436 INFO L87 Difference]: Start difference. First operand 827 states and 1014 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-18 18:24:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:24:57,956 INFO L93 Difference]: Finished difference Result 834 states and 1020 transitions. [2023-02-18 18:24:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 18:24:57,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 133 [2023-02-18 18:24:57,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:24:57,959 INFO L225 Difference]: With dead ends: 834 [2023-02-18 18:24:57,959 INFO L226 Difference]: Without dead ends: 824 [2023-02-18 18:24:57,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 250 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-02-18 18:24:57,960 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:24:57,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 104 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:24:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2023-02-18 18:24:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 525. [2023-02-18 18:24:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 352 states have (on average 1.1107954545454546) internal successors, (391), 371 states have internal predecessors, (391), 109 states have call successors, (109), 63 states have call predecessors, (109), 63 states have return successors, (108), 90 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-18 18:24:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 608 transitions. [2023-02-18 18:24:58,256 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 608 transitions. Word has length 133 [2023-02-18 18:24:58,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:24:58,257 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 608 transitions. [2023-02-18 18:24:58,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-18 18:24:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 608 transitions. [2023-02-18 18:24:58,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-02-18 18:24:58,259 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:24:58,259 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:24:58,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 18:24:58,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 18:24:58,464 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:24:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:24:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash 888958317, now seen corresponding path program 1 times [2023-02-18 18:24:58,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:24:58,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605872829] [2023-02-18 18:24:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:58,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:24:58,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:24:58,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153611738] [2023-02-18 18:24:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:24:58,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:24:58,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:24:58,476 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) [2023-02-18 18:24:58,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 18:24:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:24:58,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 18:24:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:24:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 2222 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-18 18:24:58,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:24:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2023-02-18 18:24:58,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:24:58,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605872829] [2023-02-18 18:24:58,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:24:58,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153611738] [2023-02-18 18:24:58,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153611738] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:24:58,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:24:58,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2023-02-18 18:24:58,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080815727] [2023-02-18 18:24:58,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:24:58,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 18:24:58,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:24:58,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 18:24:58,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 18:24:58,915 INFO L87 Difference]: Start difference. First operand 525 states and 608 transitions. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 29 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 28 states have call predecessors, (64), 28 states have call successors, (64) [2023-02-18 18:25:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:25:00,498 INFO L93 Difference]: Finished difference Result 1259 states and 1550 transitions. [2023-02-18 18:25:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-18 18:25:00,499 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 29 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 28 states have call predecessors, (64), 28 states have call successors, (64) Word has length 220 [2023-02-18 18:25:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:25:00,504 INFO L225 Difference]: With dead ends: 1259 [2023-02-18 18:25:00,504 INFO L226 Difference]: Without dead ends: 1246 [2023-02-18 18:25:00,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1212, Invalid=2210, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 18:25:00,506 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 604 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 18:25:00,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 813 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 18:25:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2023-02-18 18:25:01,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1245. [2023-02-18 18:25:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 832 states have (on average 1.1237980769230769) internal successors, (935), 883 states have internal predecessors, (935), 269 states have call successors, (269), 143 states have call predecessors, (269), 143 states have return successors, (268), 218 states have call predecessors, (268), 268 states have call successors, (268) [2023-02-18 18:25:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1472 transitions. [2023-02-18 18:25:01,265 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1472 transitions. Word has length 220 [2023-02-18 18:25:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:25:01,266 INFO L495 AbstractCegarLoop]: Abstraction has 1245 states and 1472 transitions. [2023-02-18 18:25:01,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 29 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 28 states have call predecessors, (64), 28 states have call successors, (64) [2023-02-18 18:25:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1472 transitions. [2023-02-18 18:25:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-02-18 18:25:01,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:25:01,271 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 27, 26, 26, 26, 26, 26, 26, 26, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:25:01,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 18:25:01,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:25:01,478 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:25:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:25:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1525085741, now seen corresponding path program 2 times [2023-02-18 18:25:01,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:25:01,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288857054] [2023-02-18 18:25:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:25:01,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:25:01,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:25:01,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013090533] [2023-02-18 18:25:01,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:25:01,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:25:01,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:25:01,492 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) [2023-02-18 18:25:01,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 18:25:01,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:25:01,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:25:01,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-18 18:25:01,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:25:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 9950 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2023-02-18 18:25:02,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:25:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 2038 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-02-18 18:25:02,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:25:02,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288857054] [2023-02-18 18:25:02,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:25:02,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013090533] [2023-02-18 18:25:02,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013090533] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:25:02,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:25:02,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 54 [2023-02-18 18:25:02,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351237175] [2023-02-18 18:25:02,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:25:02,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 18:25:02,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:25:02,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 18:25:02,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 18:25:02,734 INFO L87 Difference]: Start difference. First operand 1245 states and 1472 transitions. Second operand has 54 states, 54 states have (on average 5.703703703703703) internal successors, (308), 54 states have internal predecessors, (308), 50 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 49 states have call predecessors, (128), 49 states have call successors, (128) [2023-02-18 18:25:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:25:06,110 INFO L93 Difference]: Finished difference Result 2159 states and 2646 transitions. [2023-02-18 18:25:06,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-18 18:25:06,111 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.703703703703703) internal successors, (308), 54 states have internal predecessors, (308), 50 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 49 states have call predecessors, (128), 49 states have call successors, (128) Word has length 444 [2023-02-18 18:25:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:25:06,117 INFO L225 Difference]: With dead ends: 2159 [2023-02-18 18:25:06,117 INFO L226 Difference]: Without dead ends: 2146 [2023-02-18 18:25:06,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 822 SyntacticMatches, 12 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3518, Invalid=6184, Unknown=0, NotChecked=0, Total=9702 [2023-02-18 18:25:06,120 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 1236 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:25:06,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 1047 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1129 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 18:25:06,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2023-02-18 18:25:07,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 2145. [2023-02-18 18:25:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 1432 states have (on average 1.1277932960893855) internal successors, (1615), 1523 states have internal predecessors, (1615), 469 states have call successors, (469), 243 states have call predecessors, (469), 243 states have return successors, (468), 378 states have call predecessors, (468), 468 states have call successors, (468) [2023-02-18 18:25:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 2552 transitions. [2023-02-18 18:25:07,648 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 2552 transitions. Word has length 444 [2023-02-18 18:25:07,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:25:07,649 INFO L495 AbstractCegarLoop]: Abstraction has 2145 states and 2552 transitions. [2023-02-18 18:25:07,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.703703703703703) internal successors, (308), 54 states have internal predecessors, (308), 50 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 49 states have call predecessors, (128), 49 states have call successors, (128) [2023-02-18 18:25:07,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 2552 transitions. [2023-02-18 18:25:07,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-02-18 18:25:07,660 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:25:07,660 INFO L195 NwaCegarLoop]: trace histogram [105, 104, 104, 47, 46, 46, 46, 46, 46, 46, 46, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:25:07,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 18:25:07,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:25:07,867 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:25:07,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:25:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash -554493667, now seen corresponding path program 3 times [2023-02-18 18:25:07,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:25:07,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413447494] [2023-02-18 18:25:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:25:07,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:25:07,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:25:07,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134071747] [2023-02-18 18:25:07,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 18:25:07,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:25:07,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:25:07,899 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) [2023-02-18 18:25:07,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 18:25:18,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2023-02-18 18:25:18,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:25:18,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 18:25:18,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:25:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 27970 backedges. 7737 proven. 69 refuted. 0 times theorem prover too weak. 20164 trivial. 0 not checked. [2023-02-18 18:25:18,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:25:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 27970 backedges. 1185 proven. 69 refuted. 0 times theorem prover too weak. 26716 trivial. 0 not checked. [2023-02-18 18:25:19,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:25:19,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413447494] [2023-02-18 18:25:19,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:25:19,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134071747] [2023-02-18 18:25:19,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134071747] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:25:19,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:25:19,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2023-02-18 18:25:19,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121915626] [2023-02-18 18:25:19,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:25:19,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 18:25:19,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:25:19,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 18:25:19,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-18 18:25:19,412 INFO L87 Difference]: Start difference. First operand 2145 states and 2552 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 11 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2023-02-18 18:25:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:25:21,023 INFO L93 Difference]: Finished difference Result 3159 states and 3793 transitions. [2023-02-18 18:25:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 18:25:21,024 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 11 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) Word has length 724 [2023-02-18 18:25:21,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:25:21,029 INFO L225 Difference]: With dead ends: 3159 [2023-02-18 18:25:21,029 INFO L226 Difference]: Without dead ends: 2118 [2023-02-18 18:25:21,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1446 GetRequests, 1432 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-18 18:25:21,031 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 13 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 18:25:21,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 295 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 18:25:21,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2023-02-18 18:25:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 2118. [2023-02-18 18:25:22,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 1414 states have (on average 1.1272984441301273) internal successors, (1594), 1503 states have internal predecessors, (1594), 462 states have call successors, (462), 241 states have call predecessors, (462), 241 states have return successors, (461), 373 states have call predecessors, (461), 461 states have call successors, (461) [2023-02-18 18:25:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2517 transitions. [2023-02-18 18:25:22,332 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2517 transitions. Word has length 724 [2023-02-18 18:25:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:25:22,333 INFO L495 AbstractCegarLoop]: Abstraction has 2118 states and 2517 transitions. [2023-02-18 18:25:22,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 11 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2023-02-18 18:25:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2517 transitions. [2023-02-18 18:25:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2023-02-18 18:25:22,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:25:22,341 INFO L195 NwaCegarLoop]: trace histogram [106, 105, 105, 46, 45, 45, 45, 45, 45, 45, 45, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:25:22,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 18:25:22,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:25:22,551 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:25:22,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:25:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1342293370, now seen corresponding path program 4 times [2023-02-18 18:25:22,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:25:22,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212057548] [2023-02-18 18:25:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:25:22,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:25:22,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:25:22,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724668880] [2023-02-18 18:25:22,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 18:25:22,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:25:22,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:25:22,569 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) [2023-02-18 18:25:22,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process