./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.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/hard-ll_unwindbound10.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 c8cdca66dc863bfa94d37a0903946c6b89240a08b13e8fd34226289180db2a40 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 17:59:41,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 17:59:41,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 17:59:42,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 17:59:42,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 17:59:42,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 17:59:42,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 17:59:42,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 17:59:42,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 17:59:42,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 17:59:42,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 17:59:42,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 17:59:42,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 17:59:42,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 17:59:42,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 17:59:42,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 17:59:42,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 17:59:42,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 17:59:42,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 17:59:42,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 17:59:42,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 17:59:42,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 17:59:42,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 17:59:42,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 17:59:42,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 17:59:42,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 17:59:42,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 17:59:42,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 17:59:42,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 17:59:42,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 17:59:42,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 17:59:42,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 17:59:42,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 17:59:42,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 17:59:42,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 17:59:42,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 17:59:42,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 17:59:42,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 17:59:42,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 17:59:42,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 17:59:42,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 17:59:42,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 17:59:42,105 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 17:59:42,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 17:59:42,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 17:59:42,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 17:59:42,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 17:59:42,107 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 17:59:42,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 17:59:42,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 17:59:42,107 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 17:59:42,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 17:59:42,107 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 17:59:42,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 17:59:42,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 17:59:42,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 17:59:42,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 17:59:42,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 17:59:42,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 17:59:42,108 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 17:59:42,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 17:59:42,108 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 17:59:42,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 17:59:42,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 17:59:42,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 17:59:42,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 17:59:42,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:59:42,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 17:59:42,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 17:59:42,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 17:59:42,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 17:59:42,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 17:59:42,110 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 17:59:42,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 17:59:42,110 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 17:59:42,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 17:59:42,110 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 17:59:42,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8cdca66dc863bfa94d37a0903946c6b89240a08b13e8fd34226289180db2a40 [2023-02-18 17:59:42,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 17:59:42,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 17:59:42,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 17:59:42,359 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 17:59:42,360 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 17:59:42,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c [2023-02-18 17:59:43,399 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 17:59:43,638 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 17:59:43,638 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c [2023-02-18 17:59:43,645 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61653edc2/0104b0c056af46c596420af54c75936a/FLAG5a9891ff3 [2023-02-18 17:59:43,658 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61653edc2/0104b0c056af46c596420af54c75936a [2023-02-18 17:59:43,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 17:59:43,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 17:59:43,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 17:59:43,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 17:59:43,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 17:59:43,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43625252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43, skipping insertion in model container [2023-02-18 17:59:43,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 17:59:43,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 17:59:43,834 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/hard-ll_unwindbound10.c[538,551] [2023-02-18 17:59:43,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:59:43,863 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 17:59:43,875 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/hard-ll_unwindbound10.c[538,551] [2023-02-18 17:59:43,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:59:43,904 INFO L208 MainTranslator]: Completed translation [2023-02-18 17:59:43,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43 WrapperNode [2023-02-18 17:59:43,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 17:59:43,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 17:59:43,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 17:59:43,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 17:59:43,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,934 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-18 17:59:43,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 17:59:43,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 17:59:43,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 17:59:43,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 17:59:43,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,969 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 17:59:43,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 17:59:43,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 17:59:43,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 17:59:43,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43" (1/1) ... [2023-02-18 17:59:43,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:59:43,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:59:44,001 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 17:59:44,021 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 17:59:44,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 17:59:44,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 17:59:44,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 17:59:44,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 17:59:44,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 17:59:44,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 17:59:44,091 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 17:59:44,092 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 17:59:44,221 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 17:59:44,237 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 17:59:44,237 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 17:59:44,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:59:44 BoogieIcfgContainer [2023-02-18 17:59:44,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 17:59:44,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 17:59:44,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 17:59:44,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 17:59:44,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 05:59:43" (1/3) ... [2023-02-18 17:59:44,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46010ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:59:44, skipping insertion in model container [2023-02-18 17:59:44,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:59:43" (2/3) ... [2023-02-18 17:59:44,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46010ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:59:44, skipping insertion in model container [2023-02-18 17:59:44,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:59:44" (3/3) ... [2023-02-18 17:59:44,265 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound10.c [2023-02-18 17:59:44,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 17:59:44,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 17:59:44,332 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 17:59:44,337 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;@265ab250, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 17:59:44,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 17:59:44,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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 17:59:44,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 17:59:44,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:59:44,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:59:44,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:59:44,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:59:44,352 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2023-02-18 17:59:44,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:59:44,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079694077] [2023-02-18 17:59:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:44,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:59:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:44,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:59:44,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079694077] [2023-02-18 17:59:44,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 17:59:44,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36310710] [2023-02-18 17:59:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:44,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:59:44,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:59:44,457 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 17:59:44,485 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 17:59:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:44,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 17:59:44,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:59:44,547 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 17:59:44,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:59:44,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36310710] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:59:44,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:59:44,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 17:59:44,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747302611] [2023-02-18 17:59:44,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:59:44,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 17:59:44,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:59:44,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 17:59:44,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 17:59:44,585 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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 4.5) internal successors, (9), 2 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 17:59:44,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:59:44,601 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2023-02-18 17:59:44,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 17:59:44,603 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 17:59:44,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:59:44,608 INFO L225 Difference]: With dead ends: 53 [2023-02-18 17:59:44,609 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 17:59:44,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 17:59:44,614 INFO L413 NwaCegarLoop]: 38 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, 38 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 17:59:44,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:59:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 17:59:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-18 17:59:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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 17:59:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2023-02-18 17:59:44,640 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2023-02-18 17:59:44,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:59:44,641 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2023-02-18 17:59:44,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 17:59:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2023-02-18 17:59:44,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 17:59:44,642 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:59:44,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:59:44,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 17:59:44,849 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 17:59:44,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:59:44,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:59:44,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2023-02-18 17:59:44,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:59:44,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271061477] [2023-02-18 17:59:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:59:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:44,964 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 17:59:44,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:59:44,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271061477] [2023-02-18 17:59:44,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271061477] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:59:44,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:59:44,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 17:59:44,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306928944] [2023-02-18 17:59:44,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:59:44,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:59:44,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:59:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:59:44,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:59:44,968 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 17:59:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:59:45,026 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2023-02-18 17:59:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:59:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 17:59:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:59:45,028 INFO L225 Difference]: With dead ends: 38 [2023-02-18 17:59:45,028 INFO L226 Difference]: Without dead ends: 36 [2023-02-18 17:59:45,029 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 17:59:45,030 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:59:45,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:59:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-18 17:59:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2023-02-18 17:59:45,038 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 17:59:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-18 17:59:45,040 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-18 17:59:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:59:45,040 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-18 17:59:45,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 17:59:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-18 17:59:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 17:59:45,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:59:45,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:59:45,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 17:59:45,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:59:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:59:45,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2023-02-18 17:59:45,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:59:45,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166459233] [2023-02-18 17:59:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:45,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:59:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:45,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:59:45,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166459233] [2023-02-18 17:59:45,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 17:59:45,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053653366] [2023-02-18 17:59:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:45,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:59:45,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:59:45,063 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 17:59:45,077 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 17:59:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:45,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 17:59:45,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:59:45,145 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 17:59:45,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:59:45,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053653366] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:59:45,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:59:45,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 17:59:45,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824301495] [2023-02-18 17:59:45,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:59:45,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 17:59:45,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:59:45,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 17:59:45,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 17:59:45,148 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 17:59:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:59:45,164 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2023-02-18 17:59:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 17:59:45,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2023-02-18 17:59:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:59:45,165 INFO L225 Difference]: With dead ends: 44 [2023-02-18 17:59:45,165 INFO L226 Difference]: Without dead ends: 30 [2023-02-18 17:59:45,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 17:59:45,167 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 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 17:59:45,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:59:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-18 17:59:45,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-18 17:59:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 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 17:59:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-18 17:59:45,174 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2023-02-18 17:59:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:59:45,174 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-18 17:59:45,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 17:59:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-18 17:59:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 17:59:45,175 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:59:45,175 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:59:45,183 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 17:59:45,380 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 17:59:45,381 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:59:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:59:45,382 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2023-02-18 17:59:45,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:59:45,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995597857] [2023-02-18 17:59:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:45,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:59:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:45,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 17:59:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:45,547 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 17:59:45,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:59:45,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995597857] [2023-02-18 17:59:45,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995597857] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:59:45,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:59:45,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 17:59:45,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922764218] [2023-02-18 17:59:45,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:59:45,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:59:45,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:59:45,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:59:45,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:59:45,559 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 17:59:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:59:45,635 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2023-02-18 17:59:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:59:45,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 15 [2023-02-18 17:59:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:59:45,638 INFO L225 Difference]: With dead ends: 44 [2023-02-18 17:59:45,639 INFO L226 Difference]: Without dead ends: 42 [2023-02-18 17:59:45,640 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 17:59:45,641 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 13 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:59:45,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 102 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:59:45,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-18 17:59:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2023-02-18 17:59:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 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 17:59:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-18 17:59:45,659 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2023-02-18 17:59:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:59:45,660 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-18 17:59:45,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 17:59:45,660 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-18 17:59:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 17:59:45,660 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:59:45,661 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:59:45,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 17:59:45,661 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:59:45,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:59:45,662 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2023-02-18 17:59:45,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:59:45,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92391456] [2023-02-18 17:59:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:45,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:59:45,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:59:45,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134303377] [2023-02-18 17:59:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:45,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:59:45,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:59:45,673 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 17:59:45,675 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 17:59:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:45,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 17:59:45,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:59:45,752 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 17:59:45,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:59:45,881 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 17:59:45,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:59:45,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92391456] [2023-02-18 17:59:45,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:59:45,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134303377] [2023-02-18 17:59:45,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134303377] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:59:45,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:59:45,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-18 17:59:45,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252303721] [2023-02-18 17:59:45,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:59:45,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 17:59:45,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:59:45,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 17:59:45,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:59:45,884 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 17:59:46,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:59:46,603 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2023-02-18 17:59:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 17:59:46,604 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 20 [2023-02-18 17:59:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:59:46,607 INFO L225 Difference]: With dead ends: 75 [2023-02-18 17:59:46,607 INFO L226 Difference]: Without dead ends: 59 [2023-02-18 17:59:46,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 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 17:59:46,608 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 17:59:46,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 73 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 17:59:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-18 17:59:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2023-02-18 17:59:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 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 17:59:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-02-18 17:59:46,625 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 20 [2023-02-18 17:59:46,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:59:46,625 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-02-18 17:59:46,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 17:59:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-02-18 17:59:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 17:59:46,626 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:59:46,626 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:59:46,635 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 17:59:46,835 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 17:59:46,836 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:59:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:59:46,836 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2023-02-18 17:59:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:59:46,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005093115] [2023-02-18 17:59:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:46,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:59:46,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:59:46,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363950603] [2023-02-18 17:59:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:46,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:59:46,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:59:46,848 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 17:59:46,852 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 17:59:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:46,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 17:59:46,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:59:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 17:59:46,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:59:46,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:59:46,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005093115] [2023-02-18 17:59:46,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:59:46,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363950603] [2023-02-18 17:59:46,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363950603] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:59:46,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:59:46,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 17:59:46,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924532749] [2023-02-18 17:59:46,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:59:46,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:59:46,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:59:46,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:59:46,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:59:46,920 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 17:59:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:59:46,952 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2023-02-18 17:59:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 17:59:46,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-18 17:59:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:59:46,954 INFO L225 Difference]: With dead ends: 72 [2023-02-18 17:59:46,954 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 17:59:46,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:59:46,955 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:59:46,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 117 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:59:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 17:59:46,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-02-18 17:59:46,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 44 states have internal predecessors, (49), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 17:59:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2023-02-18 17:59:46,967 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 28 [2023-02-18 17:59:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:59:46,968 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2023-02-18 17:59:46,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 17:59:46,968 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2023-02-18 17:59:46,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 17:59:46,969 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:59:46,969 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:59:46,977 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 17:59:47,174 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 17:59:47,175 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:59:47,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:59:47,175 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2023-02-18 17:59:47,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:59:47,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244210151] [2023-02-18 17:59:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:47,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:59:47,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:59:47,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992552174] [2023-02-18 17:59:47,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:47,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:59:47,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:59:47,187 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 17:59:47,189 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 17:59:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:47,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 17:59:47,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:59:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 17:59:47,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:59:47,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:59:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244210151] [2023-02-18 17:59:47,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:59:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992552174] [2023-02-18 17:59:47,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992552174] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:59:47,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:59:47,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 17:59:47,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885315847] [2023-02-18 17:59:47,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:59:47,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 17:59:47,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:59:47,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 17:59:47,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 17:59:47,313 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 17:59:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:59:47,524 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-02-18 17:59:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 17:59:47,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-18 17:59:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:59:47,526 INFO L225 Difference]: With dead ends: 71 [2023-02-18 17:59:47,526 INFO L226 Difference]: Without dead ends: 59 [2023-02-18 17:59:47,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:59:47,527 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 44 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:59:47,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 111 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 17:59:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-18 17:59:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-02-18 17:59:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 17:59:47,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2023-02-18 17:59:47,552 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2023-02-18 17:59:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:59:47,553 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2023-02-18 17:59:47,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 17:59:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2023-02-18 17:59:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 17:59:47,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:59:47,555 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:59:47,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 17:59:47,761 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 17:59:47,761 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:59:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:59:47,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1040101153, now seen corresponding path program 1 times [2023-02-18 17:59:47,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:59:47,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017319455] [2023-02-18 17:59:47,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:47,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:59:47,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:59:47,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003407831] [2023-02-18 17:59:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:47,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:59:47,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:59:47,770 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 17:59:47,793 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 17:59:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:47,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 17:59:47,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:59:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 17:59:47,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:59:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 17:59:47,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:59:47,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017319455] [2023-02-18 17:59:47,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:59:47,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003407831] [2023-02-18 17:59:47,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003407831] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:59:47,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:59:47,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 17:59:47,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095315251] [2023-02-18 17:59:47,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:59:47,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 17:59:47,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:59:47,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 17:59:47,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 17:59:47,850 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 17:59:47,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:59:47,979 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2023-02-18 17:59:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 17:59:47,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2023-02-18 17:59:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:59:47,980 INFO L225 Difference]: With dead ends: 137 [2023-02-18 17:59:47,981 INFO L226 Difference]: Without dead ends: 114 [2023-02-18 17:59:47,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 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 17:59:47,982 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 34 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:59:47,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 212 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:59:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-18 17:59:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2023-02-18 17:59:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 75 states have internal predecessors, (82), 24 states have call successors, (24), 14 states have call predecessors, (24), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 17:59:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2023-02-18 17:59:48,001 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 30 [2023-02-18 17:59:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:59:48,001 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2023-02-18 17:59:48,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 17:59:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2023-02-18 17:59:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 17:59:48,002 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:59:48,003 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:59:48,013 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 17:59:48,208 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 17:59:48,208 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:59:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:59:48,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2101649637, now seen corresponding path program 1 times [2023-02-18 17:59:48,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:59:48,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691912483] [2023-02-18 17:59:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:48,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:59:48,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:59:48,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295442446] [2023-02-18 17:59:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:48,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:59:48,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:59:48,217 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 17:59:48,240 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 17:59:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:48,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:59:48,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:59:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:59:48,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:59:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 17:59:48,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:59:48,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691912483] [2023-02-18 17:59:48,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:59:48,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295442446] [2023-02-18 17:59:48,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295442446] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:59:48,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:59:48,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-18 17:59:48,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375053882] [2023-02-18 17:59:48,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:59:48,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 17:59:48,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:59:48,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 17:59:48,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:59:48,325 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 17:59:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:59:48,557 INFO L93 Difference]: Finished difference Result 197 states and 233 transitions. [2023-02-18 17:59:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 17:59:48,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2023-02-18 17:59:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:59:48,562 INFO L225 Difference]: With dead ends: 197 [2023-02-18 17:59:48,562 INFO L226 Difference]: Without dead ends: 183 [2023-02-18 17:59:48,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 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 17:59:48,563 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 91 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:59:48,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 235 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 17:59:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-02-18 17:59:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 176. [2023-02-18 17:59:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 115 states have (on average 1.182608695652174) internal successors, (136), 123 states have internal predecessors, (136), 38 states have call successors, (38), 22 states have call predecessors, (38), 22 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 17:59:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2023-02-18 17:59:48,599 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 46 [2023-02-18 17:59:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:59:48,600 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2023-02-18 17:59:48,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 17:59:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2023-02-18 17:59:48,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 17:59:48,602 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:59:48,603 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:59:48,609 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 17:59:48,808 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 17:59:48,809 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:59:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:59:48,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2103377515, now seen corresponding path program 1 times [2023-02-18 17:59:48,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:59:48,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370054694] [2023-02-18 17:59:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:48,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:59:48,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:59:48,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961473586] [2023-02-18 17:59:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:48,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:59:48,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:59:48,817 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 17:59:48,820 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 17:59:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:48,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 17:59:48,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:59:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 17:59:48,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:59:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 17:59:49,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:59:49,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370054694] [2023-02-18 17:59:49,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:59:49,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961473586] [2023-02-18 17:59:49,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961473586] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:59:49,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:59:49,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2023-02-18 17:59:49,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693105413] [2023-02-18 17:59:49,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:59:49,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 17:59:49,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:59:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 17:59:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:59:49,341 INFO L87 Difference]: Start difference. First operand 176 states and 207 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 17:59:50,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:59:50,420 INFO L93 Difference]: Finished difference Result 252 states and 316 transitions. [2023-02-18 17:59:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 17:59:50,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2023-02-18 17:59:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:59:50,423 INFO L225 Difference]: With dead ends: 252 [2023-02-18 17:59:50,423 INFO L226 Difference]: Without dead ends: 246 [2023-02-18 17:59:50,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-02-18 17:59:50,424 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 91 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 17:59:50,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 221 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 17:59:50,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-18 17:59:50,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 224. [2023-02-18 17:59:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 150 states have (on average 1.2) internal successors, (180), 157 states have internal predecessors, (180), 48 states have call successors, (48), 25 states have call predecessors, (48), 25 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-18 17:59:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 272 transitions. [2023-02-18 17:59:50,464 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 272 transitions. Word has length 46 [2023-02-18 17:59:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:59:50,465 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 272 transitions. [2023-02-18 17:59:50,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 17:59:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 272 transitions. [2023-02-18 17:59:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 17:59:50,470 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:59:50,470 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, 1, 1] [2023-02-18 17:59:50,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-18 17:59:50,675 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 17:59:50,675 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:59:50,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:59:50,676 INFO L85 PathProgramCache]: Analyzing trace with hash 98519191, now seen corresponding path program 1 times [2023-02-18 17:59:50,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:59:50,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882624539] [2023-02-18 17:59:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:50,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:59:50,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:59:50,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127748640] [2023-02-18 17:59:50,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:50,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:59:50,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:59:50,686 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 17:59:50,688 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 17:59:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:50,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-18 17:59:50,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:59:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-18 17:59:50,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:59:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-18 17:59:51,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:59:51,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882624539] [2023-02-18 17:59:51,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:59:51,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127748640] [2023-02-18 17:59:51,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127748640] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:59:51,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:59:51,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-02-18 17:59:51,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296699152] [2023-02-18 17:59:51,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:59:51,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 17:59:51,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:59:51,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 17:59:51,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-02-18 17:59:51,618 INFO L87 Difference]: Start difference. First operand 224 states and 272 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-18 17:59:58,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:59:58,655 INFO L93 Difference]: Finished difference Result 352 states and 445 transitions. [2023-02-18 17:59:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 17:59:58,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2023-02-18 17:59:58,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:59:58,657 INFO L225 Difference]: With dead ends: 352 [2023-02-18 17:59:58,657 INFO L226 Difference]: Without dead ends: 285 [2023-02-18 17:59:58,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 17:59:58,659 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 186 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-02-18 17:59:58,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 236 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-02-18 17:59:58,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-02-18 17:59:58,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 247. [2023-02-18 17:59:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 168 states have (on average 1.2083333333333333) internal successors, (203), 174 states have internal predecessors, (203), 51 states have call successors, (51), 28 states have call predecessors, (51), 27 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2023-02-18 17:59:58,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 301 transitions. [2023-02-18 17:59:58,719 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 301 transitions. Word has length 60 [2023-02-18 17:59:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:59:58,720 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 301 transitions. [2023-02-18 17:59:58,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-18 17:59:58,720 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 301 transitions. [2023-02-18 17:59:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 17:59:58,721 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:59:58,721 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, 1, 1] [2023-02-18 17:59:58,731 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 17:59:58,926 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 17:59:58,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:59:58,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:59:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash -902942769, now seen corresponding path program 1 times [2023-02-18 17:59:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:59:58,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393337651] [2023-02-18 17:59:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:58,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:59:58,943 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:59:58,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968250115] [2023-02-18 17:59:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:59:58,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:59:58,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:59:58,948 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 17:59:58,951 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 17:59:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:59:58,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 17:59:58,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:59:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 17:59:59,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:59:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 17:59:59,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:59:59,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393337651] [2023-02-18 17:59:59,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:59:59,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968250115] [2023-02-18 17:59:59,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968250115] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:59:59,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:59:59,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-02-18 17:59:59,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664284753] [2023-02-18 17:59:59,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:59:59,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 17:59:59,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:59:59,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 17:59:59,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-02-18 17:59:59,686 INFO L87 Difference]: Start difference. First operand 247 states and 301 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 18:00:02,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:00:02,273 INFO L93 Difference]: Finished difference Result 352 states and 440 transitions. [2023-02-18 18:00:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 18:00:02,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 71 [2023-02-18 18:00:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:00:02,275 INFO L225 Difference]: With dead ends: 352 [2023-02-18 18:00:02,275 INFO L226 Difference]: Without dead ends: 279 [2023-02-18 18:00:02,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2023-02-18 18:00:02,276 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 103 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-18 18:00:02,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 277 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-18 18:00:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-02-18 18:00:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 254. [2023-02-18 18:00:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 172 states have (on average 1.1627906976744187) internal successors, (200), 177 states have internal predecessors, (200), 53 states have call successors, (53), 28 states have call predecessors, (53), 28 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2023-02-18 18:00:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 303 transitions. [2023-02-18 18:00:02,335 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 303 transitions. Word has length 71 [2023-02-18 18:00:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:00:02,336 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 303 transitions. [2023-02-18 18:00:02,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 18:00:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 303 transitions. [2023-02-18 18:00:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-18 18:00:02,337 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:00:02,337 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:00:02,348 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 18:00:02,542 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 18:00:02,543 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:00:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:00:02,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1932765757, now seen corresponding path program 2 times [2023-02-18 18:00:02,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:00:02,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500060948] [2023-02-18 18:00:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:00:02,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:00:02,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:00:02,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407946837] [2023-02-18 18:00:02,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:00:02,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:00:02,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:00:02,564 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 18:00:02,566 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 18:00:02,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:00:02,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:00:02,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 18:00:02,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:00:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 18:00:02,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:00:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 18:00:02,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:00:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500060948] [2023-02-18 18:00:02,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:00:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407946837] [2023-02-18 18:00:02,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407946837] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:00:02,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:00:02,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2023-02-18 18:00:02,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638057321] [2023-02-18 18:00:02,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:00:02,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:00:02,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:00:02,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:00:02,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:00:02,652 INFO L87 Difference]: Start difference. First operand 254 states and 303 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-02-18 18:00:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:00:02,746 INFO L93 Difference]: Finished difference Result 288 states and 346 transitions. [2023-02-18 18:00:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 18:00:02,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 74 [2023-02-18 18:00:02,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:00:02,748 INFO L225 Difference]: With dead ends: 288 [2023-02-18 18:00:02,748 INFO L226 Difference]: Without dead ends: 218 [2023-02-18 18:00:02,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:00:02,752 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:00:02,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:00:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-18 18:00:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2023-02-18 18:00:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 148 states have (on average 1.1486486486486487) internal successors, (170), 152 states have internal predecessors, (170), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-02-18 18:00:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 256 transitions. [2023-02-18 18:00:02,808 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 256 transitions. Word has length 74 [2023-02-18 18:00:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:00:02,809 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 256 transitions. [2023-02-18 18:00:02,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-02-18 18:00:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 256 transitions. [2023-02-18 18:00:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-18 18:00:02,811 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:00:02,811 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, 1, 1] [2023-02-18 18:00:02,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 18:00:03,017 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 18:00:03,017 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:00:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:00:03,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1315137972, now seen corresponding path program 3 times [2023-02-18 18:00:03,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:00:03,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365788653] [2023-02-18 18:00:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:00:03,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:00:03,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:00:03,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981476766] [2023-02-18 18:00:03,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 18:00:03,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:00:03,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:00:03,026 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 18:00:03,028 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 18:00:03,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 18:00:03,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:00:03,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-18 18:00:03,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:00:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-02-18 18:00:03,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:00:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 24 refuted. 6 times theorem prover too weak. 312 trivial. 0 not checked. [2023-02-18 18:00:13,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:00:13,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365788653] [2023-02-18 18:00:13,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:00:13,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981476766] [2023-02-18 18:00:13,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981476766] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:00:13,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:00:13,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-02-18 18:00:13,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594965727] [2023-02-18 18:00:13,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:00:13,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 18:00:13,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:00:13,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 18:00:13,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=309, Unknown=3, NotChecked=0, Total=380 [2023-02-18 18:00:13,380 INFO L87 Difference]: Start difference. First operand 218 states and 256 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 18 states have internal predecessors, (53), 10 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-18 18:00:28,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:00:32,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:00:35,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:00:37,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:00:39,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:00:39,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:00:39,604 INFO L93 Difference]: Finished difference Result 305 states and 391 transitions. [2023-02-18 18:00:39,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 18:00:39,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 18 states have internal predecessors, (53), 10 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 92 [2023-02-18 18:00:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:00:39,609 INFO L225 Difference]: With dead ends: 305 [2023-02-18 18:00:39,609 INFO L226 Difference]: Without dead ends: 274 [2023-02-18 18:00:39,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=205, Invalid=846, Unknown=5, NotChecked=0, Total=1056 [2023-02-18 18:00:39,612 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 181 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 220 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:00:39,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 331 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 858 Invalid, 4 Unknown, 0 Unchecked, 19.0s Time] [2023-02-18 18:00:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-02-18 18:00:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 246. [2023-02-18 18:00:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 165 states have (on average 1.1818181818181819) internal successors, (195), 171 states have internal predecessors, (195), 54 states have call successors, (54), 26 states have call predecessors, (54), 26 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2023-02-18 18:00:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 301 transitions. [2023-02-18 18:00:39,729 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 301 transitions. Word has length 92 [2023-02-18 18:00:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:00:39,729 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 301 transitions. [2023-02-18 18:00:39,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 18 states have internal predecessors, (53), 10 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-18 18:00:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 301 transitions. [2023-02-18 18:00:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-02-18 18:00:39,731 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:00:39,731 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, 1, 1] [2023-02-18 18:00:39,741 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 18:00:39,937 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 18:00:39,937 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:00:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:00:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash 57999976, now seen corresponding path program 1 times [2023-02-18 18:00:39,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:00:39,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738741671] [2023-02-18 18:00:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:00:39,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:00:39,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:00:39,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897389256] [2023-02-18 18:00:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:00:39,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:00:39,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:00:39,947 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 18:00:39,951 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 18:00:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:00:40,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 18:00:40,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:00:40,035 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 18:00:40,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:00:40,077 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 18:00:40,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:00:40,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738741671] [2023-02-18 18:00:40,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:00:40,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897389256] [2023-02-18 18:00:40,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897389256] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:00:40,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:00:40,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 18:00:40,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623821746] [2023-02-18 18:00:40,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:00:40,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 18:00:40,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:00:40,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 18:00:40,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 18:00:40,079 INFO L87 Difference]: Start difference. First operand 246 states and 301 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 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 18:00:40,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:00:40,662 INFO L93 Difference]: Finished difference Result 640 states and 823 transitions. [2023-02-18 18:00:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 18:00:40,663 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 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 98 [2023-02-18 18:00:40,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:00:40,666 INFO L225 Difference]: With dead ends: 640 [2023-02-18 18:00:40,666 INFO L226 Difference]: Without dead ends: 542 [2023-02-18 18:00:40,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 182 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 18:00:40,667 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 150 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 18:00:40,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 309 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 18:00:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-02-18 18:00:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 520. [2023-02-18 18:00:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 338 states have (on average 1.2248520710059172) internal successors, (414), 360 states have internal predecessors, (414), 125 states have call successors, (125), 57 states have call predecessors, (125), 56 states have return successors, (116), 102 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-18 18:00:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 655 transitions. [2023-02-18 18:00:40,941 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 655 transitions. Word has length 98 [2023-02-18 18:00:40,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:00:40,941 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 655 transitions. [2023-02-18 18:00:40,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 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 18:00:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 655 transitions. [2023-02-18 18:00:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-18 18:00:40,943 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:00:40,943 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, 1, 1] [2023-02-18 18:00:40,948 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 18:00:41,147 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 18:00:41,147 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:00:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:00:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash 900247290, now seen corresponding path program 2 times [2023-02-18 18:00:41,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:00:41,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474480612] [2023-02-18 18:00:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:00:41,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:00:41,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:00:41,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596508922] [2023-02-18 18:00:41,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:00:41,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:00:41,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:00:41,164 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 18:00:41,167 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 18:00:41,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:00:41,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:00:41,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 18:00:41,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:00:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-18 18:00:48,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:00:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-18 18:00:53,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:00:53,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474480612] [2023-02-18 18:00:53,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:00:53,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596508922] [2023-02-18 18:00:53,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596508922] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:00:53,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:00:53,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-02-18 18:00:53,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481613699] [2023-02-18 18:00:53,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:00:53,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 18:00:53,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:00:53,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 18:00:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-02-18 18:00:53,888 INFO L87 Difference]: Start difference. First operand 520 states and 655 transitions. Second operand has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 14 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-18 18:01:07,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:01:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:16,157 INFO L93 Difference]: Finished difference Result 675 states and 869 transitions. [2023-02-18 18:01:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 18:01:16,157 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 14 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 103 [2023-02-18 18:01:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:16,160 INFO L225 Difference]: With dead ends: 675 [2023-02-18 18:01:16,160 INFO L226 Difference]: Without dead ends: 530 [2023-02-18 18:01:16,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 169 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=454, Invalid=1526, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 18:01:16,162 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 191 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:16,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 453 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time] [2023-02-18 18:01:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2023-02-18 18:01:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 475. [2023-02-18 18:01:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 310 states have (on average 1.2129032258064516) internal successors, (376), 326 states have internal predecessors, (376), 111 states have call successors, (111), 53 states have call predecessors, (111), 53 states have return successors, (104), 95 states have call predecessors, (104), 104 states have call successors, (104) [2023-02-18 18:01:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 591 transitions. [2023-02-18 18:01:16,462 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 591 transitions. Word has length 103 [2023-02-18 18:01:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:16,462 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 591 transitions. [2023-02-18 18:01:16,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 14 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-18 18:01:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 591 transitions. [2023-02-18 18:01:16,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-18 18:01:16,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:16,463 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:16,472 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 18:01:16,669 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 18:01:16,670 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:16,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:16,670 INFO L85 PathProgramCache]: Analyzing trace with hash -353318641, now seen corresponding path program 1 times [2023-02-18 18:01:16,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:16,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268505788] [2023-02-18 18:01:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:16,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:16,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:01:16,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506717857] [2023-02-18 18:01:16,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:16,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:16,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:16,678 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 18:01:16,681 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 18:01:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:16,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 18:01:16,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 18:01:16,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:01:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-02-18 18:01:16,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268505788] [2023-02-18 18:01:16,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:01:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506717857] [2023-02-18 18:01:16,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506717857] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:01:16,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:01:16,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2023-02-18 18:01:16,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458308078] [2023-02-18 18:01:16,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:01:16,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 18:01:16,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 18:01:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 18:01:16,820 INFO L87 Difference]: Start difference. First operand 475 states and 591 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (33), 8 states have call predecessors, (33), 7 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2023-02-18 18:01:17,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:17,379 INFO L93 Difference]: Finished difference Result 523 states and 648 transitions. [2023-02-18 18:01:17,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 18:01:17,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (33), 8 states have call predecessors, (33), 7 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 110 [2023-02-18 18:01:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:17,382 INFO L225 Difference]: With dead ends: 523 [2023-02-18 18:01:17,382 INFO L226 Difference]: Without dead ends: 477 [2023-02-18 18:01:17,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 202 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2023-02-18 18:01:17,383 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 83 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:17,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 322 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 18:01:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-02-18 18:01:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 473. [2023-02-18 18:01:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 321 states have (on average 1.158878504672897) internal successors, (372), 327 states have internal predecessors, (372), 102 states have call successors, (102), 49 states have call predecessors, (102), 49 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2023-02-18 18:01:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 572 transitions. [2023-02-18 18:01:17,692 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 572 transitions. Word has length 110 [2023-02-18 18:01:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:17,693 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 572 transitions. [2023-02-18 18:01:17,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (33), 8 states have call predecessors, (33), 7 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2023-02-18 18:01:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 572 transitions. [2023-02-18 18:01:17,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-18 18:01:17,694 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:17,694 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, 1, 1] [2023-02-18 18:01:17,700 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 18:01:17,900 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 18:01:17,900 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:17,901 INFO L85 PathProgramCache]: Analyzing trace with hash 488955713, now seen corresponding path program 4 times [2023-02-18 18:01:17,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:17,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44586786] [2023-02-18 18:01:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:17,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:17,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:01:17,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688557226] [2023-02-18 18:01:17,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 18:01:17,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:17,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:17,910 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 18:01:17,928 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 18:01:18,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 18:01:18,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:01:18,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-18 18:01:18,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 106 proven. 89 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-02-18 18:01:18,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:04:10,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:04:10,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44586786] [2023-02-18 18:04:10,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:04:10,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688557226] [2023-02-18 18:04:10,034 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2023-02-18 18:04:10,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-18 18:04:10,235 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 18:04:10,236 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Probably an infinite loop! at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtils.preprocessDualFiniteJunction(QuantifierPushUtils.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:323) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-02-18 18:04:10,240 INFO L158 Benchmark]: Toolchain (without parser) took 266578.14ms. Allocated memory was 146.8MB in the beginning and 664.8MB in the end (delta: 518.0MB). Free memory was 118.3MB in the beginning and 588.5MB in the end (delta: -470.3MB). Peak memory consumption was 424.1MB. Max. memory is 16.1GB. [2023-02-18 18:04:10,240 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 115.3MB. Free memory is still 81.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 18:04:10,240 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.97ms. Allocated memory is still 146.8MB. Free memory was 117.5MB in the beginning and 107.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 18:04:10,241 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.50ms. Allocated memory is still 146.8MB. Free memory was 107.0MB in the beginning and 105.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 18:04:10,241 INFO L158 Benchmark]: Boogie Preprocessor took 39.27ms. Allocated memory is still 146.8MB. Free memory was 105.7MB in the beginning and 104.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 18:04:10,241 INFO L158 Benchmark]: RCFGBuilder took 268.86ms. Allocated memory is still 146.8MB. Free memory was 104.5MB in the beginning and 93.2MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-18 18:04:10,242 INFO L158 Benchmark]: TraceAbstraction took 265993.47ms. Allocated memory was 146.8MB in the beginning and 664.8MB in the end (delta: 518.0MB). Free memory was 93.2MB in the beginning and 588.5MB in the end (delta: -495.3MB). Peak memory consumption was 398.9MB. Max. memory is 16.1GB. [2023-02-18 18:04:10,243 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 115.3MB. Free memory is still 81.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 241.97ms. Allocated memory is still 146.8MB. Free memory was 117.5MB in the beginning and 107.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.50ms. Allocated memory is still 146.8MB. Free memory was 107.0MB in the beginning and 105.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.27ms. Allocated memory is still 146.8MB. Free memory was 105.7MB in the beginning and 104.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 268.86ms. Allocated memory is still 146.8MB. Free memory was 104.5MB in the beginning and 93.2MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 265993.47ms. Allocated memory was 146.8MB in the beginning and 664.8MB in the end (delta: 518.0MB). Free memory was 93.2MB in the beginning and 588.5MB in the end (delta: -495.3MB). Peak memory consumption was 398.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Probably an infinite loop! de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Probably an infinite loop!: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtils.preprocessDualFiniteJunction(QuantifierPushUtils.java:124) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2023-02-18 18:04:10,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/hard-ll_unwindbound10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 c8cdca66dc863bfa94d37a0903946c6b89240a08b13e8fd34226289180db2a40 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 18:04:12,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 18:04:12,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 18:04:12,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 18:04:12,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 18:04:12,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 18:04:12,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 18:04:12,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 18:04:12,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 18:04:12,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 18:04:12,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 18:04:12,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 18:04:12,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 18:04:12,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 18:04:12,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 18:04:12,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 18:04:12,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 18:04:12,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 18:04:12,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 18:04:12,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 18:04:12,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 18:04:12,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 18:04:12,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 18:04:12,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 18:04:12,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 18:04:12,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 18:04:12,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 18:04:12,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 18:04:12,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 18:04:12,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 18:04:12,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 18:04:12,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 18:04:12,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 18:04:12,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 18:04:12,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 18:04:12,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 18:04:12,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 18:04:12,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 18:04:12,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 18:04:12,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 18:04:12,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 18:04:12,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-18 18:04:12,335 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 18:04:12,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 18:04:12,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 18:04:12,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 18:04:12,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 18:04:12,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 18:04:12,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 18:04:12,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 18:04:12,339 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 18:04:12,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 18:04:12,340 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 18:04:12,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 18:04:12,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 18:04:12,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 18:04:12,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 18:04:12,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 18:04:12,341 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 18:04:12,341 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-18 18:04:12,342 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-18 18:04:12,342 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 18:04:12,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 18:04:12,342 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 18:04:12,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 18:04:12,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 18:04:12,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 18:04:12,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 18:04:12,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 18:04:12,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 18:04:12,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 18:04:12,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 18:04:12,344 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-18 18:04:12,344 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-18 18:04:12,345 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 18:04:12,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 18:04:12,345 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 18:04:12,345 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 18:04:12,345 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-18 18:04:12,346 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 18:04:12,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8cdca66dc863bfa94d37a0903946c6b89240a08b13e8fd34226289180db2a40 [2023-02-18 18:04:12,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 18:04:12,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 18:04:12,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 18:04:12,645 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 18:04:12,645 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 18:04:12,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c [2023-02-18 18:04:13,839 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 18:04:14,035 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 18:04:14,035 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c [2023-02-18 18:04:14,040 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15e092f97/f06a259746ed463c87a6d9100c644022/FLAGf0bd82342 [2023-02-18 18:04:14,050 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15e092f97/f06a259746ed463c87a6d9100c644022 [2023-02-18 18:04:14,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 18:04:14,052 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 18:04:14,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 18:04:14,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 18:04:14,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 18:04:14,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@342a1b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14, skipping insertion in model container [2023-02-18 18:04:14,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 18:04:14,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 18:04:14,181 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/hard-ll_unwindbound10.c[538,551] [2023-02-18 18:04:14,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 18:04:14,203 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 18:04:14,213 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/hard-ll_unwindbound10.c[538,551] [2023-02-18 18:04:14,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 18:04:14,230 INFO L208 MainTranslator]: Completed translation [2023-02-18 18:04:14,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14 WrapperNode [2023-02-18 18:04:14,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 18:04:14,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 18:04:14,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 18:04:14,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 18:04:14,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,265 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-18 18:04:14,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 18:04:14,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 18:04:14,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 18:04:14,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 18:04:14,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,300 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 18:04:14,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 18:04:14,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 18:04:14,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 18:04:14,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14" (1/1) ... [2023-02-18 18:04:14,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 18:04:14,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:04:14,340 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 18:04:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 18:04:14,383 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 18:04:14,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-18 18:04:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 18:04:14,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 18:04:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 18:04:14,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 18:04:14,464 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 18:04:14,466 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 18:04:14,884 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 18:04:14,889 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 18:04:14,889 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 18:04:14,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 06:04:14 BoogieIcfgContainer [2023-02-18 18:04:14,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 18:04:14,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 18:04:14,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 18:04:14,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 18:04:14,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 06:04:14" (1/3) ... [2023-02-18 18:04:14,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bc1e3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 06:04:14, skipping insertion in model container [2023-02-18 18:04:14,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:04:14" (2/3) ... [2023-02-18 18:04:14,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bc1e3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 06:04:14, skipping insertion in model container [2023-02-18 18:04:14,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 06:04:14" (3/3) ... [2023-02-18 18:04:14,897 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound10.c [2023-02-18 18:04:14,918 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 18:04:14,919 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 18:04:14,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 18:04:14,976 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;@4e9a63fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 18:04:14,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 18:04:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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 18:04:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 18:04:14,984 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:04:14,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:04:14,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:04:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:04:14,989 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2023-02-18 18:04:14,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:04:14,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286633892] [2023-02-18 18:04:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:04:15,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:15,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:04:15,009 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:04:15,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-02-18 18:04:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:04:15,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 18:04:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:04:15,119 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 18:04:15,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:04:15,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:04:15,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286633892] [2023-02-18 18:04:15,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286633892] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:04:15,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:04:15,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 18:04:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456573688] [2023-02-18 18:04:15,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:04:15,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 18:04:15,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:04:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 18:04:15,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 18:04:15,159 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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 4.5) internal successors, (9), 2 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 18:04:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:04:15,185 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2023-02-18 18:04:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 18:04:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 18:04:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:04:15,193 INFO L225 Difference]: With dead ends: 53 [2023-02-18 18:04:15,193 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 18:04:15,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 18:04:15,198 INFO L413 NwaCegarLoop]: 38 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, 38 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 18:04:15,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:04:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 18:04:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-18 18:04:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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 18:04:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2023-02-18 18:04:15,228 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2023-02-18 18:04:15,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:04:15,228 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2023-02-18 18:04:15,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 18:04:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2023-02-18 18:04:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 18:04:15,230 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:04:15,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:04:15,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-02-18 18:04:15,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:15,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:04:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:04:15,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2023-02-18 18:04:15,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:04:15,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258744503] [2023-02-18 18:04:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:04:15,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:15,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:04:15,435 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:04:15,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-02-18 18:04:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:04:15,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 18:04:15,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:04:15,498 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 18:04:15,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:04:15,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:04:15,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258744503] [2023-02-18 18:04:15,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258744503] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:04:15,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:04:15,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:04:15,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226680206] [2023-02-18 18:04:15,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:04:15,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:04:15,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:04:15,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:04:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:04:15,502 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 18:04:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:04:15,703 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2023-02-18 18:04:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 18:04:15,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 18:04:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:04:15,705 INFO L225 Difference]: With dead ends: 38 [2023-02-18 18:04:15,705 INFO L226 Difference]: Without dead ends: 36 [2023-02-18 18:04:15,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 18:04:15,707 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:04:15,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 107 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:04:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-18 18:04:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2023-02-18 18:04:15,715 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 18:04:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-18 18:04:15,716 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-18 18:04:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:04:15,716 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-18 18:04:15,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 18:04:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-18 18:04:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 18:04:15,717 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:04:15,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:04:15,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-02-18 18:04:15,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:15,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:04:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:04:15,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2023-02-18 18:04:15,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:04:15,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951275953] [2023-02-18 18:04:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:04:15,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:15,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:04:15,927 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:04:15,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-02-18 18:04:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:04:16,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 18:04:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:04:16,079 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 18:04:16,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:04:16,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:04:16,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951275953] [2023-02-18 18:04:16,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951275953] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:04:16,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:04:16,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 18:04:16,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411001990] [2023-02-18 18:04:16,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:04:16,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 18:04:16,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:04:16,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 18:04:16,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 18:04:16,082 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 18:04:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:04:16,105 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2023-02-18 18:04:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 18:04:16,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2023-02-18 18:04:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:04:16,106 INFO L225 Difference]: With dead ends: 44 [2023-02-18 18:04:16,107 INFO L226 Difference]: Without dead ends: 30 [2023-02-18 18:04:16,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 18:04:16,108 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 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 18:04:16,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:04:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-18 18:04:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-18 18:04:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 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 18:04:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-18 18:04:16,115 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2023-02-18 18:04:16,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:04:16,115 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-18 18:04:16,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 18:04:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-18 18:04:16,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 18:04:16,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:04:16,116 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:04:16,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-02-18 18:04:16,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:16,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:04:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:04:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2023-02-18 18:04:16,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:04:16,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91342836] [2023-02-18 18:04:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:04:16,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:16,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:04:16,331 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:04:16,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-02-18 18:04:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:04:16,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 18:04:16,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:04:16,396 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 18:04:16,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:04:16,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:04:16,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91342836] [2023-02-18 18:04:16,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91342836] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:04:16,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:04:16,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:04:16,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31025577] [2023-02-18 18:04:16,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:04:16,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:04:16,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:04:16,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:04:16,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:04:16,410 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 18:04:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:04:16,709 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2023-02-18 18:04:16,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 18:04:16,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 15 [2023-02-18 18:04:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:04:16,711 INFO L225 Difference]: With dead ends: 44 [2023-02-18 18:04:16,711 INFO L226 Difference]: Without dead ends: 42 [2023-02-18 18:04:16,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 18:04:16,712 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 18:04:16,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 103 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 18:04:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-18 18:04:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2023-02-18 18:04:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 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 18:04:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-18 18:04:16,720 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2023-02-18 18:04:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:04:16,720 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-18 18:04:16,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 18:04:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-18 18:04:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 18:04:16,721 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:04:16,721 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:04:16,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-02-18 18:04:16,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:16,929 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:04:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:04:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2023-02-18 18:04:16,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:04:16,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203219373] [2023-02-18 18:04:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:04:16,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:16,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:04:16,931 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:04:16,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-02-18 18:04:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:04:16,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 18:04:16,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:04:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 18:04:17,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:04:17,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:04:17,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203219373] [2023-02-18 18:04:17,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203219373] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:04:17,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:04:17,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:04:17,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525920987] [2023-02-18 18:04:17,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:04:17,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:04:17,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:04:17,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:04:17,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:04:17,017 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 18:04:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:04:17,839 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2023-02-18 18:04:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 18:04:17,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-02-18 18:04:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:04:17,842 INFO L225 Difference]: With dead ends: 63 [2023-02-18 18:04:17,842 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 18:04:17,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 18:04:17,843 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 18:04:17,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 112 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 18:04:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 18:04:17,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-02-18 18:04:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 18:04:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2023-02-18 18:04:17,852 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 20 [2023-02-18 18:04:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:04:17,852 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2023-02-18 18:04:17,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 18:04:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2023-02-18 18:04:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 18:04:17,853 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:04:17,853 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:04:17,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-02-18 18:04:18,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:18,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:04:18,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:04:18,058 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2023-02-18 18:04:18,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:04:18,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519988191] [2023-02-18 18:04:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:04:18,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:18,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:04:18,060 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:04:18,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-02-18 18:04:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:04:18,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 18:04:18,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:04:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 18:04:18,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:04:18,169 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:04:18,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519988191] [2023-02-18 18:04:18,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519988191] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:04:18,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:04:18,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 18:04:18,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115913394] [2023-02-18 18:04:18,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:04:18,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:04:18,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:04:18,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:04:18,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:04:18,172 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 18:04:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:04:18,305 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2023-02-18 18:04:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 18:04:18,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-18 18:04:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:04:18,307 INFO L225 Difference]: With dead ends: 68 [2023-02-18 18:04:18,307 INFO L226 Difference]: Without dead ends: 61 [2023-02-18 18:04:18,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:04:18,308 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:04:18,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 120 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:04:18,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-18 18:04:18,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-02-18 18:04:18,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 41 states have internal predecessors, (46), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 18:04:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-02-18 18:04:18,317 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 28 [2023-02-18 18:04:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:04:18,318 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-02-18 18:04:18,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 18:04:18,318 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-02-18 18:04:18,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 18:04:18,319 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:04:18,319 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:04:18,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-02-18 18:04:18,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:18,525 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:04:18,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:04:18,526 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2023-02-18 18:04:18,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:04:18,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510395902] [2023-02-18 18:04:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:04:18,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:18,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:04:18,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:04:18,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-02-18 18:04:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:04:18,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 18:04:18,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:04:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 18:04:18,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:04:18,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:04:18,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510395902] [2023-02-18 18:04:18,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510395902] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:04:18,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:04:18,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:04:18,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723067036] [2023-02-18 18:04:18,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:04:18,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:04:18,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:04:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:04:18,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:04:18,645 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 18:04:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:04:19,090 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2023-02-18 18:04:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 18:04:19,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-18 18:04:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:04:19,092 INFO L225 Difference]: With dead ends: 74 [2023-02-18 18:04:19,093 INFO L226 Difference]: Without dead ends: 62 [2023-02-18 18:04:19,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 18:04:19,094 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 18:04:19,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 18:04:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-18 18:04:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2023-02-18 18:04:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 18:04:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-02-18 18:04:19,104 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 28 [2023-02-18 18:04:19,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:04:19,104 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-02-18 18:04:19,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 18:04:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-02-18 18:04:19,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 18:04:19,105 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:04:19,105 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, 1, 1] [2023-02-18 18:04:19,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-02-18 18:04:19,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:19,317 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:04:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:04:19,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1091220578, now seen corresponding path program 1 times [2023-02-18 18:04:19,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:04:19,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499322288] [2023-02-18 18:04:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:04:19,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:19,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:04:19,319 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:04:19,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-02-18 18:04:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:04:19,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 18:04:19,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:04:19,423 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 18:04:19,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:04:19,471 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 18:04:19,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:04:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499322288] [2023-02-18 18:04:19,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499322288] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:04:19,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:04:19,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 18:04:19,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606391353] [2023-02-18 18:04:19,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:04:19,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 18:04:19,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:04:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 18:04:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-18 18:04:19,473 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 18:04:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:04:20,417 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2023-02-18 18:04:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 18:04:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 35 [2023-02-18 18:04:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:04:20,420 INFO L225 Difference]: With dead ends: 142 [2023-02-18 18:04:20,420 INFO L226 Difference]: Without dead ends: 117 [2023-02-18 18:04:20,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-02-18 18:04:20,421 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 36 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 18:04:20,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 215 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 18:04:20,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-18 18:04:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2023-02-18 18:04:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 75 states have internal predecessors, (87), 23 states have call successors, (23), 14 states have call predecessors, (23), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 18:04:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2023-02-18 18:04:20,436 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 35 [2023-02-18 18:04:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:04:20,436 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2023-02-18 18:04:20,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 18:04:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2023-02-18 18:04:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 18:04:20,437 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:04:20,437 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:04:20,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-02-18 18:04:20,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:20,645 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:04:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:04:20,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1884102282, now seen corresponding path program 1 times [2023-02-18 18:04:20,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:04:20,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194222841] [2023-02-18 18:04:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:04:20,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:20,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:04:20,647 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:04:20,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-02-18 18:04:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:04:20,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 18:04:20,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:04:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 18:04:20,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:04:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 18:04:21,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:04:21,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194222841] [2023-02-18 18:04:21,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194222841] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 18:04:21,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 18:04:21,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-02-18 18:04:21,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140388075] [2023-02-18 18:04:21,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:04:21,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 18:04:21,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:04:21,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 18:04:21,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-02-18 18:04:21,603 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 18:04:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:04:24,077 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2023-02-18 18:04:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 18:04:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-02-18 18:04:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:04:24,079 INFO L225 Difference]: With dead ends: 127 [2023-02-18 18:04:24,079 INFO L226 Difference]: Without dead ends: 123 [2023-02-18 18:04:24,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-02-18 18:04:24,080 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-18 18:04:24,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 109 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-18 18:04:24,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-18 18:04:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2023-02-18 18:04:24,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 82 states have internal predecessors, (93), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-18 18:04:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2023-02-18 18:04:24,105 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 38 [2023-02-18 18:04:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:04:24,105 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2023-02-18 18:04:24,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 18:04:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2023-02-18 18:04:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 18:04:24,106 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:04:24,106 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, 1, 1] [2023-02-18 18:04:24,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-02-18 18:04:24,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:24,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:04:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:04:24,308 INFO L85 PathProgramCache]: Analyzing trace with hash -785132454, now seen corresponding path program 1 times [2023-02-18 18:04:24,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:04:24,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357752985] [2023-02-18 18:04:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:04:24,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:24,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:04:24,310 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:04:24,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-02-18 18:04:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:04:24,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 18:04:24,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:04:24,488 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 18:04:24,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:04:24,572 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 18:04:24,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:04:24,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357752985] [2023-02-18 18:04:24,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357752985] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:04:24,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:04:24,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-18 18:04:24,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282356886] [2023-02-18 18:04:24,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:04:24,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 18:04:24,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:04:24,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 18:04:24,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-18 18:04:24,574 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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 18:04:26,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:04:26,933 INFO L93 Difference]: Finished difference Result 243 states and 296 transitions. [2023-02-18 18:04:26,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 18:04:26,934 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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 51 [2023-02-18 18:04:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:04:26,936 INFO L225 Difference]: With dead ends: 243 [2023-02-18 18:04:26,936 INFO L226 Difference]: Without dead ends: 222 [2023-02-18 18:04:26,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-02-18 18:04:26,937 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:04:26,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 324 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-18 18:04:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-02-18 18:04:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2023-02-18 18:04:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 149 states have internal predecessors, (167), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2023-02-18 18:04:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 261 transitions. [2023-02-18 18:04:26,967 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 261 transitions. Word has length 51 [2023-02-18 18:04:26,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:04:26,968 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 261 transitions. [2023-02-18 18:04:26,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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 18:04:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 261 transitions. [2023-02-18 18:04:26,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 18:04:26,970 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:04:26,970 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, 1, 1] [2023-02-18 18:04:26,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-02-18 18:04:27,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:27,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:04:27,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:04:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash 98519191, now seen corresponding path program 1 times [2023-02-18 18:04:27,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:04:27,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592213993] [2023-02-18 18:04:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:04:27,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:04:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:04:27,185 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:04:27,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-02-18 18:04:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:04:27,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 18:04:27,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:04:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-18 18:04:28,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:05:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-18 18:05:06,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:05:06,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592213993] [2023-02-18 18:05:06,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592213993] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:05:06,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:05:06,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-02-18 18:05:06,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950911285] [2023-02-18 18:05:06,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:05:06,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 18:05:06,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:05:06,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 18:05:06,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-02-18 18:05:06,704 INFO L87 Difference]: Start difference. First operand 215 states and 261 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-18 18:05:13,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:05:15,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:05:26,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:05:29,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:05:35,840 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvuge |c_ULTIMATE.start_main_~B~0#1| (_ bv1 32))) (.cse1 ((_ zero_extend 32) |c_ULTIMATE.start_main_~A~0#1|)) (.cse2 ((_ zero_extend 32) |c_ULTIMATE.start_main_~B~0#1|)) (.cse3 (not (bvsge |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~d~0#1|)))) (and .cse0 (= .cse1 (bvadd (bvmul |c_ULTIMATE.start_main_~q~0#1| .cse2) |c_ULTIMATE.start_main_~r~0#1|)) (or (= .cse1 (bvadd (bvmul (bvadd |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~p~0#1|) .cse2) (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg |c_ULTIMATE.start_main_~d~0#1|)))) .cse3) (or (and (not .cse0) (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (and (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32)) .cse0)) (let ((.cse4 (bvsdiv |c_ULTIMATE.start_main_~d~0#1| (_ bv2 64)))) (or (= .cse1 (bvadd (bvmul (bvadd |c_ULTIMATE.start_main_~q~0#1| (bvsdiv |c_ULTIMATE.start_main_~p~0#1| (_ bv2 64))) .cse2) (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg .cse4)))) (not (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse4)))) (let ((.cse6 (bvmul (_ bv2 64) |c_ULTIMATE.start_main_~d~0#1|))) (let ((.cse5 (bvsdiv .cse6 (_ bv2 64)))) (or (not (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse5)) (= .cse1 (bvadd (bvmul (bvadd |c_ULTIMATE.start_main_~q~0#1| (bvsdiv (bvmul (_ bv2 64) |c_ULTIMATE.start_main_~p~0#1|) (_ bv2 64))) .cse2) (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg .cse5)))) (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse6) .cse3))))) is different from false [2023-02-18 18:05:56,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:05:59,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:06:04,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:06:05,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:06:07,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:06:21,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:06:40,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:06:43,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:06:45,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:06:47,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:06:53,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:06:59,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:07:04,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:07:05,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:07:09,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:07:12,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:07:14,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:07:17,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:07:20,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:07:37,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:07:48,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:07:50,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:07:58,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:08:30,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:08:32,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:08:36,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:08:39,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:08:40,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:08:41,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:08:44,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:08:46,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:08:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:08:46,476 INFO L93 Difference]: Finished difference Result 379 states and 492 transitions. [2023-02-18 18:08:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 18:08:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2023-02-18 18:08:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:08:46,586 INFO L225 Difference]: With dead ends: 379 [2023-02-18 18:08:46,586 INFO L226 Difference]: Without dead ends: 303 [2023-02-18 18:08:46,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 121.9s TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=4, NotChecked=58, Total=992 [2023-02-18 18:08:46,588 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 83 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 122 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 136.7s IncrementalHoareTripleChecker+Time [2023-02-18 18:08:46,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 373 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 492 Invalid, 9 Unknown, 1 Unchecked, 136.7s Time] [2023-02-18 18:08:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-02-18 18:08:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 239. [2023-02-18 18:08:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 160 states have (on average 1.2) internal successors, (192), 167 states have internal predecessors, (192), 49 states have call successors, (49), 29 states have call predecessors, (49), 29 states have return successors, (46), 42 states have call predecessors, (46), 46 states have call successors, (46) [2023-02-18 18:08:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 287 transitions. [2023-02-18 18:08:46,628 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 287 transitions. Word has length 60 [2023-02-18 18:08:46,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:08:46,628 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 287 transitions. [2023-02-18 18:08:46,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-18 18:08:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 287 transitions. [2023-02-18 18:08:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-18 18:08:46,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:08:46,630 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 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 18:08:46,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-02-18 18:08:46,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:08:46,837 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:08:46,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:08:46,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1045562264, now seen corresponding path program 2 times [2023-02-18 18:08:46,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:08:46,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70860933] [2023-02-18 18:08:46,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:08:46,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:08:46,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:08:46,840 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:08:46,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-02-18 18:08:47,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:08:47,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:08:47,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 18:08:47,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:08:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-18 18:08:47,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:09:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-18 18:09:00,496 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:09:00,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70860933] [2023-02-18 18:09:00,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70860933] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:09:00,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:09:00,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2023-02-18 18:09:00,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448222092] [2023-02-18 18:09:00,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:09:00,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 18:09:00,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:09:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 18:09:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 18:09:00,498 INFO L87 Difference]: Start difference. First operand 239 states and 287 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 9 states have internal predecessors, (37), 5 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-18 18:09:20,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:09:27,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:09:30,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:09:32,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:09:36,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:09:40,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:09:47,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:09:51,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:09:54,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:09:59,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:10:09,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:10:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:10:12,003 INFO L93 Difference]: Finished difference Result 315 states and 384 transitions. [2023-02-18 18:10:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 18:10:12,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 9 states have internal predecessors, (37), 5 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 65 [2023-02-18 18:10:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:10:12,077 INFO L225 Difference]: With dead ends: 315 [2023-02-18 18:10:12,077 INFO L226 Difference]: Without dead ends: 253 [2023-02-18 18:10:12,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-02-18 18:10:12,078 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 21 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.5s IncrementalHoareTripleChecker+Time [2023-02-18 18:10:12,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 250 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 211 Invalid, 3 Unknown, 0 Unchecked, 58.5s Time] [2023-02-18 18:10:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-02-18 18:10:12,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2023-02-18 18:10:12,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 169 states have (on average 1.1479289940828403) internal successors, (194), 174 states have internal predecessors, (194), 49 states have call successors, (49), 32 states have call predecessors, (49), 31 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2023-02-18 18:10:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 288 transitions. [2023-02-18 18:10:12,114 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 288 transitions. Word has length 65 [2023-02-18 18:10:12,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:10:12,115 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 288 transitions. [2023-02-18 18:10:12,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 9 states have internal predecessors, (37), 5 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-18 18:10:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 288 transitions. [2023-02-18 18:10:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 18:10:12,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:10:12,117 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, 1, 1] [2023-02-18 18:10:12,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-02-18 18:10:12,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:10:12,321 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:10:12,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:10:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash -902942769, now seen corresponding path program 1 times [2023-02-18 18:10:12,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:10:12,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689457400] [2023-02-18 18:10:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:10:12,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:10:12,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:10:12,323 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:10:12,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-02-18 18:10:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:10:12,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 18:10:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:10:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-02-18 18:10:15,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:10:46,528 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ zero_extend 32) |c_ULTIMATE.start_main_~B~0#1|)) (.cse5 (bvsdiv |c_ULTIMATE.start_main_~p~0#1| (_ bv2 64)))) (let ((.cse0 (bvmul .cse3 .cse5))) (let ((.cse1 ((_ zero_extend 32) |c_ULTIMATE.start_main_~A~0#1|)) (.cse2 (bvadd |c_ULTIMATE.start_main_~q~0#1| .cse5)) (.cse4 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg .cse0)))) (or (not (= .cse0 (bvsdiv |c_ULTIMATE.start_main_~d~0#1| (_ bv2 64)))) (not (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse0)) (not (= .cse1 (bvadd (bvmul .cse2 .cse3) .cse4))) (= .cse1 (bvadd (bvmul .cse0 .cse2) .cse4)))))) is different from false [2023-02-18 18:10:49,873 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ zero_extend 32) |c_ULTIMATE.start_main_~B~0#1|)) (.cse5 (bvsdiv |c_ULTIMATE.start_main_~p~0#1| (_ bv2 64)))) (let ((.cse0 (bvmul .cse3 .cse5))) (let ((.cse1 ((_ zero_extend 32) |c_ULTIMATE.start_main_~A~0#1|)) (.cse2 (bvadd |c_ULTIMATE.start_main_~q~0#1| .cse5)) (.cse4 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg .cse0)))) (or (not (= .cse0 (bvsdiv |c_ULTIMATE.start_main_~d~0#1| (_ bv2 64)))) (not (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse0)) (not (= .cse1 (bvadd (bvmul .cse2 .cse3) .cse4))) (= .cse1 (bvadd (bvmul .cse0 .cse2) .cse4)))))) is different from true [2023-02-18 18:11:04,608 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ zero_extend 32) |c_ULTIMATE.start_main_~B~0#1|)) (.cse5 (bvsdiv |c_ULTIMATE.start_main_~p~0#1| (_ bv2 64)))) (let ((.cse0 (bvmul .cse3 .cse5))) (let ((.cse1 ((_ zero_extend 32) |c_ULTIMATE.start_main_~A~0#1|)) (.cse2 (bvadd |c_ULTIMATE.start_main_~q~0#1| .cse5)) (.cse4 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg .cse0)))) (or (not (= .cse0 (bvsdiv |c_ULTIMATE.start_main_~d~0#1| (_ bv2 64)))) (not (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse0)) (not (= .cse1 (bvadd (bvmul .cse2 .cse3) .cse4))) (bvsge |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~d~0#1|) (= .cse1 (bvadd (bvmul .cse0 .cse2) .cse4)))))) is different from false [2023-02-18 18:11:08,138 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ zero_extend 32) |c_ULTIMATE.start_main_~B~0#1|)) (.cse5 (bvsdiv |c_ULTIMATE.start_main_~p~0#1| (_ bv2 64)))) (let ((.cse0 (bvmul .cse3 .cse5))) (let ((.cse1 ((_ zero_extend 32) |c_ULTIMATE.start_main_~A~0#1|)) (.cse2 (bvadd |c_ULTIMATE.start_main_~q~0#1| .cse5)) (.cse4 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg .cse0)))) (or (not (= .cse0 (bvsdiv |c_ULTIMATE.start_main_~d~0#1| (_ bv2 64)))) (not (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse0)) (not (= .cse1 (bvadd (bvmul .cse2 .cse3) .cse4))) (bvsge |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~d~0#1|) (= .cse1 (bvadd (bvmul .cse0 .cse2) .cse4)))))) is different from true [2023-02-18 18:11:19,172 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ zero_extend 32) |c_ULTIMATE.start_main_~B~0#1|)) (.cse6 (bvsdiv (bvmul (_ bv2 64) |c_ULTIMATE.start_main_~p~0#1|) (_ bv2 64)))) (let ((.cse0 (bvmul .cse3 .cse6))) (let ((.cse1 ((_ zero_extend 32) |c_ULTIMATE.start_main_~A~0#1|)) (.cse2 (bvadd |c_ULTIMATE.start_main_~q~0#1| .cse6)) (.cse4 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg .cse0))) (.cse5 (bvmul (_ bv2 64) |c_ULTIMATE.start_main_~d~0#1|))) (or (not (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse0)) (not (= .cse1 (bvadd (bvmul .cse2 .cse3) .cse4))) (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse5) (= .cse1 (bvadd (bvmul .cse0 .cse2) .cse4)) (not (= .cse0 (bvsdiv .cse5 (_ bv2 64)))))))) is different from false [2023-02-18 18:11:22,289 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ zero_extend 32) |c_ULTIMATE.start_main_~B~0#1|)) (.cse6 (bvsdiv (bvmul (_ bv2 64) |c_ULTIMATE.start_main_~p~0#1|) (_ bv2 64)))) (let ((.cse0 (bvmul .cse3 .cse6))) (let ((.cse1 ((_ zero_extend 32) |c_ULTIMATE.start_main_~A~0#1|)) (.cse2 (bvadd |c_ULTIMATE.start_main_~q~0#1| .cse6)) (.cse4 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg .cse0))) (.cse5 (bvmul (_ bv2 64) |c_ULTIMATE.start_main_~d~0#1|))) (or (not (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse0)) (not (= .cse1 (bvadd (bvmul .cse2 .cse3) .cse4))) (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse5) (= .cse1 (bvadd (bvmul .cse0 .cse2) .cse4)) (not (= .cse0 (bvsdiv .cse5 (_ bv2 64)))))))) is different from true [2023-02-18 18:11:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 132 trivial. 11 not checked. [2023-02-18 18:11:41,045 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:11:41,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689457400] [2023-02-18 18:11:41,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689457400] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:11:41,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:11:41,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2023-02-18 18:11:41,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800265590] [2023-02-18 18:11:41,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:11:41,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 18:11:41,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:11:41,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 18:11:41,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=304, Unknown=6, NotChecked=114, Total=506 [2023-02-18 18:11:41,047 INFO L87 Difference]: Start difference. First operand 250 states and 288 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20) [2023-02-18 18:11:43,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:11:50,935 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ zero_extend 32) |c_ULTIMATE.start_main_~A~0#1|)) (.cse3 ((_ zero_extend 32) |c_ULTIMATE.start_main_~B~0#1|)) (.cse7 (bvuge |c_ULTIMATE.start_main_~B~0#1| (_ bv1 32)))) (and (= |c_ULTIMATE.start_main_~r~0#1| .cse0) (let ((.cse6 (bvsdiv (bvmul (_ bv2 64) |c_ULTIMATE.start_main_~p~0#1|) (_ bv2 64)))) (let ((.cse1 (bvmul .cse3 .cse6))) (let ((.cse2 (bvadd |c_ULTIMATE.start_main_~q~0#1| .cse6)) (.cse4 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg .cse1))) (.cse5 (bvmul (_ bv2 64) |c_ULTIMATE.start_main_~d~0#1|))) (or (not (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse1)) (not (= .cse0 (bvadd (bvmul .cse2 .cse3) .cse4))) (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse5) (= .cse0 (bvadd (bvmul .cse1 .cse2) .cse4)) (not (= .cse1 (bvsdiv .cse5 (_ bv2 64)))))))) .cse7 (= |c_ULTIMATE.start_main_~q~0#1| (_ bv0 64)) (= |c_ULTIMATE.start_main_~p~0#1| (_ bv1 64)) (= |c_ULTIMATE.start_main_~d~0#1| .cse3) (or (and (not .cse7) (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (and (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32)) .cse7)))) is different from true [2023-02-18 18:11:56,455 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ zero_extend 32) |c_ULTIMATE.start_main_~A~0#1|)) (.cse3 ((_ zero_extend 32) |c_ULTIMATE.start_main_~B~0#1|))) (and (= |c_ULTIMATE.start_main_~r~0#1| .cse0) (let ((.cse6 (bvsdiv (bvmul (_ bv2 64) |c_ULTIMATE.start_main_~p~0#1|) (_ bv2 64)))) (let ((.cse1 (bvmul .cse3 .cse6))) (let ((.cse2 (bvadd |c_ULTIMATE.start_main_~q~0#1| .cse6)) (.cse4 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg .cse1))) (.cse5 (bvmul (_ bv2 64) |c_ULTIMATE.start_main_~d~0#1|))) (or (not (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse1)) (not (= .cse0 (bvadd (bvmul .cse2 .cse3) .cse4))) (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse5) (= .cse0 (bvadd (bvmul .cse1 .cse2) .cse4)) (not (= .cse1 (bvsdiv .cse5 (_ bv2 64)))))))) (bvuge |c_ULTIMATE.start_main_~B~0#1| (_ bv1 32)) (= |c_ULTIMATE.start_main_~q~0#1| (_ bv0 64)) (= |c_ULTIMATE.start_main_~p~0#1| (_ bv1 64)) (= |c_ULTIMATE.start_main_~d~0#1| .cse3))) is different from true [2023-02-18 18:11:57,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:12:05,966 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ zero_extend 32) |c_ULTIMATE.start_main_~A~0#1|)) (.cse3 ((_ zero_extend 32) |c_ULTIMATE.start_main_~B~0#1|))) (and (= |c_ULTIMATE.start_main_~r~0#1| .cse0) (= |c_ULTIMATE.start_main_~p~0#1| (bvmul (_ bv2 64) (_ bv1 64))) (bvuge |c_ULTIMATE.start_main_~B~0#1| (_ bv1 32)) (= |c_ULTIMATE.start_main_~q~0#1| (_ bv0 64)) (let ((.cse5 (bvsdiv |c_ULTIMATE.start_main_~p~0#1| (_ bv2 64)))) (let ((.cse1 (bvmul .cse3 .cse5))) (let ((.cse2 (bvadd |c_ULTIMATE.start_main_~q~0#1| .cse5)) (.cse4 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg .cse1)))) (or (not (= .cse1 (bvsdiv |c_ULTIMATE.start_main_~d~0#1| (_ bv2 64)))) (not (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse1)) (not (= .cse0 (bvadd (bvmul .cse2 .cse3) .cse4))) (bvsge |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~d~0#1|) (= .cse0 (bvadd (bvmul .cse1 .cse2) .cse4)))))) (= |c_ULTIMATE.start_main_~d~0#1| (bvmul (_ bv2 64) .cse3)))) is different from true [2023-02-18 18:12:10,267 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ zero_extend 32) |c_ULTIMATE.start_main_~A~0#1|)) (.cse3 ((_ zero_extend 32) |c_ULTIMATE.start_main_~B~0#1|))) (and (= |c_ULTIMATE.start_main_~r~0#1| .cse0) (= |c_ULTIMATE.start_main_~p~0#1| (bvmul (_ bv2 64) (_ bv1 64))) (let ((.cse5 (bvsdiv |c_ULTIMATE.start_main_~p~0#1| (_ bv2 64)))) (let ((.cse1 (bvmul .cse3 .cse5))) (let ((.cse2 (bvadd |c_ULTIMATE.start_main_~q~0#1| .cse5)) (.cse4 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg .cse1)))) (or (not (= .cse1 (bvsdiv |c_ULTIMATE.start_main_~d~0#1| (_ bv2 64)))) (not (bvsge |c_ULTIMATE.start_main_~r~0#1| .cse1)) (not (= .cse0 (bvadd (bvmul .cse2 .cse3) .cse4))) (= .cse0 (bvadd (bvmul .cse1 .cse2) .cse4)))))) (bvuge |c_ULTIMATE.start_main_~B~0#1| (_ bv1 32)) (= |c_ULTIMATE.start_main_~q~0#1| (_ bv0 64)) (not (bvsge |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~d~0#1|)) (= |c_ULTIMATE.start_main_~d~0#1| (bvmul (_ bv2 64) .cse3)))) is different from true [2023-02-18 18:12:17,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:12:24,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:12:47,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:12:49,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:12:53,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:12:55,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:13:03,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:13:08,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:13:11,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:13:13,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:13:17,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:13:19,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:13:21,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:13:33,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:13:36,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:13:39,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []