./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/prodbin-ll_valuebound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 02:23:45,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 02:23:45,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 02:23:45,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 02:23:45,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 02:23:45,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 02:23:45,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 02:23:45,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 02:23:45,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 02:23:45,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 02:23:45,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 02:23:45,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 02:23:45,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 02:23:45,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 02:23:45,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 02:23:45,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 02:23:45,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 02:23:45,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 02:23:45,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 02:23:45,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 02:23:45,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 02:23:45,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 02:23:45,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 02:23:45,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 02:23:45,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 02:23:45,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 02:23:45,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 02:23:45,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 02:23:45,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 02:23:45,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 02:23:45,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 02:23:45,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 02:23:45,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 02:23:45,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 02:23:45,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 02:23:45,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 02:23:45,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 02:23:45,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 02:23:45,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 02:23:45,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 02:23:45,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 02:23:45,872 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 02:23:45,895 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 02:23:45,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 02:23:45,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 02:23:45,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 02:23:45,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 02:23:45,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 02:23:45,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 02:23:45,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 02:23:45,897 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 02:23:45,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 02:23:45,898 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 02:23:45,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 02:23:45,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 02:23:45,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 02:23:45,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 02:23:45,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 02:23:45,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 02:23:45,899 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 02:23:45,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 02:23:45,899 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 02:23:45,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 02:23:45,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 02:23:45,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 02:23:45,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 02:23:45,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:23:45,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 02:23:45,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 02:23:45,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 02:23:45,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 02:23:45,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 02:23:45,900 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 02:23:45,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 02:23:45,901 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 02:23:45,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 02:23:45,901 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 02:23:45,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 [2023-02-17 02:23:46,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 02:23:46,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 02:23:46,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 02:23:46,158 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 02:23:46,158 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 02:23:46,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2023-02-17 02:23:47,125 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 02:23:47,286 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 02:23:47,286 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2023-02-17 02:23:47,290 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bef1217d/bea1a8fdaae5475d8d35a3f8d84034d3/FLAG385dada0d [2023-02-17 02:23:47,305 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bef1217d/bea1a8fdaae5475d8d35a3f8d84034d3 [2023-02-17 02:23:47,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 02:23:47,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 02:23:47,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 02:23:47,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 02:23:47,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 02:23:47,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b54e1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47, skipping insertion in model container [2023-02-17 02:23:47,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 02:23:47,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 02:23:47,410 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/prodbin-ll_valuebound100.c[537,550] [2023-02-17 02:23:47,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:23:47,424 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 02:23:47,431 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/prodbin-ll_valuebound100.c[537,550] [2023-02-17 02:23:47,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:23:47,442 INFO L208 MainTranslator]: Completed translation [2023-02-17 02:23:47,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47 WrapperNode [2023-02-17 02:23:47,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 02:23:47,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 02:23:47,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 02:23:47,443 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 02:23:47,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,460 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-17 02:23:47,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 02:23:47,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 02:23:47,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 02:23:47,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 02:23:47,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,485 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 02:23:47,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 02:23:47,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 02:23:47,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 02:23:47,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47" (1/1) ... [2023-02-17 02:23:47,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:23:47,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:23:47,535 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) [2023-02-17 02:23:47,541 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 [2023-02-17 02:23:47,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 02:23:47,564 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-17 02:23:47,564 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-17 02:23:47,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 02:23:47,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 02:23:47,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 02:23:47,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 02:23:47,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 02:23:47,607 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 02:23:47,610 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 02:23:47,751 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 02:23:47,755 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 02:23:47,755 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 02:23:47,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:23:47 BoogieIcfgContainer [2023-02-17 02:23:47,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 02:23:47,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 02:23:47,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 02:23:47,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 02:23:47,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 02:23:47" (1/3) ... [2023-02-17 02:23:47,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f0d29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:23:47, skipping insertion in model container [2023-02-17 02:23:47,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:23:47" (2/3) ... [2023-02-17 02:23:47,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f0d29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:23:47, skipping insertion in model container [2023-02-17 02:23:47,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:23:47" (3/3) ... [2023-02-17 02:23:47,796 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound100.c [2023-02-17 02:23:47,810 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 02:23:47,811 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 02:23:47,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 02:23:47,856 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;@62ecbd11, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 02:23:47,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 02:23:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 02:23:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 02:23:47,864 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:23:47,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:23:47,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:23:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:23:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash -861605892, now seen corresponding path program 1 times [2023-02-17 02:23:47,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:23:47,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363328185] [2023-02-17 02:23:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:47,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:23:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:23:47,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:23:47,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363328185] [2023-02-17 02:23:47,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 02:23:47,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32744567] [2023-02-17 02:23:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:47,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:23:47,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:23:47,989 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) [2023-02-17 02:23:47,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 02:23:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:23:48,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 02:23:48,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:23:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 02:23:48,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:23:48,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32744567] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:23:48,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:23:48,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:23:48,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485107562] [2023-02-17 02:23:48,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:23:48,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 02:23:48,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:23:48,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 02:23:48,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:23:48,120 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 02:23:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:23:48,140 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2023-02-17 02:23:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 02:23:48,143 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-02-17 02:23:48,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:23:48,149 INFO L225 Difference]: With dead ends: 51 [2023-02-17 02:23:48,149 INFO L226 Difference]: Without dead ends: 23 [2023-02-17 02:23:48,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:23:48,154 INFO L413 NwaCegarLoop]: 31 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, 31 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 [2023-02-17 02:23:48,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:23:48,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-17 02:23:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-17 02:23:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 02:23:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-17 02:23:48,181 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 24 [2023-02-17 02:23:48,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:23:48,181 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-17 02:23:48,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 02:23:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-17 02:23:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 02:23:48,184 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:23:48,184 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:23:48,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 02:23:48,389 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 [2023-02-17 02:23:48,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:23:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:23:48,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2010313222, now seen corresponding path program 1 times [2023-02-17 02:23:48,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:23:48,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499557890] [2023-02-17 02:23:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:48,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:23:48,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:23:48,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812871004] [2023-02-17 02:23:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:48,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:23:48,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:23:48,429 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) [2023-02-17 02:23:48,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 02:23:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:23:48,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 02:23:48,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:23:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 02:23:48,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:23:48,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:23:48,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499557890] [2023-02-17 02:23:48,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:23:48,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812871004] [2023-02-17 02:23:48,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812871004] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:23:48,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:23:48,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:23:48,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657304357] [2023-02-17 02:23:48,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:23:48,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:23:48,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:23:48,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:23:48,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:23:48,506 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-02-17 02:23:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:23:48,547 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-02-17 02:23:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:23:48,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 24 [2023-02-17 02:23:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:23:48,548 INFO L225 Difference]: With dead ends: 35 [2023-02-17 02:23:48,548 INFO L226 Difference]: Without dead ends: 33 [2023-02-17 02:23:48,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:23:48,549 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:23:48,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:23:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-17 02:23:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-02-17 02:23:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 02:23:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-02-17 02:23:48,555 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2023-02-17 02:23:48,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:23:48,556 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-02-17 02:23:48,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-02-17 02:23:48,556 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-02-17 02:23:48,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 02:23:48,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:23:48,557 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:23:48,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 02:23:48,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-17 02:23:48,762 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:23:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:23:48,763 INFO L85 PathProgramCache]: Analyzing trace with hash -895979555, now seen corresponding path program 1 times [2023-02-17 02:23:48,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:23:48,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815709789] [2023-02-17 02:23:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:48,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:23:48,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:23:48,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491074545] [2023-02-17 02:23:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:48,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:23:48,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:23:48,794 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) [2023-02-17 02:23:48,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 02:23:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:23:48,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 02:23:48,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:23:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 02:23:48,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 02:23:48,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:23:48,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815709789] [2023-02-17 02:23:48,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:23:48,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491074545] [2023-02-17 02:23:48,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491074545] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:23:48,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:23:48,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 02:23:48,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925440069] [2023-02-17 02:23:48,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:23:48,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:23:48,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:23:48,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:23:48,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:23:48,933 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 02:23:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:23:48,977 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-02-17 02:23:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:23:48,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-02-17 02:23:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:23:48,978 INFO L225 Difference]: With dead ends: 39 [2023-02-17 02:23:48,978 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 02:23:48,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:23:48,980 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:23:48,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 69 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:23:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 02:23:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-02-17 02:23:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 02:23:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-02-17 02:23:48,998 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 30 [2023-02-17 02:23:48,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:23:48,999 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-02-17 02:23:48,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 02:23:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-02-17 02:23:49,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 02:23:49,000 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:23:49,000 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:23:49,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 02:23:49,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:23:49,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:23:49,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:23:49,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1371702355, now seen corresponding path program 1 times [2023-02-17 02:23:49,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:23:49,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258378343] [2023-02-17 02:23:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:49,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:23:49,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:23:49,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597051840] [2023-02-17 02:23:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:49,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:23:49,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:23:49,225 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) [2023-02-17 02:23:49,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 02:23:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:23:49,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-17 02:23:49,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:23:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 02:23:49,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:23:54,787 WARN L859 $PredicateComparison]: unable to prove that (or (let ((.cse3 (+ (- 1) |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse1 (= (mod (+ |c_ULTIMATE.start_main_~b~0#1| 1) 2) 0)) (.cse2 (< .cse3 0)) (.cse0 (div .cse3 2))) (and (or (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (= (+ (* .cse0 (* 2 |ULTIMATE.start_main_~a~0#1|)) (+ |ULTIMATE.start_main_~a~0#1| 0)) (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (and (not .cse1) .cse2)) (or .cse1 (not .cse2) (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (= (+ (* (+ .cse0 1) (* 2 |ULTIMATE.start_main_~a~0#1|)) (+ |ULTIMATE.start_main_~a~0#1| 0)) (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))))))) (let ((.cse5 (mod |c_ULTIMATE.start_main_~b~0#1| 2))) (let ((.cse4 (= .cse5 0)) (.cse6 (< |c_ULTIMATE.start_main_~b~0#1| 0))) (and (or .cse4 (not (>= (+ (- 2) .cse5) 1)) (not .cse6)) (or (and (not .cse4) .cse6) (not (>= .cse5 1))))))) is different from true [2023-02-17 02:23:54,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:23:54,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258378343] [2023-02-17 02:23:54,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:23:54,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597051840] [2023-02-17 02:23:54,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597051840] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:23:54,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 02:23:54,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-02-17 02:23:54,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734244450] [2023-02-17 02:23:54,801 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 02:23:54,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 02:23:54,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:23:54,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 02:23:54,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-02-17 02:23:54,804 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 02:23:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:23:55,098 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-02-17 02:23:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:23:55,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2023-02-17 02:23:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:23:55,099 INFO L225 Difference]: With dead ends: 45 [2023-02-17 02:23:55,099 INFO L226 Difference]: Without dead ends: 43 [2023-02-17 02:23:55,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=44, Invalid=141, Unknown=1, NotChecked=24, Total=210 [2023-02-17 02:23:55,100 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:23:55,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 98 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:23:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-17 02:23:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2023-02-17 02:23:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 02:23:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-02-17 02:23:55,112 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 33 [2023-02-17 02:23:55,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:23:55,112 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-02-17 02:23:55,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 02:23:55,113 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-02-17 02:23:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 02:23:55,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:23:55,115 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:23:55,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 02:23:55,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:23:55,316 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:23:55,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:23:55,316 INFO L85 PathProgramCache]: Analyzing trace with hash 403305007, now seen corresponding path program 1 times [2023-02-17 02:23:55,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:23:55,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911806503] [2023-02-17 02:23:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:55,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:23:55,330 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:23:55,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921114464] [2023-02-17 02:23:55,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:55,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:23:55,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:23:55,345 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) [2023-02-17 02:23:55,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 02:23:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:23:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-17 02:23:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:23:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 02:23:55,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:23:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 02:23:55,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:23:55,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911806503] [2023-02-17 02:23:55,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:23:55,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921114464] [2023-02-17 02:23:55,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921114464] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:23:55,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:23:55,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-02-17 02:23:55,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27138402] [2023-02-17 02:23:55,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:23:55,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 02:23:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:23:55,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 02:23:55,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-17 02:23:55,743 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 02:23:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:23:56,315 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2023-02-17 02:23:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 02:23:56,315 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2023-02-17 02:23:56,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:23:56,317 INFO L225 Difference]: With dead ends: 66 [2023-02-17 02:23:56,318 INFO L226 Difference]: Without dead ends: 59 [2023-02-17 02:23:56,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-02-17 02:23:56,319 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 02:23:56,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 97 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 02:23:56,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-17 02:23:56,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2023-02-17 02:23:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 02:23:56,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2023-02-17 02:23:56,341 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 33 [2023-02-17 02:23:56,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:23:56,341 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2023-02-17 02:23:56,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 02:23:56,342 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2023-02-17 02:23:56,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 02:23:56,342 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:23:56,343 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:23:56,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 02:23:56,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:23:56,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:23:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:23:56,548 INFO L85 PathProgramCache]: Analyzing trace with hash 685673296, now seen corresponding path program 1 times [2023-02-17 02:23:56,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:23:56,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650013570] [2023-02-17 02:23:56,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:56,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:23:56,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:23:56,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664968807] [2023-02-17 02:23:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:56,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:23:56,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:23:56,558 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) [2023-02-17 02:23:56,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 02:23:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:23:56,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 02:23:56,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:23:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 02:23:56,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:23:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 02:23:56,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:23:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650013570] [2023-02-17 02:23:56,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:23:56,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664968807] [2023-02-17 02:23:56,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664968807] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:23:56,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:23:56,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-17 02:23:56,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117967489] [2023-02-17 02:23:56,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:23:56,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 02:23:56,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:23:56,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 02:23:56,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-17 02:23:56,651 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-17 02:23:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:23:56,763 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2023-02-17 02:23:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:23:56,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-02-17 02:23:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:23:56,764 INFO L225 Difference]: With dead ends: 65 [2023-02-17 02:23:56,764 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 02:23:56,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-02-17 02:23:56,765 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:23:56,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 127 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:23:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 02:23:56,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2023-02-17 02:23:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 02:23:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2023-02-17 02:23:56,772 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 39 [2023-02-17 02:23:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:23:56,773 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2023-02-17 02:23:56,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-17 02:23:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2023-02-17 02:23:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 02:23:56,774 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:23:56,774 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:23:56,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 02:23:56,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:23:56,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:23:56,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:23:56,982 INFO L85 PathProgramCache]: Analyzing trace with hash -662815268, now seen corresponding path program 1 times [2023-02-17 02:23:56,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:23:56,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064461391] [2023-02-17 02:23:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:56,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:23:57,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:23:57,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993283379] [2023-02-17 02:23:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:23:57,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:23:57,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:23:57,013 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) [2023-02-17 02:23:57,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 02:23:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:23:57,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 02:23:57,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:24:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 02:24:02,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:24:18,436 WARN L859 $PredicateComparison]: unable to prove that (or (let ((.cse1 (mod |c_ULTIMATE.start_main_~y~0#1| 2))) (let ((.cse2 (< |c_ULTIMATE.start_main_~y~0#1| 0)) (.cse0 (= .cse1 0))) (and (or .cse0 (not (>= (+ (- 2) .cse1) 1)) (not .cse2)) (or (not (>= .cse1 1)) (and .cse2 (not .cse0)))))) (let ((.cse15 (+ (- 1) |c_ULTIMATE.start_main_~y~0#1|)) (.cse14 (* |c_ULTIMATE.start_main_~x~0#1| 2))) (let ((.cse7 (= (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 2) 0)) (.cse10 (* 2 .cse14)) (.cse9 (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse6 (< .cse15 0)) (.cse13 (div .cse15 2))) (and (let ((.cse3 (mod .cse13 2)) (.cse8 (< .cse13 0))) (let ((.cse4 (not .cse8)) (.cse5 (= .cse3 0))) (or (and (= .cse3 1) (or .cse4 .cse5)) (and .cse6 (not .cse7)) (let ((.cse11 (div .cse15 4)) (.cse12 (+ (* (- 1) .cse13 .cse14) .cse9))) (and (or (and (not .cse5) .cse8) (= .cse9 (+ (* .cse10 .cse11) .cse12))) (or .cse4 .cse5 (= (+ (* (+ .cse11 1) .cse10) .cse12) .cse9))))))) (let ((.cse21 (+ .cse13 1))) (let ((.cse22 (mod .cse21 2)) (.cse17 (< .cse21 0))) (let ((.cse20 (not .cse17)) (.cse16 (= .cse22 0))) (or .cse7 (let ((.cse19 (div .cse21 2)) (.cse18 (+ (* (- 1) .cse21 .cse14) .cse9))) (and (or (and (not .cse16) .cse17) (= .cse9 (+ .cse18 (* .cse19 .cse10)))) (or .cse20 (= (+ (* (+ .cse19 1) .cse10) .cse18) .cse9) .cse16))) (not .cse6) (and (= .cse22 1) (or .cse20 .cse16)))))))))) is different from true [2023-02-17 02:24:20,452 WARN L859 $PredicateComparison]: unable to prove that (or (let ((.cse1 (mod |c_ULTIMATE.start_main_~y~0#1| 2))) (let ((.cse2 (< |c_ULTIMATE.start_main_~y~0#1| 0)) (.cse0 (= .cse1 0))) (and (or .cse0 (not (>= (+ (- 2) .cse1) 1)) (not .cse2)) (or (not (>= .cse1 1)) (and .cse2 (not .cse0)))))) (let ((.cse15 (+ (- 1) |c_ULTIMATE.start_main_~y~0#1|)) (.cse14 (* |c_ULTIMATE.start_main_~x~0#1| 2))) (let ((.cse7 (= (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 2) 0)) (.cse10 (* 2 .cse14)) (.cse9 (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse6 (< .cse15 0)) (.cse13 (div .cse15 2))) (and (let ((.cse3 (mod .cse13 2)) (.cse8 (< .cse13 0))) (let ((.cse4 (not .cse8)) (.cse5 (= .cse3 0))) (or (and (= .cse3 1) (or .cse4 .cse5)) (and .cse6 (not .cse7)) (let ((.cse11 (div .cse15 4)) (.cse12 (+ (* (- 1) .cse13 .cse14) .cse9))) (and (or (and (not .cse5) .cse8) (= .cse9 (+ (* .cse10 .cse11) .cse12))) (or .cse4 .cse5 (= (+ (* (+ .cse11 1) .cse10) .cse12) .cse9))))))) (let ((.cse21 (+ .cse13 1))) (let ((.cse22 (mod .cse21 2)) (.cse17 (< .cse21 0))) (let ((.cse20 (not .cse17)) (.cse16 (= .cse22 0))) (or .cse7 (let ((.cse19 (div .cse21 2)) (.cse18 (+ (* (- 1) .cse21 .cse14) .cse9))) (and (or (and (not .cse16) .cse17) (= .cse9 (+ .cse18 (* .cse19 .cse10)))) (or .cse20 (= (+ (* (+ .cse19 1) .cse10) .cse18) .cse9) .cse16))) (not .cse6) (and (= .cse22 1) (or .cse20 .cse16))))))))) (= |c_ULTIMATE.start_main_~y~0#1| 0)) is different from true [2023-02-17 02:24:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 6 not checked. [2023-02-17 02:24:22,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:24:22,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064461391] [2023-02-17 02:24:22,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 02:24:22,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993283379] [2023-02-17 02:24:22,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993283379] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:24:22,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 02:24:22,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2023-02-17 02:24:22,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10804276] [2023-02-17 02:24:22,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 02:24:22,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 02:24:22,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:24:22,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 02:24:22,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=318, Unknown=5, NotChecked=74, Total=462 [2023-02-17 02:24:22,266 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-17 02:24:23,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:24:30,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:24:35,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:24:37,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:24:40,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:24:42,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:24:46,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:24:48,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:24:51,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:24:53,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 02:24:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:24:53,203 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2023-02-17 02:24:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 02:24:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 42 [2023-02-17 02:24:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:24:53,206 INFO L225 Difference]: With dead ends: 87 [2023-02-17 02:24:53,206 INFO L226 Difference]: Without dead ends: 85 [2023-02-17 02:24:53,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=153, Invalid=779, Unknown=6, NotChecked=118, Total=1056 [2023-02-17 02:24:53,207 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 32 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:24:53,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 169 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 288 Invalid, 3 Unknown, 99 Unchecked, 21.0s Time] [2023-02-17 02:24:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-17 02:24:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2023-02-17 02:24:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 02:24:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2023-02-17 02:24:53,218 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 42 [2023-02-17 02:24:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:24:53,218 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2023-02-17 02:24:53,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-17 02:24:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2023-02-17 02:24:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-17 02:24:53,220 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:24:53,220 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:24:53,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 02:24:53,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:24:53,439 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 02:24:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:24:53,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1448142086, now seen corresponding path program 2 times [2023-02-17 02:24:53,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:24:53,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743533344] [2023-02-17 02:24:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:24:53,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:24:53,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 02:24:53,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404971427] [2023-02-17 02:24:53,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 02:24:53,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:24:53,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:24:53,488 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) [2023-02-17 02:24:53,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 02:24:53,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 02:24:53,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 02:24:53,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-17 02:24:53,537 INFO L286 TraceCheckSpWp]: Computing forward predicates...