./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.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 a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 07:48:05,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 07:48:05,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 07:48:06,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 07:48:06,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 07:48:06,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 07:48:06,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 07:48:06,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 07:48:06,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 07:48:06,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 07:48:06,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 07:48:06,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 07:48:06,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 07:48:06,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 07:48:06,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 07:48:06,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 07:48:06,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 07:48:06,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 07:48:06,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 07:48:06,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 07:48:06,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 07:48:06,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 07:48:06,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 07:48:06,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 07:48:06,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 07:48:06,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 07:48:06,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 07:48:06,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 07:48:06,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 07:48:06,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 07:48:06,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 07:48:06,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 07:48:06,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 07:48:06,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 07:48:06,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 07:48:06,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 07:48:06,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 07:48:06,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 07:48:06,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 07:48:06,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 07:48:06,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 07:48:06,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 07:48:06,087 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 07:48:06,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 07:48:06,088 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 07:48:06,093 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 07:48:06,094 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 07:48:06,094 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 07:48:06,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 07:48:06,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 07:48:06,095 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 07:48:06,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 07:48:06,096 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 07:48:06,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 07:48:06,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 07:48:06,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 07:48:06,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 07:48:06,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 07:48:06,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 07:48:06,097 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 07:48:06,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 07:48:06,097 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 07:48:06,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 07:48:06,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 07:48:06,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 07:48:06,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 07:48:06,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:48:06,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 07:48:06,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 07:48:06,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 07:48:06,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 07:48:06,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 07:48:06,098 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 07:48:06,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 07:48:06,099 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 07:48:06,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 07:48:06,099 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 07:48:06,099 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 [2023-02-17 07:48:06,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 07:48:06,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 07:48:06,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 07:48:06,313 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 07:48:06,313 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 07:48:06,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2023-02-17 07:48:07,269 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 07:48:07,429 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 07:48:07,430 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2023-02-17 07:48:07,434 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02517b85/688f0d8b16aa4f32bfe3c56cfb99cc33/FLAG8fc03b96f [2023-02-17 07:48:07,447 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02517b85/688f0d8b16aa4f32bfe3c56cfb99cc33 [2023-02-17 07:48:07,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 07:48:07,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 07:48:07,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 07:48:07,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 07:48:07,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 07:48:07,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11501cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07, skipping insertion in model container [2023-02-17 07:48:07,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 07:48:07,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 07:48:07,560 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_valuebound20.c[537,550] [2023-02-17 07:48:07,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:48:07,575 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 07:48:07,584 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_valuebound20.c[537,550] [2023-02-17 07:48:07,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:48:07,601 INFO L208 MainTranslator]: Completed translation [2023-02-17 07:48:07,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07 WrapperNode [2023-02-17 07:48:07,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 07:48:07,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 07:48:07,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 07:48:07,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 07:48:07,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,624 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-17 07:48:07,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 07:48:07,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 07:48:07,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 07:48:07,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 07:48:07,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,654 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 07:48:07,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 07:48:07,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 07:48:07,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 07:48:07,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07" (1/1) ... [2023-02-17 07:48:07,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:48:07,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:48:07,689 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 07:48:07,694 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 07:48:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 07:48:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-17 07:48:07,727 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-17 07:48:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 07:48:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 07:48:07,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 07:48:07,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 07:48:07,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 07:48:07,771 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 07:48:07,774 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 07:48:07,925 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 07:48:07,930 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 07:48:07,930 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 07:48:07,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:48:07 BoogieIcfgContainer [2023-02-17 07:48:07,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 07:48:07,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 07:48:07,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 07:48:07,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 07:48:07,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:48:07" (1/3) ... [2023-02-17 07:48:07,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffab200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:48:07, skipping insertion in model container [2023-02-17 07:48:07,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:48:07" (2/3) ... [2023-02-17 07:48:07,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffab200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:48:07, skipping insertion in model container [2023-02-17 07:48:07,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:48:07" (3/3) ... [2023-02-17 07:48:07,950 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.c [2023-02-17 07:48:07,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 07:48:07,973 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 07:48:08,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 07:48:08,028 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;@44f6a0b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 07:48:08,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 07:48:08,048 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 07:48:08,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 07:48:08,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:48:08,054 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 07:48:08,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:48:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:48:08,058 INFO L85 PathProgramCache]: Analyzing trace with hash -861605892, now seen corresponding path program 1 times [2023-02-17 07:48:08,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:48:08,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637422593] [2023-02-17 07:48:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:48:08,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:48:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:48:08,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:48:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637422593] [2023-02-17 07:48:08,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 07:48:08,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004072633] [2023-02-17 07:48:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:48:08,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:48:08,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:48:08,186 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 07:48:08,188 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 07:48:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:48:08,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 07:48:08,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:48:08,306 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 07:48:08,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:48:08,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004072633] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:48:08,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:48:08,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 07:48:08,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147167163] [2023-02-17 07:48:08,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:48:08,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 07:48:08,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:48:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 07:48:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:48:08,339 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 07:48:08,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:48:08,355 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2023-02-17 07:48:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 07:48:08,357 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 07:48:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:48:08,361 INFO L225 Difference]: With dead ends: 51 [2023-02-17 07:48:08,361 INFO L226 Difference]: Without dead ends: 23 [2023-02-17 07:48:08,363 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 07:48:08,366 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 07:48:08,367 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 07:48:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-17 07:48:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-17 07:48:08,390 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 07:48:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-17 07:48:08,392 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 24 [2023-02-17 07:48:08,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:48:08,392 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-17 07:48:08,393 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 07:48:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-17 07:48:08,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 07:48:08,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:48:08,395 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 07:48:08,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 07:48:08,602 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 07:48:08,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:48:08,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:48:08,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2010313222, now seen corresponding path program 1 times [2023-02-17 07:48:08,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:48:08,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385067111] [2023-02-17 07:48:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:48:08,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:48:08,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:48:08,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269838533] [2023-02-17 07:48:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:48:08,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:48:08,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:48:08,627 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 07:48:08,630 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 07:48:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:48:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 07:48:08,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:48:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 07:48:08,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:48:08,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:48:08,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385067111] [2023-02-17 07:48:08,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:48:08,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269838533] [2023-02-17 07:48:08,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269838533] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:48:08,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:48:08,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 07:48:08,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496190562] [2023-02-17 07:48:08,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:48:08,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 07:48:08,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:48:08,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 07:48:08,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-17 07:48:08,762 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 07:48:08,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:48:08,865 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-02-17 07:48:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 07:48:08,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-02-17 07:48:08,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:48:08,867 INFO L225 Difference]: With dead ends: 39 [2023-02-17 07:48:08,867 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 07:48:08,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-17 07:48:08,869 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:48:08,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 81 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:48:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 07:48:08,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-02-17 07:48:08,876 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 07:48:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-02-17 07:48:08,878 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 24 [2023-02-17 07:48:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:48:08,879 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-02-17 07:48:08,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 07:48:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-02-17 07:48:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 07:48:08,881 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:48:08,881 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 07:48:08,888 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 07:48:09,086 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 07:48:09,086 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:48:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:48:09,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1371702355, now seen corresponding path program 1 times [2023-02-17 07:48:09,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:48:09,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397901129] [2023-02-17 07:48:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:48:09,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:48:09,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:48:09,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780948150] [2023-02-17 07:48:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:48:09,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:48:09,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:48:09,124 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 07:48:09,133 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 07:48:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:48:09,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-17 07:48:09,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:48:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 07:48:09,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:48:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 07:48:09,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:48:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397901129] [2023-02-17 07:48:09,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:48:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780948150] [2023-02-17 07:48:09,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780948150] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:48:09,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:48:09,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-02-17 07:48:09,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421203414] [2023-02-17 07:48:09,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:48:09,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 07:48:09,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:48:09,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 07:48:09,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-02-17 07:48:09,992 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 15 states have internal predecessors, (31), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 07:48:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:48:10,613 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2023-02-17 07:48:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 07:48:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 15 states have internal predecessors, (31), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 33 [2023-02-17 07:48:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:48:10,615 INFO L225 Difference]: With dead ends: 48 [2023-02-17 07:48:10,615 INFO L226 Difference]: Without dead ends: 46 [2023-02-17 07:48:10,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-02-17 07:48:10,616 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 07:48:10,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 99 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 07:48:10,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-17 07:48:10,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2023-02-17 07:48:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 07:48:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-02-17 07:48:10,627 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 33 [2023-02-17 07:48:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:48:10,628 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-02-17 07:48:10,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 15 states have internal predecessors, (31), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 07:48:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-02-17 07:48:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 07:48:10,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:48:10,630 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 07:48:10,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 07:48:10,837 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 07:48:10,838 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:48:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:48:10,839 INFO L85 PathProgramCache]: Analyzing trace with hash 685673296, now seen corresponding path program 1 times [2023-02-17 07:48:10,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:48:10,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764902348] [2023-02-17 07:48:10,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:48:10,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:48:10,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:48:10,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410813881] [2023-02-17 07:48:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:48:10,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:48:10,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:48:10,867 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 07:48:10,869 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 07:48:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:48:10,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 07:48:10,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:48:10,950 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 07:48:10,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:48:10,999 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 07:48:11,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:48:11,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764902348] [2023-02-17 07:48:11,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:48:11,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410813881] [2023-02-17 07:48:11,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410813881] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:48:11,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:48:11,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-17 07:48:11,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468165114] [2023-02-17 07:48:11,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:48:11,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 07:48:11,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:48:11,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 07:48:11,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-17 07:48:11,002 INFO L87 Difference]: Start difference. First operand 43 states and 51 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 07:48:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:48:11,104 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-02-17 07:48:11,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 07:48:11,105 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 07:48:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:48:11,106 INFO L225 Difference]: With dead ends: 50 [2023-02-17 07:48:11,106 INFO L226 Difference]: Without dead ends: 43 [2023-02-17 07:48:11,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-02-17 07:48:11,107 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:48:11,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 139 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:48:11,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-17 07:48:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2023-02-17 07:48:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 07:48:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-02-17 07:48:11,114 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 39 [2023-02-17 07:48:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:48:11,114 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-02-17 07:48:11,114 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 07:48:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-02-17 07:48:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 07:48:11,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:48:11,115 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:48:11,122 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 07:48:11,322 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 07:48:11,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:48:11,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:48:11,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1683883622, now seen corresponding path program 1 times [2023-02-17 07:48:11,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:48:11,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155400529] [2023-02-17 07:48:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:48:11,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:48:11,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:48:11,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948358309] [2023-02-17 07:48:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:48:11,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:48:11,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:48:11,335 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 07:48:11,357 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 07:48:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:48:11,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-17 07:48:11,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:48:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 07:48:12,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:48:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 07:48:45,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:48:45,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155400529] [2023-02-17 07:48:45,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:48:45,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948358309] [2023-02-17 07:48:45,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948358309] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:48:45,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:48:45,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2023-02-17 07:48:45,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157178175] [2023-02-17 07:48:45,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:48:45,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 07:48:45,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:48:45,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 07:48:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=418, Unknown=2, NotChecked=0, Total=506 [2023-02-17 07:48:45,101 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-17 07:48:50,055 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 [1] [2023-02-17 07:48:51,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:48:53,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-17 07:48:58,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-17 07:49:08,278 WARN L539 Checker$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 07:49:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:49:14,353 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2023-02-17 07:49:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 07:49:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 42 [2023-02-17 07:49:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:49:14,379 INFO L225 Difference]: With dead ends: 81 [2023-02-17 07:49:14,379 INFO L226 Difference]: Without dead ends: 79 [2023-02-17 07:49:14,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=226, Invalid=960, Unknown=4, NotChecked=0, Total=1190 [2023-02-17 07:49:14,380 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 38 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2023-02-17 07:49:14,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 130 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 416 Invalid, 2 Unknown, 0 Unchecked, 18.3s Time] [2023-02-17 07:49:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-17 07:49:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-02-17 07:49:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 62 states have internal predecessors, (66), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 07:49:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2023-02-17 07:49:14,399 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 42 [2023-02-17 07:49:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:49:14,400 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2023-02-17 07:49:14,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-17 07:49:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2023-02-17 07:49:14,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 07:49:14,406 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:49:14,406 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:49:14,411 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 07:49:14,607 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 07:49:14,607 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:49:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:49:14,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1217167219, now seen corresponding path program 1 times [2023-02-17 07:49:14,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:49:14,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042418171] [2023-02-17 07:49:14,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:49:14,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:49:14,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:49:14,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485628515] [2023-02-17 07:49:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:49:14,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:49:14,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:49:14,629 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 07:49:14,637 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 07:49:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:49:14,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-17 07:49:14,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:49:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 07:49:18,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:49:58,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:49:58,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042418171] [2023-02-17 07:49:58,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:49:58,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485628515] [2023-02-17 07:49:58,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485628515] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:49:58,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:49:58,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-17 07:49:58,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828739927] [2023-02-17 07:49:58,373 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:49:58,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 07:49:58,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:49:58,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 07:49:58,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=536, Unknown=9, NotChecked=0, Total=650 [2023-02-17 07:49:58,374 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 07:50:02,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:50:04,605 WARN L539 Checker$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 07:50:06,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:50:08,611 WARN L539 Checker$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 07:50:10,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:50:12,474 WARN L539 Checker$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 07:50:14,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:50:16,478 WARN L539 Checker$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 07:50:17,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:50:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:50:19,105 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2023-02-17 07:50:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 07:50:19,105 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2023-02-17 07:50:19,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:50:19,106 INFO L225 Difference]: With dead ends: 97 [2023-02-17 07:50:19,106 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 07:50:19,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=124, Invalid=679, Unknown=9, NotChecked=0, Total=812 [2023-02-17 07:50:19,107 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 3 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2023-02-17 07:50:19,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 180 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 504 Invalid, 7 Unknown, 0 Unchecked, 20.5s Time] [2023-02-17 07:50:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 07:50:19,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2023-02-17 07:50:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 72 states have internal predecessors, (77), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-17 07:50:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2023-02-17 07:50:19,129 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 51 [2023-02-17 07:50:19,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:50:19,129 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2023-02-17 07:50:19,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 07:50:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2023-02-17 07:50:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-17 07:50:19,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:50:19,130 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 07:50:19,135 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 07:50:19,335 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 07:50:19,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:50:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:50:19,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1448142086, now seen corresponding path program 2 times [2023-02-17 07:50:19,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:50:19,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411330603] [2023-02-17 07:50:19,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:50:19,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:50:19,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:50:19,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211921375] [2023-02-17 07:50:19,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:50:19,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:50:19,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:50:19,348 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 07:50:19,350 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 07:50:19,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:50:19,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:50:19,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 07:50:19,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:50:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 07:50:22,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:52:35,637 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~y~0#1| 2))) (or (and (< |c_ULTIMATE.start_main_~y~0#1| 0) (not (= 0 .cse0))) (not (= 1 .cse0)) (let ((.cse22 (* 2 |c_ULTIMATE.start_main_~x~0#1|))) (let ((.cse5 (* 2 .cse22)) (.cse13 (+ |c_ULTIMATE.start_main_~y~0#1| (- 1)))) (let ((.cse23 (= 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 2))) (.cse24 (< .cse13 0)) (.cse10 (* 2 .cse5)) (.cse7 (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse21 (div .cse13 2))) (and (or (let ((.cse9 (= 0 (mod .cse21 2))) (.cse8 (< .cse21 0)) (.cse4 (+ (* (- 1) .cse21 .cse22) .cse7)) (.cse6 (div .cse13 4))) (and (let ((.cse3 (mod .cse6 2)) (.cse12 (< .cse6 0))) (let ((.cse1 (not .cse12)) (.cse2 (= 0 .cse3))) (or (and (or .cse1 .cse2) (= 1 .cse3)) (not (= (+ .cse4 (* .cse5 .cse6)) .cse7)) (and .cse8 (not .cse9)) (let ((.cse11 (div .cse13 8))) (and (or (= (+ .cse4 (* .cse10 .cse11)) .cse7) (and .cse12 (not .cse2))) (or (= (+ .cse4 (* .cse10 (+ 1 .cse11))) .cse7) .cse1 .cse2)))))) (let ((.cse17 (+ 1 .cse6)) (.cse20 (+ .cse6 1))) (let ((.cse14 (mod .cse20 2)) (.cse18 (< .cse17 0))) (let ((.cse15 (not .cse18)) (.cse16 (= 0 .cse14))) (or .cse9 (and (= 1 .cse14) (or .cse15 .cse16)) (not .cse8) (not (= (+ .cse4 (* .cse5 .cse17)) .cse7)) (let ((.cse19 (div .cse20 2))) (and (or (and .cse18 (not .cse16)) (= (+ .cse4 (* .cse10 .cse19)) .cse7)) (or .cse15 .cse16 (= (+ .cse4 (* .cse10 (+ 1 .cse19))) .cse7)))))))))) (and (not .cse23) .cse24)) (or .cse23 (not .cse24) (let ((.cse40 (+ .cse21 1)) (.cse42 (+ 1 .cse21))) (let ((.cse34 (< .cse42 0)) (.cse32 (= 0 (mod .cse40 2))) (.cse25 (+ (* (- 1) .cse42 .cse22) .cse7)) (.cse35 (div .cse40 2))) (and (let ((.cse31 (+ .cse35 1)) (.cse26 (+ 1 .cse35))) (let ((.cse28 (< .cse26 0)) (.cse33 (mod .cse31 2))) (let ((.cse27 (= 0 .cse33)) (.cse30 (not .cse28))) (or (not (= (+ .cse25 (* .cse5 .cse26)) .cse7)) (let ((.cse29 (div .cse31 2))) (and (or (and (not .cse27) .cse28) (= (+ .cse25 (* .cse10 .cse29)) .cse7)) (or .cse27 .cse30 (= (+ .cse25 (* .cse10 (+ 1 .cse29))) .cse7)))) .cse32 (and (or .cse27 .cse30) (= 1 .cse33)) (not .cse34))))) (let ((.cse41 (mod .cse35 2)) (.cse39 (< .cse35 0))) (let ((.cse36 (not .cse39)) (.cse37 (= 0 .cse41))) (or (let ((.cse38 (div .cse40 4))) (and (or .cse36 .cse37 (= (+ .cse25 (* .cse10 (+ 1 .cse38))) .cse7)) (or (and .cse39 (not .cse37)) (= (+ .cse25 (* .cse10 .cse38)) .cse7)))) (and .cse34 (not .cse32)) (and (or .cse36 .cse37) (= 1 .cse41)) (not (= (+ .cse25 (* .cse5 .cse35)) .cse7))))))))))))))) is different from true [2023-02-17 07:52:37,674 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~y~0#1| 2))) (or (= 0 |c_ULTIMATE.start_main_~y~0#1|) (and (< |c_ULTIMATE.start_main_~y~0#1| 0) (not (= 0 .cse0))) (not (= 1 .cse0)) (let ((.cse22 (* 2 |c_ULTIMATE.start_main_~x~0#1|))) (let ((.cse5 (* 2 .cse22)) (.cse13 (+ |c_ULTIMATE.start_main_~y~0#1| (- 1)))) (let ((.cse23 (= 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 2))) (.cse24 (< .cse13 0)) (.cse10 (* 2 .cse5)) (.cse7 (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse21 (div .cse13 2))) (and (or (let ((.cse9 (= 0 (mod .cse21 2))) (.cse8 (< .cse21 0)) (.cse4 (+ (* (- 1) .cse21 .cse22) .cse7)) (.cse6 (div .cse13 4))) (and (let ((.cse3 (mod .cse6 2)) (.cse12 (< .cse6 0))) (let ((.cse1 (not .cse12)) (.cse2 (= 0 .cse3))) (or (and (or .cse1 .cse2) (= 1 .cse3)) (not (= (+ .cse4 (* .cse5 .cse6)) .cse7)) (and .cse8 (not .cse9)) (let ((.cse11 (div .cse13 8))) (and (or (= (+ .cse4 (* .cse10 .cse11)) .cse7) (and .cse12 (not .cse2))) (or (= (+ .cse4 (* .cse10 (+ 1 .cse11))) .cse7) .cse1 .cse2)))))) (let ((.cse17 (+ 1 .cse6)) (.cse20 (+ .cse6 1))) (let ((.cse14 (mod .cse20 2)) (.cse18 (< .cse17 0))) (let ((.cse15 (not .cse18)) (.cse16 (= 0 .cse14))) (or .cse9 (and (= 1 .cse14) (or .cse15 .cse16)) (not .cse8) (not (= (+ .cse4 (* .cse5 .cse17)) .cse7)) (let ((.cse19 (div .cse20 2))) (and (or (and .cse18 (not .cse16)) (= (+ .cse4 (* .cse10 .cse19)) .cse7)) (or .cse15 .cse16 (= (+ .cse4 (* .cse10 (+ 1 .cse19))) .cse7)))))))))) (and (not .cse23) .cse24)) (or .cse23 (not .cse24) (let ((.cse40 (+ .cse21 1)) (.cse42 (+ 1 .cse21))) (let ((.cse34 (< .cse42 0)) (.cse32 (= 0 (mod .cse40 2))) (.cse25 (+ (* (- 1) .cse42 .cse22) .cse7)) (.cse35 (div .cse40 2))) (and (let ((.cse31 (+ .cse35 1)) (.cse26 (+ 1 .cse35))) (let ((.cse28 (< .cse26 0)) (.cse33 (mod .cse31 2))) (let ((.cse27 (= 0 .cse33)) (.cse30 (not .cse28))) (or (not (= (+ .cse25 (* .cse5 .cse26)) .cse7)) (let ((.cse29 (div .cse31 2))) (and (or (and (not .cse27) .cse28) (= (+ .cse25 (* .cse10 .cse29)) .cse7)) (or .cse27 .cse30 (= (+ .cse25 (* .cse10 (+ 1 .cse29))) .cse7)))) .cse32 (and (or .cse27 .cse30) (= 1 .cse33)) (not .cse34))))) (let ((.cse41 (mod .cse35 2)) (.cse39 (< .cse35 0))) (let ((.cse36 (not .cse39)) (.cse37 (= 0 .cse41))) (or (let ((.cse38 (div .cse40 4))) (and (or .cse36 .cse37 (= (+ .cse25 (* .cse10 (+ 1 .cse38))) .cse7)) (or (and .cse39 (not .cse37)) (= (+ .cse25 (* .cse10 .cse38)) .cse7)))) (and .cse34 (not .cse32)) (and (or .cse36 .cse37) (= 1 .cse41)) (not (= (+ .cse25 (* .cse5 .cse35)) .cse7))))))))))))))) is different from true [2023-02-17 07:52:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 35 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 10 not checked. [2023-02-17 07:52:38,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:52:38,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411330603] [2023-02-17 07:52:38,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:52:38,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211921375] [2023-02-17 07:52:38,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211921375] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:52:38,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:52:38,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 33 [2023-02-17 07:52:38,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025077707] [2023-02-17 07:52:38,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:52:38,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 07:52:38,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:52:38,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 07:52:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=777, Unknown=2, NotChecked=118, Total=1056 [2023-02-17 07:52:38,779 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 30 states have internal predecessors, (58), 11 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-02-17 07:52:42,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:52:45,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:52:47,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []