./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard-u.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/hard-u.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 98c9c42af626702ddf5387966d0ee6d8ed18622c4592b3b15adb184fa40ea1b1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 16:25:14,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 16:25:14,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 16:25:14,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 16:25:14,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 16:25:14,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 16:25:14,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 16:25:14,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 16:25:14,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 16:25:14,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 16:25:14,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 16:25:14,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 16:25:14,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 16:25:14,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 16:25:14,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 16:25:14,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 16:25:14,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 16:25:14,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 16:25:14,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 16:25:14,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 16:25:14,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 16:25:14,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 16:25:14,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 16:25:14,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 16:25:14,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 16:25:14,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 16:25:14,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 16:25:14,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 16:25:14,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 16:25:14,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 16:25:14,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 16:25:14,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 16:25:14,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 16:25:14,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 16:25:14,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 16:25:14,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 16:25:14,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 16:25:14,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 16:25:14,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 16:25:14,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 16:25:14,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 16:25:14,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 16:25:14,114 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 16:25:14,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 16:25:14,115 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 16:25:14,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 16:25:14,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 16:25:14,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 16:25:14,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 16:25:14,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 16:25:14,118 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 16:25:14,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 16:25:14,119 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 16:25:14,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 16:25:14,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 16:25:14,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 16:25:14,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 16:25:14,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 16:25:14,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 16:25:14,121 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 16:25:14,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 16:25:14,121 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 16:25:14,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 16:25:14,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 16:25:14,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 16:25:14,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 16:25:14,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 16:25:14,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 16:25:14,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 16:25:14,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 16:25:14,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 16:25:14,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 16:25:14,123 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 16:25:14,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 16:25:14,124 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 16:25:14,124 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 16:25:14,124 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 16:25:14,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c9c42af626702ddf5387966d0ee6d8ed18622c4592b3b15adb184fa40ea1b1 [2023-02-18 16:25:14,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 16:25:14,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 16:25:14,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 16:25:14,349 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 16:25:14,350 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 16:25:14,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard-u.c [2023-02-18 16:25:15,525 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 16:25:15,693 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 16:25:15,694 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-u.c [2023-02-18 16:25:15,699 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61daabbbd/5672ad944af54a1ab2b6f0821a375154/FLAG2a6574a19 [2023-02-18 16:25:15,714 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61daabbbd/5672ad944af54a1ab2b6f0821a375154 [2023-02-18 16:25:15,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 16:25:15,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 16:25:15,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 16:25:15,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 16:25:15,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 16:25:15,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe0091f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15, skipping insertion in model container [2023-02-18 16:25:15,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 16:25:15,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 16:25:15,850 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/hard-u.c[537,550] [2023-02-18 16:25:15,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 16:25:15,869 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 16:25:15,878 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/hard-u.c[537,550] [2023-02-18 16:25:15,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 16:25:15,892 INFO L208 MainTranslator]: Completed translation [2023-02-18 16:25:15,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15 WrapperNode [2023-02-18 16:25:15,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 16:25:15,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 16:25:15,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 16:25:15,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 16:25:15,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,915 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2023-02-18 16:25:15,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 16:25:15,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 16:25:15,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 16:25:15,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 16:25:15,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,930 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 16:25:15,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 16:25:15,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 16:25:15,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 16:25:15,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15" (1/1) ... [2023-02-18 16:25:15,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 16:25:15,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:25:15,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 16:25:15,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 16:25:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 16:25:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 16:25:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 16:25:16,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 16:25:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 16:25:16,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 16:25:16,062 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 16:25:16,064 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 16:25:16,245 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 16:25:16,250 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 16:25:16,250 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 16:25:16,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:25:16 BoogieIcfgContainer [2023-02-18 16:25:16,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 16:25:16,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 16:25:16,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 16:25:16,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 16:25:16,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 04:25:15" (1/3) ... [2023-02-18 16:25:16,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f55c633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:25:16, skipping insertion in model container [2023-02-18 16:25:16,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:25:15" (2/3) ... [2023-02-18 16:25:16,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f55c633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:25:16, skipping insertion in model container [2023-02-18 16:25:16,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:25:16" (3/3) ... [2023-02-18 16:25:16,265 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u.c [2023-02-18 16:25:16,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 16:25:16,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 16:25:16,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 16:25:16,337 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f411966, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 16:25:16,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 16:25:16,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 16:25:16,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 16:25:16,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:25:16,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:25:16,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:25:16,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:25:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2023-02-18 16:25:16,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:25:16,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93060196] [2023-02-18 16:25:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:16,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:25:16,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:25:16,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93060196] [2023-02-18 16:25:16,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93060196] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:25:16,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:25:16,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 16:25:16,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384250016] [2023-02-18 16:25:16,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:25:16,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 16:25:16,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:25:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 16:25:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 16:25:16,513 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:25:16,530 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2023-02-18 16:25:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 16:25:16,532 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 16:25:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:25:16,538 INFO L225 Difference]: With dead ends: 49 [2023-02-18 16:25:16,538 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 16:25:16,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 16:25:16,543 INFO L413 NwaCegarLoop]: 34 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, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:25:16,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:25:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 16:25:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-18 16:25:16,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 16:25:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2023-02-18 16:25:16,574 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2023-02-18 16:25:16,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:25:16,574 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2023-02-18 16:25:16,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2023-02-18 16:25:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 16:25:16,576 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:25:16,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:25:16,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 16:25:16,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:25:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:25:16,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2023-02-18 16:25:16,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:25:16,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871235502] [2023-02-18 16:25:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:16,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:25:16,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:25:16,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871235502] [2023-02-18 16:25:16,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871235502] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:25:16,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:25:16,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 16:25:16,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124321367] [2023-02-18 16:25:16,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:25:16,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 16:25:16,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:25:16,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 16:25:16,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 16:25:16,725 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:25:16,770 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-02-18 16:25:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 16:25:16,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 16:25:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:25:16,771 INFO L225 Difference]: With dead ends: 35 [2023-02-18 16:25:16,771 INFO L226 Difference]: Without dead ends: 33 [2023-02-18 16:25:16,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 16:25:16,773 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:25:16,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:25:16,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-18 16:25:16,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2023-02-18 16:25:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 16:25:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-02-18 16:25:16,782 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2023-02-18 16:25:16,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:25:16,782 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-02-18 16:25:16,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:25:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-02-18 16:25:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 16:25:16,783 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:25:16,783 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:25:16,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 16:25:16,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:25:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:25:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2023-02-18 16:25:16,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:25:16,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087962644] [2023-02-18 16:25:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:16,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:17,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 16:25:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:25:17,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:25:17,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087962644] [2023-02-18 16:25:17,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087962644] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:25:17,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:25:17,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 16:25:17,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107524552] [2023-02-18 16:25:17,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:25:17,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 16:25:17,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:25:17,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 16:25:17,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 16:25:17,059 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 16:25:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:25:17,118 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-02-18 16:25:17,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 16:25:17,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-18 16:25:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:25:17,119 INFO L225 Difference]: With dead ends: 39 [2023-02-18 16:25:17,119 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 16:25:17,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 16:25:17,121 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:25:17,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 88 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:25:17,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 16:25:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-02-18 16:25:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 16:25:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-02-18 16:25:17,132 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2023-02-18 16:25:17,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:25:17,133 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-02-18 16:25:17,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 16:25:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-02-18 16:25:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 16:25:17,134 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:25:17,134 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:25:17,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 16:25:17,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:25:17,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:25:17,135 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2023-02-18 16:25:17,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:25:17,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8489329] [2023-02-18 16:25:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:17,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:17,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:25:17,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870952037] [2023-02-18 16:25:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:17,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:25:17,169 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:25:17,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 16:25:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:17,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 16:25:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:25:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 16:25:17,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:25:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 16:25:18,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:25:18,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8489329] [2023-02-18 16:25:18,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:25:18,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870952037] [2023-02-18 16:25:18,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870952037] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:25:18,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:25:18,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-02-18 16:25:18,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192787426] [2023-02-18 16:25:18,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:25:18,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 16:25:18,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:25:18,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 16:25:18,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-02-18 16:25:18,341 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 16:25:20,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:25:23,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:25:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:25:23,589 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2023-02-18 16:25:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 16:25:23,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2023-02-18 16:25:23,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:25:23,592 INFO L225 Difference]: With dead ends: 69 [2023-02-18 16:25:23,592 INFO L226 Difference]: Without dead ends: 55 [2023-02-18 16:25:23,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-02-18 16:25:23,594 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 60 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:25:23,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 77 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2023-02-18 16:25:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-18 16:25:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-02-18 16:25:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 35 states have internal predecessors, (36), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 16:25:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2023-02-18 16:25:23,608 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 19 [2023-02-18 16:25:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:25:23,609 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2023-02-18 16:25:23,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 16:25:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2023-02-18 16:25:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 16:25:23,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:25:23,610 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:25:23,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 16:25:23,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:23,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:25:23,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:25:23,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2023-02-18 16:25:23,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:25:23,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430353692] [2023-02-18 16:25:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:23,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:23,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:25:23,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368400421] [2023-02-18 16:25:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:23,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:23,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:25:23,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:25:23,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 16:25:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:23,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 16:25:23,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:25:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:25:23,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:25:23,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:25:23,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430353692] [2023-02-18 16:25:23,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:25:23,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368400421] [2023-02-18 16:25:23,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368400421] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:25:23,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:25:23,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 16:25:23,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265145830] [2023-02-18 16:25:23,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:25:23,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 16:25:23,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:25:23,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 16:25:23,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 16:25:23,946 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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), 1 states have call successors, (3) [2023-02-18 16:25:24,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:25:24,242 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-02-18 16:25:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 16:25:24,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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), 1 states have call successors, (3) Word has length 26 [2023-02-18 16:25:24,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:25:24,244 INFO L225 Difference]: With dead ends: 65 [2023-02-18 16:25:24,244 INFO L226 Difference]: Without dead ends: 54 [2023-02-18 16:25:24,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-02-18 16:25:24,245 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:25:24,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 79 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:25:24,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-18 16:25:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-02-18 16:25:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 16:25:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2023-02-18 16:25:24,257 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 26 [2023-02-18 16:25:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:25:24,257 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-02-18 16:25:24,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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), 1 states have call successors, (3) [2023-02-18 16:25:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2023-02-18 16:25:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 16:25:24,258 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:25:24,259 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:25:24,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 16:25:24,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:24,465 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:25:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:25:24,465 INFO L85 PathProgramCache]: Analyzing trace with hash -984335949, now seen corresponding path program 1 times [2023-02-18 16:25:24,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:25:24,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255118852] [2023-02-18 16:25:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:24,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:24,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:25:24,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988037156] [2023-02-18 16:25:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:24,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:24,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:25:24,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:25:24,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 16:25:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:24,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-18 16:25:24,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:25:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 16:25:25,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:25:30,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:25:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255118852] [2023-02-18 16:25:30,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:25:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988037156] [2023-02-18 16:25:30,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988037156] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:25:30,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:25:30,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-18 16:25:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774039809] [2023-02-18 16:25:30,213 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:25:30,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 16:25:30,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:25:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 16:25:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=187, Unknown=2, NotChecked=0, Total=240 [2023-02-18 16:25:30,214 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 16:25:32,997 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 [0] [2023-02-18 16:25:36,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 16:25:40,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 16:25:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:25:40,803 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2023-02-18 16:25:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 16:25:40,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2023-02-18 16:25:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:25:40,806 INFO L225 Difference]: With dead ends: 67 [2023-02-18 16:25:40,806 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 16:25:40,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=122, Invalid=428, Unknown=2, NotChecked=0, Total=552 [2023-02-18 16:25:40,807 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 48 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:25:40,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 60 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 195 Invalid, 5 Unknown, 0 Unchecked, 9.1s Time] [2023-02-18 16:25:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 16:25:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-02-18 16:25:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 42 states have internal predecessors, (44), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 16:25:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-02-18 16:25:40,820 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 43 [2023-02-18 16:25:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:25:40,821 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-02-18 16:25:40,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 16:25:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-02-18 16:25:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 16:25:40,822 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:25:40,823 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 16:25:40,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 16:25:41,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:41,029 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:25:41,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:25:41,030 INFO L85 PathProgramCache]: Analyzing trace with hash -312176892, now seen corresponding path program 1 times [2023-02-18 16:25:41,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:25:41,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485947085] [2023-02-18 16:25:41,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:41,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:41,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:25:41,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169849181] [2023-02-18 16:25:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:41,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:41,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:25:41,045 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:25:41,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 16:25:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:25:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 16:25:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:25:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-18 16:25:41,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:25:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-18 16:25:48,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:25:48,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485947085] [2023-02-18 16:25:48,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:25:48,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169849181] [2023-02-18 16:25:48,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169849181] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:25:48,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:25:48,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2023-02-18 16:25:48,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650745752] [2023-02-18 16:25:48,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:25:48,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 16:25:48,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:25:48,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 16:25:48,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=238, Unknown=3, NotChecked=0, Total=306 [2023-02-18 16:25:48,229 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 15 states have internal predecessors, (30), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-02-18 16:25:50,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:25:52,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:26:03,189 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2023-02-18 16:26:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 16:26:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 15 states have internal predecessors, (30), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 53 [2023-02-18 16:26:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:26:03,190 INFO L225 Difference]: With dead ends: 101 [2023-02-18 16:26:03,190 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 16:26:03,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=139, Invalid=508, Unknown=3, NotChecked=0, Total=650 [2023-02-18 16:26:03,192 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 97 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:26:03,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 128 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 432 Invalid, 2 Unknown, 0 Unchecked, 14.8s Time] [2023-02-18 16:26:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 16:26:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2023-02-18 16:26:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.173913043478261) internal successors, (54), 49 states have internal predecessors, (54), 23 states have call successors, (23), 8 states have call predecessors, (23), 8 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 16:26:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2023-02-18 16:26:03,209 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 53 [2023-02-18 16:26:03,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:26:03,209 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2023-02-18 16:26:03,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 15 states have internal predecessors, (30), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-02-18 16:26:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2023-02-18 16:26:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 16:26:03,211 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:26:03,211 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:26:03,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 16:26:03,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:26:03,417 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:26:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:26:03,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2023-02-18 16:26:03,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:26:03,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687071524] [2023-02-18 16:26:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:26:03,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:26:03,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:26:03,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383790889] [2023-02-18 16:26:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:26:03,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:26:03,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:26:03,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:26:03,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 16:26:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:26:03,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-18 16:26:03,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:26:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 35 proven. 24 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-18 16:26:09,198 INFO L328 TraceCheckSpWp]: Computing backward predicates...