./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound100.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/ps2-ll_unwindbound100.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 9dd084b74d402040bb1dcf601a4c548e70d932326201e2bbf6bd431598d05766 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 19:12:03,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 19:12:03,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 19:12:04,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 19:12:04,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 19:12:04,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 19:12:04,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 19:12:04,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 19:12:04,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 19:12:04,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 19:12:04,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 19:12:04,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 19:12:04,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 19:12:04,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 19:12:04,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 19:12:04,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 19:12:04,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 19:12:04,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 19:12:04,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 19:12:04,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 19:12:04,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 19:12:04,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 19:12:04,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 19:12:04,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 19:12:04,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 19:12:04,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 19:12:04,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 19:12:04,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 19:12:04,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 19:12:04,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 19:12:04,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 19:12:04,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 19:12:04,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 19:12:04,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 19:12:04,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 19:12:04,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 19:12:04,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 19:12:04,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 19:12:04,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 19:12:04,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 19:12:04,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 19:12:04,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 19:12:04,083 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 19:12:04,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 19:12:04,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 19:12:04,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 19:12:04,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 19:12:04,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 19:12:04,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 19:12:04,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 19:12:04,086 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 19:12:04,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 19:12:04,087 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 19:12:04,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 19:12:04,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 19:12:04,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 19:12:04,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 19:12:04,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 19:12:04,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 19:12:04,088 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 19:12:04,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 19:12:04,089 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 19:12:04,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 19:12:04,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 19:12:04,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 19:12:04,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 19:12:04,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 19:12:04,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 19:12:04,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 19:12:04,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 19:12:04,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 19:12:04,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 19:12:04,090 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 19:12:04,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 19:12:04,091 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 19:12:04,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 19:12:04,091 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 19:12:04,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dd084b74d402040bb1dcf601a4c548e70d932326201e2bbf6bd431598d05766 [2023-02-18 19:12:04,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 19:12:04,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 19:12:04,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 19:12:04,384 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 19:12:04,393 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 19:12:04,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound100.c [2023-02-18 19:12:05,538 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 19:12:05,712 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 19:12:05,712 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound100.c [2023-02-18 19:12:05,717 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d032b5edb/eb10611f5f954834acc989a8f96e54fe/FLAGa01408333 [2023-02-18 19:12:05,731 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d032b5edb/eb10611f5f954834acc989a8f96e54fe [2023-02-18 19:12:05,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 19:12:05,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 19:12:05,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 19:12:05,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 19:12:05,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 19:12:05,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77efe13c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05, skipping insertion in model container [2023-02-18 19:12:05,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 19:12:05,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 19:12:05,895 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/ps2-ll_unwindbound100.c[454,467] [2023-02-18 19:12:05,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 19:12:05,913 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 19:12:05,922 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/ps2-ll_unwindbound100.c[454,467] [2023-02-18 19:12:05,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 19:12:05,935 INFO L208 MainTranslator]: Completed translation [2023-02-18 19:12:05,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05 WrapperNode [2023-02-18 19:12:05,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 19:12:05,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 19:12:05,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 19:12:05,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 19:12:05,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,955 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2023-02-18 19:12:05,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 19:12:05,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 19:12:05,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 19:12:05,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 19:12:05,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,970 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 19:12:05,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 19:12:05,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 19:12:05,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 19:12:05,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05" (1/1) ... [2023-02-18 19:12:05,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 19:12:05,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:12:06,002 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 19:12:06,004 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 19:12:06,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 19:12:06,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 19:12:06,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 19:12:06,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 19:12:06,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 19:12:06,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 19:12:06,089 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 19:12:06,091 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 19:12:06,243 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 19:12:06,248 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 19:12:06,248 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 19:12:06,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:12:06 BoogieIcfgContainer [2023-02-18 19:12:06,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 19:12:06,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 19:12:06,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 19:12:06,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 19:12:06,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 07:12:05" (1/3) ... [2023-02-18 19:12:06,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e952e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 07:12:06, skipping insertion in model container [2023-02-18 19:12:06,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:12:05" (2/3) ... [2023-02-18 19:12:06,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e952e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 07:12:06, skipping insertion in model container [2023-02-18 19:12:06,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:12:06" (3/3) ... [2023-02-18 19:12:06,273 INFO L112 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound100.c [2023-02-18 19:12:06,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 19:12:06,301 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 19:12:06,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 19:12:06,420 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;@3fe0e44d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 19:12:06,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 19:12:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:12:06,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 19:12:06,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:12:06,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:12:06,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:12:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:12:06,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1819757606, now seen corresponding path program 1 times [2023-02-18 19:12:06,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:12:06,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357366006] [2023-02-18 19:12:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:12:06,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:12:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:12:06,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:12:06,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357366006] [2023-02-18 19:12:06,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 19:12:06,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065132399] [2023-02-18 19:12:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:12:06,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:12:06,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:12:06,545 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 19:12:06,546 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 19:12:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:12:06,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 19:12:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:12:06,604 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 19:12:06,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 19:12:06,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065132399] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 19:12:06,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 19:12:06,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 19:12:06,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278351275] [2023-02-18 19:12:06,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 19:12:06,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 19:12:06,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:12:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 19:12:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 19:12:06,634 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 19:12:06,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:12:06,649 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2023-02-18 19:12:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 19:12:06,651 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2023-02-18 19:12:06,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:12:06,656 INFO L225 Difference]: With dead ends: 32 [2023-02-18 19:12:06,657 INFO L226 Difference]: Without dead ends: 13 [2023-02-18 19:12:06,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 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 19:12:06,662 INFO L413 NwaCegarLoop]: 19 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, 19 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 19:12:06,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 19:12:06,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-18 19:12:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-18 19:12:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 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 19:12:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-18 19:12:06,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-02-18 19:12:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:12:06,691 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-18 19:12:06,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 19:12:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-18 19:12:06,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 19:12:06,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:12:06,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:12:06,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 19:12:06,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-18 19:12:06,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:12:06,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:12:06,899 INFO L85 PathProgramCache]: Analyzing trace with hash 178410715, now seen corresponding path program 1 times [2023-02-18 19:12:06,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:12:06,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211799118] [2023-02-18 19:12:06,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:12:06,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:12:06,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:12:06,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254155458] [2023-02-18 19:12:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:12:06,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:12:06,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:12:06,921 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 19:12:06,923 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 19:12:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:12:06,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 19:12:06,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:12:06,988 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 19:12:06,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 19:12:06,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:12:06,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211799118] [2023-02-18 19:12:06,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:12:06,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254155458] [2023-02-18 19:12:06,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254155458] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 19:12:06,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 19:12:06,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 19:12:06,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623243818] [2023-02-18 19:12:06,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 19:12:06,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 19:12:06,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:12:06,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 19:12:06,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 19:12:06,992 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 19:12:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:12:07,004 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-02-18 19:12:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 19:12:07,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 19:12:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:12:07,005 INFO L225 Difference]: With dead ends: 22 [2023-02-18 19:12:07,005 INFO L226 Difference]: Without dead ends: 15 [2023-02-18 19:12:07,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 19:12:07,007 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 19:12:07,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 19:12:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-18 19:12:07,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-18 19:12:07,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 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 19:12:07,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-18 19:12:07,011 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2023-02-18 19:12:07,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:12:07,012 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-18 19:12:07,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 19:12:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-18 19:12:07,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 19:12:07,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:12:07,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:12:07,025 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 19:12:07,219 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 [2023-02-18 19:12:07,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:12:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:12:07,220 INFO L85 PathProgramCache]: Analyzing trace with hash 180198175, now seen corresponding path program 1 times [2023-02-18 19:12:07,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:12:07,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763936192] [2023-02-18 19:12:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:12:07,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:12:07,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:12:07,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680559893] [2023-02-18 19:12:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:12:07,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:12:07,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:12:07,231 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 19:12:07,234 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 19:12:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:12:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 19:12:07,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:12:07,303 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 19:12:07,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 19:12:07,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:12:07,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763936192] [2023-02-18 19:12:07,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:12:07,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680559893] [2023-02-18 19:12:07,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680559893] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 19:12:07,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 19:12:07,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 19:12:07,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655711921] [2023-02-18 19:12:07,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 19:12:07,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 19:12:07,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:12:07,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 19:12:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 19:12:07,309 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 19:12:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:12:07,357 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-02-18 19:12:07,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 19:12:07,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 19:12:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:12:07,359 INFO L225 Difference]: With dead ends: 24 [2023-02-18 19:12:07,359 INFO L226 Difference]: Without dead ends: 21 [2023-02-18 19:12:07,359 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 19:12:07,361 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 19:12:07,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 41 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 19:12:07,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-18 19:12:07,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-18 19:12:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:12:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-02-18 19:12:07,371 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 8 [2023-02-18 19:12:07,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:12:07,371 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-02-18 19:12:07,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 19:12:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-02-18 19:12:07,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 19:12:07,372 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:12:07,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:12:07,380 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 19:12:07,578 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 [2023-02-18 19:12:07,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:12:07,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:12:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1542398814, now seen corresponding path program 1 times [2023-02-18 19:12:07,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:12:07,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194725672] [2023-02-18 19:12:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:12:07,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:12:07,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:12:07,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267369736] [2023-02-18 19:12:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:12:07,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:12:07,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:12:07,593 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 19:12:07,616 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 19:12:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:12:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 19:12:07,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:12:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:12:07,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:12:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:12:07,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:12:07,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194725672] [2023-02-18 19:12:07,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:12:07,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267369736] [2023-02-18 19:12:07,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267369736] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 19:12:07,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 19:12:07,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 19:12:07,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887509946] [2023-02-18 19:12:07,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 19:12:07,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 19:12:07,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:12:07,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 19:12:07,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 19:12:07,714 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:12:07,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:12:07,783 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-02-18 19:12:07,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 19:12:07,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-18 19:12:07,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:12:07,789 INFO L225 Difference]: With dead ends: 52 [2023-02-18 19:12:07,790 INFO L226 Difference]: Without dead ends: 45 [2023-02-18 19:12:07,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-18 19:12:07,795 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 19:12:07,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 66 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 19:12:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-18 19:12:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2023-02-18 19:12:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 19:12:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-02-18 19:12:07,804 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 16 [2023-02-18 19:12:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:12:07,805 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-02-18 19:12:07,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:12:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-02-18 19:12:07,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 19:12:07,806 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:12:07,806 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:12:07,814 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 19:12:08,011 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 [2023-02-18 19:12:08,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:12:08,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:12:08,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1540611354, now seen corresponding path program 1 times [2023-02-18 19:12:08,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:12:08,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370100280] [2023-02-18 19:12:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:12:08,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:12:08,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:12:08,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113143252] [2023-02-18 19:12:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:12:08,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:12:08,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:12:08,023 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 19:12:08,025 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 19:12:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:12:08,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 19:12:08,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:12:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:12:08,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:12:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:12:08,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:12:08,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370100280] [2023-02-18 19:12:08,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:12:08,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113143252] [2023-02-18 19:12:08,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113143252] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 19:12:08,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 19:12:08,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-18 19:12:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639782510] [2023-02-18 19:12:08,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 19:12:08,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 19:12:08,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:12:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 19:12:08,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 19:12:08,291 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:12:08,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:12:08,347 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-02-18 19:12:08,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 19:12:08,348 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-18 19:12:08,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:12:08,350 INFO L225 Difference]: With dead ends: 41 [2023-02-18 19:12:08,350 INFO L226 Difference]: Without dead ends: 0 [2023-02-18 19:12:08,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-18 19:12:08,353 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 19:12:08,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 64 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 19:12:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-18 19:12:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-18 19:12:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 19:12:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-18 19:12:08,359 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2023-02-18 19:12:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:12:08,359 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-18 19:12:08,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:12:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-18 19:12:08,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-18 19:12:08,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-18 19:12:08,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 19:12:08,568 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 [2023-02-18 19:12:08,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-18 19:12:08,576 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-18 19:12:08,577 INFO L899 garLoopResultBuilder]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2023-02-18 19:12:08,577 INFO L895 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse0 (= 0 (+ (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (- (* 2 |ULTIMATE.start_main_~x~0#1|))) |ULTIMATE.start_main_~y~0#1|)))) (or (and (< ~counter~0 100) .cse0) (and (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) (<= ~counter~0 0)) (and .cse0 (< (+ ~counter~0 1) 100)) (and (= |ULTIMATE.start_main_~y~0#1| (+ 1 0)) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~y~0#1| 0)) (<= (+ ~counter~0 (- 1)) 0)) .cse0)) [2023-02-18 19:12:08,578 INFO L895 garLoopResultBuilder]: At program point L27-4(lines 27 36) the Hoare annotation is: (let ((.cse0 (= 0 (+ (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (- (* 2 |ULTIMATE.start_main_~x~0#1|))) |ULTIMATE.start_main_~y~0#1|)))) (or (and (< ~counter~0 100) .cse0) (and (= |ULTIMATE.start_main_~y~0#1| (+ 1 0)) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~y~0#1| 0)) (< (+ ~counter~0 1) 100)) (and (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0)) .cse0)) [2023-02-18 19:12:08,578 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-18 19:12:08,578 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 18 40) the Hoare annotation is: true [2023-02-18 19:12:08,578 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-18 19:12:08,578 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-18 19:12:08,578 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (= 0 (+ (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (- (* 2 |ULTIMATE.start_main_~x~0#1|))) |ULTIMATE.start_main_~y~0#1|)))) (or (and (< ~counter~0 100) .cse0) (and (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) (<= (+ ~counter~0 (- 1)) 0)) (and (= |ULTIMATE.start_main_~y~0#1| (+ 1 0)) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~y~0#1| 0)) (< (+ ~counter~0 1) 100)) .cse0)) [2023-02-18 19:12:08,579 INFO L899 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2023-02-18 19:12:08,579 INFO L899 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2023-02-18 19:12:08,579 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2023-02-18 19:12:08,579 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2023-02-18 19:12:08,579 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2023-02-18 19:12:08,579 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 15) the Hoare annotation is: (let ((.cse1 (= |__VERIFIER_assert_#in~cond| 1))) (let ((.cse0 (not .cse1))) (and (let ((.cse2 (< (+ ~counter~0 1) 100))) (or .cse0 (and .cse1 .cse2) (not .cse2))) (let ((.cse3 (< ~counter~0 100))) (or .cse0 (not .cse3) (and .cse1 .cse3))) (let ((.cse4 (<= (+ ~counter~0 (- 1)) 0))) (or .cse0 (not .cse4) (and .cse1 .cse4)))))) [2023-02-18 19:12:08,580 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2023-02-18 19:12:08,580 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2023-02-18 19:12:08,583 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-02-18 19:12:08,584 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 19:12:08,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 07:12:08 BoogieIcfgContainer [2023-02-18 19:12:08,601 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 19:12:08,605 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 19:12:08,605 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 19:12:08,605 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 19:12:08,606 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:12:06" (3/4) ... [2023-02-18 19:12:08,609 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-18 19:12:08,615 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-02-18 19:12:08,618 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-18 19:12:08,618 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-02-18 19:12:08,619 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-18 19:12:08,619 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-18 19:12:08,642 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 19:12:08,643 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 19:12:08,643 INFO L158 Benchmark]: Toolchain (without parser) took 2908.62ms. Allocated memory is still 125.8MB. Free memory was 87.8MB in the beginning and 85.8MB in the end (delta: 2.0MB). Peak memory consumption was 1.2MB. Max. memory is 16.1GB. [2023-02-18 19:12:08,643 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 104.9MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 19:12:08,644 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.90ms. Allocated memory is still 125.8MB. Free memory was 87.8MB in the beginning and 77.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 19:12:08,644 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.27ms. Allocated memory is still 125.8MB. Free memory was 77.4MB in the beginning and 76.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 19:12:08,644 INFO L158 Benchmark]: Boogie Preprocessor took 15.87ms. Allocated memory is still 125.8MB. Free memory was 76.1MB in the beginning and 74.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 19:12:08,645 INFO L158 Benchmark]: RCFGBuilder took 277.24ms. Allocated memory is still 125.8MB. Free memory was 74.9MB in the beginning and 65.6MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 19:12:08,645 INFO L158 Benchmark]: TraceAbstraction took 2350.41ms. Allocated memory is still 125.8MB. Free memory was 64.8MB in the beginning and 88.2MB in the end (delta: -23.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 19:12:08,646 INFO L158 Benchmark]: Witness Printer took 37.80ms. Allocated memory is still 125.8MB. Free memory was 88.2MB in the beginning and 85.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 19:12:08,648 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 104.9MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 199.90ms. Allocated memory is still 125.8MB. Free memory was 87.8MB in the beginning and 77.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.27ms. Allocated memory is still 125.8MB. Free memory was 77.4MB in the beginning and 76.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.87ms. Allocated memory is still 125.8MB. Free memory was 76.1MB in the beginning and 74.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 277.24ms. Allocated memory is still 125.8MB. Free memory was 74.9MB in the beginning and 65.6MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2350.41ms. Allocated memory is still 125.8MB. Free memory was 64.8MB in the beginning and 88.2MB in the end (delta: -23.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 37.80ms. Allocated memory is still 125.8MB. Free memory was 88.2MB in the beginning and 85.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.2s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 46 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44 mSDsluCounter, 225 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 153 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 112 IncrementalHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 72 mSDtfsCounter, 112 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 16 PreInvPairs, 30 NumberOfFragments, 240 HoareAnnotationTreeSize, 16 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 62 NumberOfCodeBlocks, 62 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 293 SizeOfPredicates, 6 NumberOfNonLiveVariables, 283 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 9/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((counter < 100 && 0 == y * y + -(2 * x) + y) || ((x == 0 && y == 0) && counter <= 0)) || (0 == y * y + -(2 * x) + y && counter + 1 < 100)) || ((y == 1 + 0 && x == y + 0) && counter + -1 <= 0)) || 0 == y * y + -(2 * x) + y RESULT: Ultimate proved your program to be correct! [2023-02-18 19:12:08,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE