./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/geo2-ll_unwindbound2.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 2e05249da124fa8fd89a00721e51c7b41eff3d4952cff855bee564f7b5deef09 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:57:30,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:57:30,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:57:30,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:57:30,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:57:30,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:57:30,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:57:30,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:57:30,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:57:30,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:57:30,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:57:30,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:57:30,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:57:30,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:57:30,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:57:30,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:57:30,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:57:30,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:57:30,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:57:30,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:57:30,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:57:30,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:57:30,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:57:30,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:57:30,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:57:30,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:57:30,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:57:30,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:57:30,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:57:30,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:57:30,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:57:30,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:57:30,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:57:30,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:57:30,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:57:30,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:57:30,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:57:30,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:57:30,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:57:30,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:57:30,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:57:30,946 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:57:30,976 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:57:30,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:57:30,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:57:30,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:57:30,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:57:30,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:57:30,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:57:30,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:57:30,979 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:57:30,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:57:30,980 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:57:30,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:57:30,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:57:30,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:57:30,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:57:30,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:57:30,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:57:30,982 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:57:30,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:57:30,982 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:57:30,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:57:30,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:57:30,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:57:30,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:57:30,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:57:30,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:57:30,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:57:30,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:57:30,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:57:30,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:57:30,985 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:57:30,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:57:30,985 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:57:30,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:57:30,986 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:57:30,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e05249da124fa8fd89a00721e51c7b41eff3d4952cff855bee564f7b5deef09 [2023-02-15 11:57:31,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:57:31,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:57:31,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:57:31,273 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:57:31,274 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:57:31,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound2.c [2023-02-15 11:57:32,361 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:57:32,500 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:57:32,501 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound2.c [2023-02-15 11:57:32,506 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efa7b2aab/052f25bf0b5d454ebe79218ba70d48db/FLAG090eb7ecc [2023-02-15 11:57:32,519 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efa7b2aab/052f25bf0b5d454ebe79218ba70d48db [2023-02-15 11:57:32,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:57:32,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:57:32,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:57:32,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:57:32,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:57:32,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea37b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32, skipping insertion in model container [2023-02-15 11:57:32,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:57:32,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:57:32,669 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/geo2-ll_unwindbound2.c[525,538] [2023-02-15 11:57:32,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:57:32,689 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:57:32,699 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/geo2-ll_unwindbound2.c[525,538] [2023-02-15 11:57:32,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:57:32,714 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:57:32,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32 WrapperNode [2023-02-15 11:57:32,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:57:32,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:57:32,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:57:32,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:57:32,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,743 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-15 11:57:32,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:57:32,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:57:32,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:57:32,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:57:32,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,757 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:57:32,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:57:32,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:57:32,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:57:32,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32" (1/1) ... [2023-02-15 11:57:32,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:57:32,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:57:32,788 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) [2023-02-15 11:57:32,798 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 [2023-02-15 11:57:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:57:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:57:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:57:32,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:57:32,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:57:32,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:57:32,899 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:57:32,901 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:57:33,070 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:57:33,074 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:57:33,084 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 11:57:33,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:57:33 BoogieIcfgContainer [2023-02-15 11:57:33,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:57:33,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:57:33,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:57:33,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:57:33,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:57:32" (1/3) ... [2023-02-15 11:57:33,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27962967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:57:33, skipping insertion in model container [2023-02-15 11:57:33,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:57:32" (2/3) ... [2023-02-15 11:57:33,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27962967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:57:33, skipping insertion in model container [2023-02-15 11:57:33,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:57:33" (3/3) ... [2023-02-15 11:57:33,094 INFO L112 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound2.c [2023-02-15 11:57:33,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:57:33,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:57:33,172 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:57:33,178 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;@7e7198b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:57:33,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:57:33,182 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) [2023-02-15 11:57:33,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:57:33,187 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:57:33,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:57:33,187 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:57:33,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:57:33,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1819757606, now seen corresponding path program 1 times [2023-02-15 11:57:33,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:57:33,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680103699] [2023-02-15 11:57:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:57:33,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:57:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:57:33,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:57:33,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680103699] [2023-02-15 11:57:33,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 11:57:33,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671647706] [2023-02-15 11:57:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:57:33,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:57:33,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:57:33,304 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) [2023-02-15 11:57:33,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 11:57:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:57:33,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 11:57:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:57:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:57:33,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:57:33,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671647706] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:57:33,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:57:33,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:57:33,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12115644] [2023-02-15 11:57:33,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:57:33,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:57:33,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:57:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:57:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:57:33,449 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) [2023-02-15 11:57:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:57:33,469 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2023-02-15 11:57:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:57:33,471 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 [2023-02-15 11:57:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:57:33,477 INFO L225 Difference]: With dead ends: 32 [2023-02-15 11:57:33,477 INFO L226 Difference]: Without dead ends: 13 [2023-02-15 11:57:33,480 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 [2023-02-15 11:57:33,484 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 [2023-02-15 11:57:33,485 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] [2023-02-15 11:57:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-15 11:57:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-15 11:57:33,513 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) [2023-02-15 11:57:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-15 11:57:33,515 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-02-15 11:57:33,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:57:33,515 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-15 11:57:33,516 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) [2023-02-15 11:57:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-15 11:57:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 11:57:33,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:57:33,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:57:33,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 11:57:33,724 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 [2023-02-15 11:57:33,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:57:33,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:57:33,725 INFO L85 PathProgramCache]: Analyzing trace with hash 178410715, now seen corresponding path program 1 times [2023-02-15 11:57:33,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:57:33,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199114266] [2023-02-15 11:57:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:57:33,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:57:33,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:57:33,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430189691] [2023-02-15 11:57:33,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:57:33,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:57:33,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:57:33,756 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) [2023-02-15 11:57:33,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 11:57:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:57:33,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:57:33,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:57:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:57:33,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:57:33,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:57:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199114266] [2023-02-15 11:57:33,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:57:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430189691] [2023-02-15 11:57:33,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430189691] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:57:33,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:57:33,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:57:33,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896191171] [2023-02-15 11:57:33,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:57:33,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:57:33,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:57:33,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:57:33,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:57:33,872 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) [2023-02-15 11:57:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:57:33,895 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-02-15 11:57:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:57:33,901 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 [2023-02-15 11:57:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:57:33,902 INFO L225 Difference]: With dead ends: 22 [2023-02-15 11:57:33,903 INFO L226 Difference]: Without dead ends: 15 [2023-02-15 11:57:33,903 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 [2023-02-15 11:57:33,905 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 [2023-02-15 11:57:33,906 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] [2023-02-15 11:57:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-15 11:57:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-15 11:57:33,911 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) [2023-02-15 11:57:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-15 11:57:33,912 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2023-02-15 11:57:33,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:57:33,913 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-15 11:57:33,914 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) [2023-02-15 11:57:33,914 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-15 11:57:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 11:57:33,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:57:33,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:57:33,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:57:34,115 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 [2023-02-15 11:57:34,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:57:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:57:34,117 INFO L85 PathProgramCache]: Analyzing trace with hash 180198175, now seen corresponding path program 1 times [2023-02-15 11:57:34,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:57:34,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378679076] [2023-02-15 11:57:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:57:34,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:57:34,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:57:34,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072408024] [2023-02-15 11:57:34,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:57:34,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:57:34,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:57:34,130 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) [2023-02-15 11:57:34,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 11:57:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:57:34,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 11:57:34,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:57:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:57:34,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:57:34,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:57:34,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378679076] [2023-02-15 11:57:34,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:57:34,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072408024] [2023-02-15 11:57:34,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072408024] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:57:34,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:57:34,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 11:57:34,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940077930] [2023-02-15 11:57:34,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:57:34,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:57:34,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:57:34,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:57:34,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:57:34,241 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) [2023-02-15 11:57:34,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:57:34,289 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-02-15 11:57:34,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 11:57:34,290 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 [2023-02-15 11:57:34,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:57:34,291 INFO L225 Difference]: With dead ends: 24 [2023-02-15 11:57:34,291 INFO L226 Difference]: Without dead ends: 21 [2023-02-15 11:57:34,292 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 [2023-02-15 11:57:34,295 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 [2023-02-15 11:57:34,295 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] [2023-02-15 11:57:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-15 11:57:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-15 11:57:34,306 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) [2023-02-15 11:57:34,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-02-15 11:57:34,308 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 8 [2023-02-15 11:57:34,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:57:34,308 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-02-15 11:57:34,309 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) [2023-02-15 11:57:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-02-15 11:57:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 11:57:34,309 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:57:34,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:57:34,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 11:57:34,514 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 [2023-02-15 11:57:34,515 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:57:34,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:57:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1542398814, now seen corresponding path program 1 times [2023-02-15 11:57:34,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:57:34,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250642554] [2023-02-15 11:57:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:57:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:57:34,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:57:34,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643227605] [2023-02-15 11:57:34,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:57:34,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:57:34,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:57:34,533 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) [2023-02-15 11:57:34,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 11:57:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:57:34,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 11:57:34,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:57:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:57:34,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:57:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:57:34,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:57:34,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250642554] [2023-02-15 11:57:34,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:57:34,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643227605] [2023-02-15 11:57:34,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643227605] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:57:34,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:57:34,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2023-02-15 11:57:34,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877485833] [2023-02-15 11:57:34,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:57:34,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:57:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:57:34,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:57:34,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:57:34,656 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:57:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:57:34,684 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-02-15 11:57:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:57:34,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-02-15 11:57:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:57:34,685 INFO L225 Difference]: With dead ends: 30 [2023-02-15 11:57:34,685 INFO L226 Difference]: Without dead ends: 23 [2023-02-15 11:57:34,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 11:57:34,687 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:57:34,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:57:34,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-15 11:57:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-15 11:57:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 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) [2023-02-15 11:57:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-02-15 11:57:34,691 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2023-02-15 11:57:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:57:34,692 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-02-15 11:57:34,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:57:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-02-15 11:57:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 11:57:34,693 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:57:34,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:57:34,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 11:57:34,903 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 [2023-02-15 11:57:34,903 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:57:34,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:57:34,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1540611354, now seen corresponding path program 1 times [2023-02-15 11:57:34,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:57:34,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823980967] [2023-02-15 11:57:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:57:34,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:57:34,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:57:34,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861641287] [2023-02-15 11:57:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:57:34,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:57:34,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:57:34,917 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) [2023-02-15 11:57:34,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 11:57:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:57:34,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 11:57:34,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:57:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:57:35,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:57:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:57:35,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:57:35,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823980967] [2023-02-15 11:57:35,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:57:35,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861641287] [2023-02-15 11:57:35,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861641287] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:57:35,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:57:35,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-15 11:57:35,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487023277] [2023-02-15 11:57:35,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:57:35,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 11:57:35,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:57:35,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 11:57:35,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-15 11:57:35,388 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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) [2023-02-15 11:57:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:57:35,470 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-02-15 11:57:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 11:57:35,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 [2023-02-15 11:57:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:57:35,471 INFO L225 Difference]: With dead ends: 26 [2023-02-15 11:57:35,471 INFO L226 Difference]: Without dead ends: 0 [2023-02-15 11:57:35,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:57:35,472 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:57:35,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 58 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:57:35,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-15 11:57:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-15 11:57:35,473 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) [2023-02-15 11:57:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-15 11:57:35,474 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2023-02-15 11:57:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:57:35,474 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 11:57:35,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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) [2023-02-15 11:57:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-15 11:57:35,474 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-15 11:57:35,476 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 11:57:35,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 11:57:35,677 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 [2023-02-15 11:57:35,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-15 11:57:35,719 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-15 11:57:35,719 INFO L899 garLoopResultBuilder]: For program point L44(line 44) no Hoare annotation was computed. [2023-02-15 11:57:35,719 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-15 11:57:35,719 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 24 46) the Hoare annotation is: true [2023-02-15 11:57:35,719 INFO L899 garLoopResultBuilder]: For program point L34-1(lines 34 43) no Hoare annotation was computed. [2023-02-15 11:57:35,720 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-15 11:57:35,720 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 43) the Hoare annotation is: (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) 1)) [2023-02-15 11:57:35,720 INFO L895 garLoopResultBuilder]: At program point L34-4(lines 34 43) the Hoare annotation is: (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) 1)) [2023-02-15 11:57:35,720 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-15 11:57:35,720 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) 1)) [2023-02-15 11:57:35,720 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 34 43) no Hoare annotation was computed. [2023-02-15 11:57:35,721 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2023-02-15 11:57:35,721 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2023-02-15 11:57:35,721 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2023-02-15 11:57:35,721 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2023-02-15 11:57:35,721 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2023-02-15 11:57:35,721 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-02-15 11:57:35,724 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-02-15 11:57:35,726 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 11:57:35,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 11:57:35 BoogieIcfgContainer [2023-02-15 11:57:35,736 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 11:57:35,737 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 11:57:35,737 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 11:57:35,737 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 11:57:35,738 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:57:33" (3/4) ... [2023-02-15 11:57:35,740 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-15 11:57:35,745 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-02-15 11:57:35,748 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-15 11:57:35,749 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-02-15 11:57:35,749 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-15 11:57:35,749 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-15 11:57:35,773 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 11:57:35,774 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 11:57:35,774 INFO L158 Benchmark]: Toolchain (without parser) took 3251.37ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 99.6MB in the beginning and 96.8MB in the end (delta: 2.7MB). Peak memory consumption was 30.9MB. Max. memory is 16.1GB. [2023-02-15 11:57:35,775 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 113.2MB. Free memory is still 86.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:57:35,775 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.66ms. Allocated memory is still 136.3MB. Free memory was 99.1MB in the beginning and 89.1MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 11:57:35,775 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.13ms. Allocated memory is still 136.3MB. Free memory was 89.1MB in the beginning and 87.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 11:57:35,775 INFO L158 Benchmark]: Boogie Preprocessor took 14.48ms. Allocated memory is still 136.3MB. Free memory was 87.7MB in the beginning and 86.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 11:57:35,776 INFO L158 Benchmark]: RCFGBuilder took 327.77ms. Allocated memory is still 136.3MB. Free memory was 86.5MB in the beginning and 102.1MB in the end (delta: -15.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 11:57:35,776 INFO L158 Benchmark]: TraceAbstraction took 2648.14ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 101.5MB in the beginning and 99.0MB in the end (delta: 2.4MB). Peak memory consumption was 31.4MB. Max. memory is 16.1GB. [2023-02-15 11:57:35,776 INFO L158 Benchmark]: Witness Printer took 36.78ms. Allocated memory is still 163.6MB. Free memory was 99.0MB in the beginning and 96.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 11:57:35,778 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 113.2MB. Free memory is still 86.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 191.66ms. Allocated memory is still 136.3MB. Free memory was 99.1MB in the beginning and 89.1MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.13ms. Allocated memory is still 136.3MB. Free memory was 89.1MB in the beginning and 87.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.48ms. Allocated memory is still 136.3MB. Free memory was 87.7MB in the beginning and 86.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 327.77ms. Allocated memory is still 136.3MB. Free memory was 86.5MB in the beginning and 102.1MB in the end (delta: -15.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2648.14ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 101.5MB in the beginning and 99.0MB in the end (delta: 2.4MB). Peak memory consumption was 31.4MB. Max. memory is 16.1GB. * Witness Printer took 36.78ms. Allocated memory is still 163.6MB. Free memory was 99.0MB in the beginning and 96.8MB in the end (delta: 2.2MB). 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: 17]: 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: 2.6s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19 mSDsluCounter, 200 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 130 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 97 IncrementalHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 70 mSDtfsCounter, 97 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, InterpolantAutomatonStates: 24, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 14 PreInvPairs, 24 NumberOfFragments, 35 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 75 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 62 NumberOfCodeBlocks, 62 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 267 SizeOfPredicates, 7 NumberOfNonLiveVariables, 293 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: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: y * z + x == x * z + 1 RESULT: Ultimate proved your program to be correct! [2023-02-15 11:57:35,793 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