./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.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 82dba59912342fc33baf6f71838a6b7d05440c02338f64f7b1e8151e293c49a7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 03:54:02,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 03:54:02,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 03:54:02,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 03:54:02,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 03:54:02,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 03:54:02,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 03:54:02,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 03:54:02,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 03:54:02,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 03:54:02,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 03:54:02,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 03:54:02,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 03:54:02,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 03:54:02,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 03:54:02,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 03:54:02,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 03:54:02,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 03:54:02,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 03:54:02,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 03:54:02,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 03:54:02,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 03:54:02,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 03:54:02,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 03:54:02,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 03:54:02,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 03:54:02,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 03:54:02,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 03:54:02,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 03:54:02,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 03:54:02,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 03:54:02,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 03:54:02,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 03:54:02,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 03:54:02,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 03:54:02,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 03:54:02,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 03:54:02,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 03:54:02,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 03:54:02,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 03:54:02,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 03:54:02,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 03:54:02,188 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 03:54:02,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 03:54:02,189 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 03:54:02,189 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 03:54:02,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 03:54:02,190 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 03:54:02,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 03:54:02,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 03:54:02,190 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 03:54:02,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 03:54:02,191 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 03:54:02,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 03:54:02,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 03:54:02,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 03:54:02,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 03:54:02,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 03:54:02,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 03:54:02,192 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 03:54:02,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 03:54:02,192 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 03:54:02,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 03:54:02,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 03:54:02,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 03:54:02,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 03:54:02,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 03:54:02,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 03:54:02,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 03:54:02,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 03:54:02,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 03:54:02,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 03:54:02,194 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 03:54:02,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 03:54:02,194 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 03:54:02,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 03:54:02,194 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 03:54:02,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82dba59912342fc33baf6f71838a6b7d05440c02338f64f7b1e8151e293c49a7 [2023-02-18 03:54:02,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 03:54:02,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 03:54:02,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 03:54:02,381 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 03:54:02,381 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 03:54:02,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c [2023-02-18 03:54:03,372 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 03:54:03,526 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 03:54:03,526 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c [2023-02-18 03:54:03,530 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4123fe2b2/290a6bd11abe4a86b1fc3fdc12acc8cc/FLAG2928c39fd [2023-02-18 03:54:03,543 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4123fe2b2/290a6bd11abe4a86b1fc3fdc12acc8cc [2023-02-18 03:54:03,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 03:54:03,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 03:54:03,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 03:54:03,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 03:54:03,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 03:54:03,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d1b988d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03, skipping insertion in model container [2023-02-18 03:54:03,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 03:54:03,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 03:54:03,672 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_unwindbound50.c[454,467] [2023-02-18 03:54:03,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 03:54:03,694 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 03:54:03,701 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_unwindbound50.c[454,467] [2023-02-18 03:54:03,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 03:54:03,711 INFO L208 MainTranslator]: Completed translation [2023-02-18 03:54:03,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03 WrapperNode [2023-02-18 03:54:03,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 03:54:03,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 03:54:03,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 03:54:03,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 03:54:03,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,731 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2023-02-18 03:54:03,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 03:54:03,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 03:54:03,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 03:54:03,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 03:54:03,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,744 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 03:54:03,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 03:54:03,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 03:54:03,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 03:54:03,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03" (1/1) ... [2023-02-18 03:54:03,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 03:54:03,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:54:03,768 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 03:54:03,769 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 03:54:03,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 03:54:03,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 03:54:03,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 03:54:03,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 03:54:03,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 03:54:03,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 03:54:03,832 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 03:54:03,833 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 03:54:03,905 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 03:54:03,908 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 03:54:03,908 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 03:54:03,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:54:03 BoogieIcfgContainer [2023-02-18 03:54:03,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 03:54:03,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 03:54:03,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 03:54:03,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 03:54:03,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 03:54:03" (1/3) ... [2023-02-18 03:54:03,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661cca6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:54:03, skipping insertion in model container [2023-02-18 03:54:03,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:54:03" (2/3) ... [2023-02-18 03:54:03,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661cca6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:54:03, skipping insertion in model container [2023-02-18 03:54:03,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:54:03" (3/3) ... [2023-02-18 03:54:03,915 INFO L112 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound50.c [2023-02-18 03:54:03,926 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 03:54:03,926 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 03:54:03,954 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 03:54:03,958 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;@73375805, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 03:54:03,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 03:54:03,961 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 03:54:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 03:54:03,966 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:54:03,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:54:03,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:54:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:54:03,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1819757606, now seen corresponding path program 1 times [2023-02-18 03:54:03,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:54:03,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405130906] [2023-02-18 03:54:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:54:03,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:54:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:54:04,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:54:04,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405130906] [2023-02-18 03:54:04,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 03:54:04,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758777199] [2023-02-18 03:54:04,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:54:04,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:54:04,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:54:04,113 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 03:54:04,115 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 03:54:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:54:04,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 03:54:04,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:54:04,164 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 03:54:04,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 03:54:04,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758777199] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 03:54:04,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 03:54:04,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 03:54:04,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029831255] [2023-02-18 03:54:04,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 03:54:04,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 03:54:04,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:54:04,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 03:54:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 03:54:04,190 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 03:54:04,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:54:04,201 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2023-02-18 03:54:04,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 03:54:04,202 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 03:54:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:54:04,206 INFO L225 Difference]: With dead ends: 32 [2023-02-18 03:54:04,206 INFO L226 Difference]: Without dead ends: 13 [2023-02-18 03:54:04,208 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 03:54:04,210 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 03:54:04,211 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 03:54:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-18 03:54:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-18 03:54:04,231 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 03:54:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-18 03:54:04,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-02-18 03:54:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:54:04,233 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-18 03:54:04,233 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 03:54:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-18 03:54:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 03:54:04,234 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:54:04,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:54:04,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 03:54:04,438 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 03:54:04,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:54:04,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:54:04,439 INFO L85 PathProgramCache]: Analyzing trace with hash 178410715, now seen corresponding path program 1 times [2023-02-18 03:54:04,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:54:04,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136044905] [2023-02-18 03:54:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:54:04,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:54:04,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:54:04,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232545338] [2023-02-18 03:54:04,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:54:04,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:54:04,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:54:04,463 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 03:54:04,473 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 03:54:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:54:04,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 03:54:04,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:54:04,526 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 03:54:04,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 03:54:04,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:54:04,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136044905] [2023-02-18 03:54:04,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:54:04,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232545338] [2023-02-18 03:54:04,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232545338] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 03:54:04,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 03:54:04,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 03:54:04,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781306753] [2023-02-18 03:54:04,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 03:54:04,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 03:54:04,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:54:04,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 03:54:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 03:54:04,530 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 03:54:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:54:04,539 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-02-18 03:54:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 03:54:04,540 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 03:54:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:54:04,540 INFO L225 Difference]: With dead ends: 22 [2023-02-18 03:54:04,540 INFO L226 Difference]: Without dead ends: 15 [2023-02-18 03:54:04,541 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 03:54:04,542 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 03:54:04,542 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 03:54:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-18 03:54:04,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-18 03:54:04,544 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 03:54:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-18 03:54:04,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2023-02-18 03:54:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:54:04,545 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-18 03:54:04,545 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 03:54:04,546 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-18 03:54:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 03:54:04,546 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:54:04,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:54:04,551 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 03:54:04,754 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 03:54:04,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:54:04,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:54:04,758 INFO L85 PathProgramCache]: Analyzing trace with hash 180198175, now seen corresponding path program 1 times [2023-02-18 03:54:04,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:54:04,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365204304] [2023-02-18 03:54:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:54:04,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:54:04,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:54:04,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710052364] [2023-02-18 03:54:04,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:54:04,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:54:04,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:54:04,795 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 03:54:04,812 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 03:54:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:54:04,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 03:54:04,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:54:04,861 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 03:54:04,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 03:54:04,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:54:04,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365204304] [2023-02-18 03:54:04,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:54:04,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710052364] [2023-02-18 03:54:04,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710052364] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 03:54:04,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 03:54:04,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 03:54:04,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467067437] [2023-02-18 03:54:04,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 03:54:04,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 03:54:04,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:54:04,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 03:54:04,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 03:54:04,868 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 03:54:04,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:54:04,905 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-02-18 03:54:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 03:54:04,905 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 03:54:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:54:04,906 INFO L225 Difference]: With dead ends: 24 [2023-02-18 03:54:04,906 INFO L226 Difference]: Without dead ends: 21 [2023-02-18 03:54:04,906 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 03:54:04,907 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 03:54:04,908 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 03:54:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-18 03:54:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-18 03:54:04,914 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 03:54:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-02-18 03:54:04,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 8 [2023-02-18 03:54:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:54:04,917 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-02-18 03:54:04,917 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 03:54:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-02-18 03:54:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 03:54:04,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:54:04,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:54:04,923 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 03:54:05,121 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 03:54:05,122 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:54:05,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:54:05,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1542398814, now seen corresponding path program 1 times [2023-02-18 03:54:05,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:54:05,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625368864] [2023-02-18 03:54:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:54:05,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:54:05,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:54:05,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101385847] [2023-02-18 03:54:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:54:05,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:54:05,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:54:05,142 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 03:54:05,144 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 03:54:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:54:05,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 03:54:05,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:54:05,191 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 03:54:05,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:54:05,216 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 03:54:05,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:54:05,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625368864] [2023-02-18 03:54:05,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:54:05,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101385847] [2023-02-18 03:54:05,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101385847] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 03:54:05,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 03:54:05,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 03:54:05,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274357366] [2023-02-18 03:54:05,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 03:54:05,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 03:54:05,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:54:05,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 03:54:05,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 03:54:05,219 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 03:54:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:54:05,255 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-02-18 03:54:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 03:54:05,256 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 03:54:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:54:05,257 INFO L225 Difference]: With dead ends: 52 [2023-02-18 03:54:05,257 INFO L226 Difference]: Without dead ends: 45 [2023-02-18 03:54:05,258 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 03:54:05,258 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 03:54:05,259 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 03:54:05,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-18 03:54:05,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2023-02-18 03:54:05,263 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 03:54:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-02-18 03:54:05,264 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 16 [2023-02-18 03:54:05,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:54:05,264 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-02-18 03:54:05,265 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 03:54:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-02-18 03:54:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 03:54:05,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:54:05,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:54:05,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 03:54:05,470 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 03:54:05,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:54:05,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:54:05,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1540611354, now seen corresponding path program 1 times [2023-02-18 03:54:05,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:54:05,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826530304] [2023-02-18 03:54:05,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:54:05,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:54:05,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:54:05,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788220125] [2023-02-18 03:54:05,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:54:05,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:54:05,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:54:05,480 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 03:54:05,482 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 03:54:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:54:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 03:54:05,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:54:05,564 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 03:54:05,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:54:05,641 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 03:54:05,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:54:05,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826530304] [2023-02-18 03:54:05,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:54:05,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788220125] [2023-02-18 03:54:05,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788220125] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 03:54:05,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 03:54:05,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-18 03:54:05,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024687381] [2023-02-18 03:54:05,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 03:54:05,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 03:54:05,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:54:05,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 03:54:05,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 03:54:05,644 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 03:54:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:54:05,682 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-02-18 03:54:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 03:54:05,682 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 03:54:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:54:05,683 INFO L225 Difference]: With dead ends: 41 [2023-02-18 03:54:05,683 INFO L226 Difference]: Without dead ends: 0 [2023-02-18 03:54:05,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-18 03:54:05,684 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 03:54:05,684 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 03:54:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-18 03:54:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-18 03:54:05,689 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 03:54:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-18 03:54:05,690 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2023-02-18 03:54:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:54:05,690 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-18 03:54:05,690 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 03:54:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-18 03:54:05,690 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-18 03:54:05,692 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-18 03:54:05,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 03:54:05,897 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 03:54:05,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-18 03:54:05,913 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-18 03:54:05,913 INFO L899 garLoopResultBuilder]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2023-02-18 03:54:05,913 INFO L895 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse0 (= (+ |ULTIMATE.start_main_~y~0#1| (+ (- (* 2 |ULTIMATE.start_main_~x~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) 0))) (or (and .cse0 (< (+ ~counter~0 1) 50)) (and .cse0 (< ~counter~0 50)) .cse0 (and (= |ULTIMATE.start_main_~y~0#1| 0) (<= ~counter~0 0) (= |ULTIMATE.start_main_~x~0#1| 0)) (and (<= (+ ~counter~0 (- 1)) 0) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~y~0#1| 0)) (= |ULTIMATE.start_main_~y~0#1| (+ 0 1))))) [2023-02-18 03:54:05,913 INFO L895 garLoopResultBuilder]: At program point L27-4(lines 27 36) the Hoare annotation is: (let ((.cse0 (= (+ |ULTIMATE.start_main_~y~0#1| (+ (- (* 2 |ULTIMATE.start_main_~x~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) 0))) (or (and (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~y~0#1| 0)) (= |ULTIMATE.start_main_~y~0#1| (+ 0 1)) (< (+ ~counter~0 1) 50)) (and .cse0 (< ~counter~0 50)) .cse0 (and (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0)))) [2023-02-18 03:54:05,913 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-18 03:54:05,914 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 18 40) the Hoare annotation is: true [2023-02-18 03:54:05,914 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-18 03:54:05,914 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-18 03:54:05,914 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (= (+ |ULTIMATE.start_main_~y~0#1| (+ (- (* 2 |ULTIMATE.start_main_~x~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) 0))) (or (and (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~y~0#1| 0)) (= |ULTIMATE.start_main_~y~0#1| (+ 0 1)) (< (+ ~counter~0 1) 50)) (and .cse0 (< ~counter~0 50)) .cse0 (and (<= (+ ~counter~0 (- 1)) 0) (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0)))) [2023-02-18 03:54:05,914 INFO L899 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2023-02-18 03:54:05,914 INFO L899 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2023-02-18 03:54:05,914 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2023-02-18 03:54:05,915 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2023-02-18 03:54:05,915 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2023-02-18 03:54:05,915 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 15) the Hoare annotation is: (let ((.cse2 (= |__VERIFIER_assert_#in~cond| 1))) (let ((.cse1 (not .cse2))) (and (let ((.cse0 (<= (+ ~counter~0 (- 1)) 0))) (or (not .cse0) .cse1 (and .cse0 .cse2))) (let ((.cse3 (< ~counter~0 50))) (or .cse1 (and .cse2 .cse3) (not .cse3))) (let ((.cse4 (< (+ ~counter~0 1) 50))) (or (not .cse4) .cse1 (and .cse4 .cse2)))))) [2023-02-18 03:54:05,915 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2023-02-18 03:54:05,915 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2023-02-18 03:54:05,917 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-02-18 03:54:05,919 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 03:54:05,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 03:54:05 BoogieIcfgContainer [2023-02-18 03:54:05,933 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 03:54:05,934 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 03:54:05,934 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 03:54:05,934 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 03:54:05,935 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:54:03" (3/4) ... [2023-02-18 03:54:05,937 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-18 03:54:05,941 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-02-18 03:54:05,943 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-18 03:54:05,943 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-02-18 03:54:05,943 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-18 03:54:05,944 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-18 03:54:05,968 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 03:54:05,968 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 03:54:05,969 INFO L158 Benchmark]: Toolchain (without parser) took 2422.61ms. Allocated memory is still 174.1MB. Free memory was 127.0MB in the beginning and 72.5MB in the end (delta: 54.4MB). Peak memory consumption was 57.4MB. Max. memory is 16.1GB. [2023-02-18 03:54:05,970 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 134.2MB. Free memory is still 79.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 03:54:05,971 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.74ms. Allocated memory is still 174.1MB. Free memory was 127.0MB in the beginning and 116.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 03:54:05,971 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.07ms. Allocated memory is still 174.1MB. Free memory was 116.5MB in the beginning and 115.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 03:54:05,971 INFO L158 Benchmark]: Boogie Preprocessor took 13.04ms. Allocated memory is still 174.1MB. Free memory was 115.3MB in the beginning and 114.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 03:54:05,971 INFO L158 Benchmark]: RCFGBuilder took 164.14ms. Allocated memory is still 174.1MB. Free memory was 114.1MB in the beginning and 104.8MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 03:54:05,972 INFO L158 Benchmark]: TraceAbstraction took 2022.76ms. Allocated memory is still 174.1MB. Free memory was 103.9MB in the beginning and 75.6MB in the end (delta: 28.3MB). Peak memory consumption was 30.1MB. Max. memory is 16.1GB. [2023-02-18 03:54:05,972 INFO L158 Benchmark]: Witness Printer took 34.03ms. Allocated memory is still 174.1MB. Free memory was 74.6MB in the beginning and 72.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 03:54:05,973 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 134.2MB. Free memory is still 79.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 162.74ms. Allocated memory is still 174.1MB. Free memory was 127.0MB in the beginning and 116.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.07ms. Allocated memory is still 174.1MB. Free memory was 116.5MB in the beginning and 115.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.04ms. Allocated memory is still 174.1MB. Free memory was 115.3MB in the beginning and 114.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 164.14ms. Allocated memory is still 174.1MB. Free memory was 114.1MB in the beginning and 104.8MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2022.76ms. Allocated memory is still 174.1MB. Free memory was 103.9MB in the beginning and 75.6MB in the end (delta: 28.3MB). Peak memory consumption was 30.1MB. Max. memory is 16.1GB. * Witness Printer took 34.03ms. Allocated memory is still 174.1MB. Free memory was 74.6MB in the beginning and 72.5MB in the end (delta: 2.1MB). 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: 2.0s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, 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, 58 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 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, 0.2s 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: ((((y + (-(2 * x) + y * y) == 0 && counter + 1 < 50) || (y + (-(2 * x) + y * y) == 0 && counter < 50)) || y + (-(2 * x) + y * y) == 0) || ((y == 0 && counter <= 0) && x == 0)) || ((counter + -1 <= 0 && x == y + 0) && y == 0 + 1) RESULT: Ultimate proved your program to be correct! [2023-02-18 03:54:06,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE