./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/lcm1_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 6ac61a60e8702da390cdc74b87fa3424e0fd152a4ccfcd2c9fd7af24a4bb7ac5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:15:49,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:15:49,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:15:49,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:15:49,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:15:49,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:15:49,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:15:49,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:15:49,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:15:49,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:15:49,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:15:49,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:15:49,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:15:49,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:15:49,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:15:49,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:15:49,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:15:49,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:15:49,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:15:49,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:15:49,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:15:49,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:15:49,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:15:49,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:15:49,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:15:49,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:15:49,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:15:49,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:15:49,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:15:49,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:15:49,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:15:49,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:15:49,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:15:49,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:15:49,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:15:49,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:15:49,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:15:49,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:15:49,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:15:49,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:15:49,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:15:49,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 21:15:49,653 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:15:49,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:15:49,654 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:15:49,654 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:15:49,655 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:15:49,655 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:15:49,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:15:49,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:15:49,655 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:15:49,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:15:49,656 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:15:49,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:15:49,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:15:49,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:15:49,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 21:15:49,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:15:49,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 21:15:49,657 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:15:49,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 21:15:49,658 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:15:49,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 21:15:49,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:15:49,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:15:49,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:15:49,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:15:49,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:15:49,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:15:49,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 21:15:49,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:15:49,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:15:49,659 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:15:49,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 21:15:49,660 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:15:49,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:15:49,660 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:15:49,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac61a60e8702da390cdc74b87fa3424e0fd152a4ccfcd2c9fd7af24a4bb7ac5 [2023-02-15 21:15:49,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:15:49,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:15:49,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:15:49,878 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:15:49,879 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:15:49,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound50.c [2023-02-15 21:15:50,885 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:15:51,014 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:15:51,014 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound50.c [2023-02-15 21:15:51,019 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11eb9e79a/07a878e19571415c9b3946de98fedec8/FLAG9793b4954 [2023-02-15 21:15:51,036 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11eb9e79a/07a878e19571415c9b3946de98fedec8 [2023-02-15 21:15:51,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:15:51,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:15:51,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:15:51,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:15:51,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:15:51,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f9c23c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51, skipping insertion in model container [2023-02-15 21:15:51,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:15:51,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:15:51,154 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/lcm1_unwindbound50.c[552,565] [2023-02-15 21:15:51,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:15:51,171 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:15:51,179 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/lcm1_unwindbound50.c[552,565] [2023-02-15 21:15:51,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:15:51,193 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:15:51,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51 WrapperNode [2023-02-15 21:15:51,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:15:51,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:15:51,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:15:51,194 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:15:51,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,214 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-02-15 21:15:51,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:15:51,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:15:51,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:15:51,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:15:51,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,226 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:15:51,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:15:51,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:15:51,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:15:51,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51" (1/1) ... [2023-02-15 21:15:51,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:15:51,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:15:51,253 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 21:15:51,260 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 21:15:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:15:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 21:15:51,286 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 21:15:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:15:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:15:51,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:15:51,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 21:15:51,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 21:15:51,334 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:15:51,336 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:15:51,442 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:15:51,451 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:15:51,453 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 21:15:51,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:15:51 BoogieIcfgContainer [2023-02-15 21:15:51,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:15:51,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:15:51,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:15:51,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:15:51,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:15:51" (1/3) ... [2023-02-15 21:15:51,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da31dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:15:51, skipping insertion in model container [2023-02-15 21:15:51,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:15:51" (2/3) ... [2023-02-15 21:15:51,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da31dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:15:51, skipping insertion in model container [2023-02-15 21:15:51,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:15:51" (3/3) ... [2023-02-15 21:15:51,463 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound50.c [2023-02-15 21:15:51,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:15:51,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 21:15:51,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:15:51,524 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;@2b7e4abc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:15:51,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 21:15:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 21:15:51,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 21:15:51,533 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:15:51,533 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:15:51,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:15:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:15:51,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1730809867, now seen corresponding path program 1 times [2023-02-15 21:15:51,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:15:51,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665803464] [2023-02-15 21:15:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:15:51,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:15:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:15:51,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:15:51,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665803464] [2023-02-15 21:15:51,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 21:15:51,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444866596] [2023-02-15 21:15:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:15:51,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:15:51,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:15:51,646 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 21:15:51,648 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 21:15:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:15:51,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 21:15:51,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:15:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 21:15:51,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:15:51,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444866596] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:15:51,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:15:51,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:15:51,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87458259] [2023-02-15 21:15:51,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:15:51,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 21:15:51,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:15:51,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 21:15:51,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 21:15:51,805 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:15:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:15:51,824 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2023-02-15 21:15:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 21:15:51,825 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-02-15 21:15:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:15:51,851 INFO L225 Difference]: With dead ends: 67 [2023-02-15 21:15:51,851 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 21:15:51,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 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 21:15:51,856 INFO L413 NwaCegarLoop]: 47 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, 47 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 21:15:51,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:15:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 21:15:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-15 21:15:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 21:15:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2023-02-15 21:15:51,884 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 28 [2023-02-15 21:15:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:15:51,885 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2023-02-15 21:15:51,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:15:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2023-02-15 21:15:51,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 21:15:51,887 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:15:51,887 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:15:51,895 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 21:15:52,091 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 21:15:52,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:15:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:15:52,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1744809392, now seen corresponding path program 1 times [2023-02-15 21:15:52,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:15:52,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779588000] [2023-02-15 21:15:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:15:52,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:15:52,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:15:52,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397990007] [2023-02-15 21:15:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:15:52,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:15:52,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:15:52,125 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 21:15:52,128 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 21:15:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:15:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 21:15:52,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:15:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:15:52,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:15:52,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:15:52,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779588000] [2023-02-15 21:15:52,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:15:52,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397990007] [2023-02-15 21:15:52,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397990007] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:15:52,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:15:52,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 21:15:52,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970529074] [2023-02-15 21:15:52,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:15:52,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:15:52,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:15:52,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:15:52,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:15:52,381 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:15:54,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:15:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:15:54,759 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2023-02-15 21:15:54,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:15:54,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-02-15 21:15:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:15:54,761 INFO L225 Difference]: With dead ends: 51 [2023-02-15 21:15:54,761 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 21:15:54,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:15:54,762 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:15:54,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 141 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-02-15 21:15:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 21:15:54,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2023-02-15 21:15:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 21:15:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2023-02-15 21:15:54,774 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 67 transitions. Word has length 29 [2023-02-15 21:15:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:15:54,775 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 67 transitions. [2023-02-15 21:15:54,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:15:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 67 transitions. [2023-02-15 21:15:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 21:15:54,777 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:15:54,777 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:15:54,787 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 21:15:54,982 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 21:15:54,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:15:54,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:15:54,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1746477688, now seen corresponding path program 1 times [2023-02-15 21:15:54,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:15:54,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791358452] [2023-02-15 21:15:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:15:54,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:15:54,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:15:54,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715692354] [2023-02-15 21:15:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:15:54,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:15:54,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:15:55,000 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 21:15:55,002 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 21:15:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:15:55,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 21:15:55,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:15:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 21:15:55,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:15:55,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:15:55,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791358452] [2023-02-15 21:15:55,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:15:55,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715692354] [2023-02-15 21:15:55,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715692354] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:15:55,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:15:55,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:15:55,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288656412] [2023-02-15 21:15:55,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:15:55,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:15:55,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:15:55,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:15:55,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:15:55,080 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:15:55,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:15:55,103 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2023-02-15 21:15:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:15:55,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-02-15 21:15:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:15:55,105 INFO L225 Difference]: With dead ends: 57 [2023-02-15 21:15:55,105 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 21:15:55,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 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 21:15:55,106 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:15:55,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:15:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 21:15:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-02-15 21:15:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 21:15:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2023-02-15 21:15:55,117 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 29 [2023-02-15 21:15:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:15:55,117 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2023-02-15 21:15:55,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:15:55,118 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2023-02-15 21:15:55,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 21:15:55,118 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:15:55,118 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:15:55,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 21:15:55,323 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 21:15:55,323 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:15:55,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:15:55,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1754973556, now seen corresponding path program 1 times [2023-02-15 21:15:55,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:15:55,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640805408] [2023-02-15 21:15:55,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:15:55,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:15:55,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:15:55,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646036691] [2023-02-15 21:15:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:15:55,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:15:55,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:15:55,337 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 21:15:55,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process