./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.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/hard-u_valuebound2.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 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:04:24,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:04:24,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:04:24,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:04:24,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:04:24,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:04:24,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:04:24,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:04:24,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:04:24,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:04:24,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:04:24,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:04:24,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:04:24,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:04:24,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:04:24,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:04:24,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:04:24,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:04:24,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:04:24,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:04:24,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:04:24,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:04:24,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:04:24,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:04:24,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:04:24,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:04:24,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:04:24,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:04:24,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:04:24,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:04:24,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:04:24,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:04:24,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:04:24,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:04:24,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:04:24,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:04:24,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:04:24,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:04:24,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:04:24,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:04:24,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:04:24,963 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 21:04:24,980 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:04:24,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:04:24,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:04:24,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:04:24,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:04:24,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:04:24,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:04:24,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:04:24,985 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:04:24,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:04:24,985 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:04:24,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:04:24,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:04:24,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:04:24,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 21:04:24,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:04:24,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 21:04:24,986 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:04:24,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 21:04:24,986 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:04:24,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 21:04:24,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:04:24,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:04:24,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:04:24,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:04:24,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:04:24,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:04:24,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 21:04:24,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:04:24,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:04:24,988 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:04:24,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 21:04:24,988 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:04:24,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:04:24,989 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:04:24,989 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 [2023-02-15 21:04:25,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:04:25,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:04:25,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:04:25,201 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:04:25,202 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:04:25,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2023-02-15 21:04:26,124 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:04:26,269 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:04:26,270 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2023-02-15 21:04:26,273 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc152603b/7ae1edd2192f446e923ee84941ff5252/FLAG2dbb3b1f6 [2023-02-15 21:04:26,282 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc152603b/7ae1edd2192f446e923ee84941ff5252 [2023-02-15 21:04:26,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:04:26,284 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:04:26,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:04:26,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:04:26,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:04:26,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6769b224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26, skipping insertion in model container [2023-02-15 21:04:26,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:04:26,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:04:26,406 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/hard-u_valuebound2.c[537,550] [2023-02-15 21:04:26,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:04:26,438 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:04:26,448 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/hard-u_valuebound2.c[537,550] [2023-02-15 21:04:26,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:04:26,470 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:04:26,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26 WrapperNode [2023-02-15 21:04:26,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:04:26,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:04:26,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:04:26,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:04:26,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,501 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2023-02-15 21:04:26,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:04:26,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:04:26,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:04:26,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:04:26,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,531 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:04:26,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:04:26,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:04:26,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:04:26,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26" (1/1) ... [2023-02-15 21:04:26,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:04:26,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:04:26,556 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 21:04:26,562 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 21:04:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:04:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 21:04:26,588 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 21:04:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:04:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:04:26,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:04:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 21:04:26,589 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 21:04:26,634 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:04:26,636 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:04:26,805 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:04:26,809 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:04:26,809 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 21:04:26,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:04:26 BoogieIcfgContainer [2023-02-15 21:04:26,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:04:26,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:04:26,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:04:26,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:04:26,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:04:26" (1/3) ... [2023-02-15 21:04:26,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef25046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:04:26, skipping insertion in model container [2023-02-15 21:04:26,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:26" (2/3) ... [2023-02-15 21:04:26,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef25046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:04:26, skipping insertion in model container [2023-02-15 21:04:26,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:04:26" (3/3) ... [2023-02-15 21:04:26,827 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound2.c [2023-02-15 21:04:26,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:04:26,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 21:04:26,884 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:04:26,888 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;@5063bd70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:04:26,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 21:04:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 21:04:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 21:04:26,896 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:26,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:26,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:26,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:26,900 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2023-02-15 21:04:26,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:26,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817852666] [2023-02-15 21:04:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:26,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:26,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:04:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:26,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:04:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:26,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-15 21:04:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:04:26,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:27,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817852666] [2023-02-15 21:04:27,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817852666] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:04:27,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:04:27,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:04:27,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649612193] [2023-02-15 21:04:27,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:04:27,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 21:04:27,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:27,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 21:04:27,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 21:04:27,031 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 21:04:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:27,046 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2023-02-15 21:04:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 21:04:27,047 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-02-15 21:04:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:27,051 INFO L225 Difference]: With dead ends: 63 [2023-02-15 21:04:27,052 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 21:04:27,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 21:04:27,056 INFO L413 NwaCegarLoop]: 43 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, 43 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 21:04:27,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:04:27,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 21:04:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-15 21:04:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 21:04:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-02-15 21:04:27,089 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2023-02-15 21:04:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:27,089 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-02-15 21:04:27,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 21:04:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-02-15 21:04:27,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 21:04:27,091 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:27,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:27,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 21:04:27,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:27,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:27,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2023-02-15 21:04:27,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:27,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679905904] [2023-02-15 21:04:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:27,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:27,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:04:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:27,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:04:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:27,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-15 21:04:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:04:27,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:27,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679905904] [2023-02-15 21:04:27,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679905904] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:04:27,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:04:27,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:04:27,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656910864] [2023-02-15 21:04:27,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:04:27,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:04:27,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:27,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:04:27,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:04:27,259 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 21:04:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:27,296 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-15 21:04:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:04:27,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-02-15 21:04:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:27,298 INFO L225 Difference]: With dead ends: 42 [2023-02-15 21:04:27,298 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 21:04:27,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:04:27,299 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:04:27,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:04:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 21:04:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-15 21:04:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 21:04:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-15 21:04:27,307 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2023-02-15 21:04:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:27,307 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-15 21:04:27,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 21:04:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-15 21:04:27,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 21:04:27,308 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:27,309 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:27,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 21:04:27,309 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2023-02-15 21:04:27,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:27,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48680278] [2023-02-15 21:04:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:27,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:27,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:04:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:27,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 21:04:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:27,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-15 21:04:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:27,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 21:04:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:04:27,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:27,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48680278] [2023-02-15 21:04:27,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48680278] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:04:27,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:04:27,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:04:27,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980174171] [2023-02-15 21:04:27,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:04:27,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:04:27,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:27,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:04:27,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:04:27,553 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:04:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:27,638 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-02-15 21:04:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:04:27,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-02-15 21:04:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:27,639 INFO L225 Difference]: With dead ends: 46 [2023-02-15 21:04:27,640 INFO L226 Difference]: Without dead ends: 44 [2023-02-15 21:04:27,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:04:27,651 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:04:27,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:04:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-15 21:04:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-02-15 21:04:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 21:04:27,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-02-15 21:04:27,665 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2023-02-15 21:04:27,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:27,667 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-02-15 21:04:27,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:04:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-02-15 21:04:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 21:04:27,668 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:27,669 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:27,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 21:04:27,669 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:27,670 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2023-02-15 21:04:27,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:27,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88439923] [2023-02-15 21:04:27,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:27,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:27,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:04:27,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120828880] [2023-02-15 21:04:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:27,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:27,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:04:27,691 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 21:04:27,692 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 21:04:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:27,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 21:04:27,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:04:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 21:04:27,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:04:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 21:04:28,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:28,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88439923] [2023-02-15 21:04:28,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:04:28,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120828880] [2023-02-15 21:04:28,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120828880] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:04:28,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:04:28,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-15 21:04:28,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529561080] [2023-02-15 21:04:28,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:04:28,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 21:04:28,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:28,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 21:04:28,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:04:28,038 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 21:04:30,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:04:32,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:04:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:33,831 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2023-02-15 21:04:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:04:33,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 34 [2023-02-15 21:04:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:33,834 INFO L225 Difference]: With dead ends: 76 [2023-02-15 21:04:33,834 INFO L226 Difference]: Without dead ends: 62 [2023-02-15 21:04:33,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:04:33,835 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-02-15 21:04:33,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 164 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 256 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2023-02-15 21:04:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-15 21:04:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-02-15 21:04:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 38 states have internal predecessors, (39), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-15 21:04:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-02-15 21:04:33,848 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 34 [2023-02-15 21:04:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:33,848 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-02-15 21:04:33,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 21:04:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-02-15 21:04:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 21:04:33,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:33,849 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:33,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 21:04:34,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:34,054 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:34,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2023-02-15 21:04:34,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:34,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684046246] [2023-02-15 21:04:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:34,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:34,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:04:34,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038450624] [2023-02-15 21:04:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:34,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:34,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:04:34,075 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 21:04:34,077 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 21:04:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:34,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 21:04:34,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:04:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 21:04:34,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:04:34,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:34,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684046246] [2023-02-15 21:04:34,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:04:34,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038450624] [2023-02-15 21:04:34,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038450624] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:04:34,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:04:34,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 21:04:34,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153579787] [2023-02-15 21:04:34,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:04:34,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 21:04:34,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:34,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 21:04:34,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:04:34,329 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 21:04:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:34,711 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2023-02-15 21:04:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:04:34,712 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2023-02-15 21:04:34,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:34,713 INFO L225 Difference]: With dead ends: 72 [2023-02-15 21:04:34,713 INFO L226 Difference]: Without dead ends: 61 [2023-02-15 21:04:34,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:04:34,714 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:04:34,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 147 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:04:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-15 21:04:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-02-15 21:04:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-15 21:04:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-02-15 21:04:34,729 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 41 [2023-02-15 21:04:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:34,729 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-02-15 21:04:34,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 21:04:34,729 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-02-15 21:04:34,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 21:04:34,730 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:34,730 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:34,740 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 21:04:34,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:34,931 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:34,931 INFO L85 PathProgramCache]: Analyzing trace with hash -421337323, now seen corresponding path program 1 times [2023-02-15 21:04:34,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:34,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604276332] [2023-02-15 21:04:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:34,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:34,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:04:34,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391204669] [2023-02-15 21:04:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:34,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:34,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:04:34,939 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 21:04:34,941 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 21:04:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:34,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 21:04:34,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:04:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 21:04:35,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:04:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-15 21:04:36,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:36,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604276332] [2023-02-15 21:04:36,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:04:36,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391204669] [2023-02-15 21:04:36,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391204669] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:04:36,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:04:36,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-02-15 21:04:36,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545439731] [2023-02-15 21:04:36,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:04:36,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 21:04:36,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:36,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 21:04:36,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-02-15 21:04:36,532 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-15 21:04:38,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:38,718 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2023-02-15 21:04:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 21:04:38,719 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 58 [2023-02-15 21:04:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:38,720 INFO L225 Difference]: With dead ends: 76 [2023-02-15 21:04:38,721 INFO L226 Difference]: Without dead ends: 74 [2023-02-15 21:04:38,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:04:38,721 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:04:38,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 106 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-15 21:04:38,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-15 21:04:38,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2023-02-15 21:04:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 47 states have internal predecessors, (48), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-15 21:04:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2023-02-15 21:04:38,733 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 58 [2023-02-15 21:04:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:38,733 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2023-02-15 21:04:38,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-15 21:04:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2023-02-15 21:04:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 21:04:38,734 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:38,735 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:38,747 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 21:04:38,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:38,941 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:38,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:38,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1609951834, now seen corresponding path program 1 times [2023-02-15 21:04:38,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:38,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057246941] [2023-02-15 21:04:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:38,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:38,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:04:38,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418600643] [2023-02-15 21:04:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:38,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:38,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:04:38,951 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 21:04:38,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 21:04:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:39,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 21:04:39,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:04:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-15 21:04:39,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:04:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-02-15 21:04:40,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:04:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057246941] [2023-02-15 21:04:40,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:04:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418600643] [2023-02-15 21:04:40,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418600643] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:04:40,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:04:40,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 18 [2023-02-15 21:04:40,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198918997] [2023-02-15 21:04:40,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:04:40,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 21:04:40,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:04:40,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 21:04:40,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-02-15 21:04:40,343 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-15 21:04:47,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:04:48,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:04:51,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:04:53,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:04:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:04:56,046 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2023-02-15 21:04:56,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:04:56,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) Word has length 68 [2023-02-15 21:04:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:04:56,048 INFO L225 Difference]: With dead ends: 111 [2023-02-15 21:04:56,048 INFO L226 Difference]: Without dead ends: 99 [2023-02-15 21:04:56,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-02-15 21:04:56,049 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:04:56,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 183 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2023-02-15 21:04:56,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-15 21:04:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2023-02-15 21:04:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 53 states have (on average 1.169811320754717) internal successors, (62), 59 states have internal predecessors, (62), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-15 21:04:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 123 transitions. [2023-02-15 21:04:56,065 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 123 transitions. Word has length 68 [2023-02-15 21:04:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:04:56,065 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 123 transitions. [2023-02-15 21:04:56,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-15 21:04:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 123 transitions. [2023-02-15 21:04:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 21:04:56,067 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:04:56,067 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:04:56,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 21:04:56,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:56,272 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:04:56,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:04:56,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2023-02-15 21:04:56,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:04:56,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442540850] [2023-02-15 21:04:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:56,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:04:56,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:04:56,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128126243] [2023-02-15 21:04:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:04:56,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:04:56,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:04:56,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:04:56,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 21:04:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:04:57,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 21:04:57,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:04:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-15 21:04:57,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:19,520 WARN L233 SmtUtils]: Spent 18.35s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:07:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 35 proven. 22 refuted. 2 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-15 21:07:56,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:07:56,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442540850] [2023-02-15 21:07:56,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:07:56,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128126243] [2023-02-15 21:07:56,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128126243] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:07:56,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:07:56,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-02-15 21:07:56,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681862132] [2023-02-15 21:07:56,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:07:56,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 21:07:56,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:07:56,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 21:07:56,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=436, Unknown=19, NotChecked=0, Total=552 [2023-02-15 21:07:56,852 INFO L87 Difference]: Start difference. First operand 94 states and 123 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 20 states have internal predecessors, (41), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) [2023-02-15 21:07:59,292 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 21:08:01,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:04,246 WARN L539 Checker$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 21:08:08,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:10,557 WARN L539 Checker$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 21:08:12,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:14,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:16,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:19,008 WARN L539 Checker$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 21:08:21,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:24,156 WARN L539 Checker$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 21:08:25,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:28,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:30,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:33,329 WARN L539 Checker$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 21:08:39,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:41,193 WARN L539 Checker$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 21:08:44,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:47,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:49,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:54,426 WARN L539 Checker$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 21:08:55,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []