./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-ll_valuebound100.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 e3523bc8254ad35e64aad06fd6e3c84672a9aa19521e18482795d6584edb45d0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 16:15:25,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 16:15:25,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 16:15:25,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 16:15:25,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 16:15:25,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 16:15:25,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 16:15:25,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 16:15:25,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 16:15:25,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 16:15:25,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 16:15:25,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 16:15:25,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 16:15:25,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 16:15:25,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 16:15:25,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 16:15:25,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 16:15:25,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 16:15:25,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 16:15:25,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 16:15:25,475 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 16:15:25,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 16:15:25,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 16:15:25,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 16:15:25,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 16:15:25,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 16:15:25,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 16:15:25,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 16:15:25,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 16:15:25,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 16:15:25,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 16:15:25,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 16:15:25,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 16:15:25,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 16:15:25,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 16:15:25,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 16:15:25,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 16:15:25,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 16:15:25,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 16:15:25,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 16:15:25,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 16:15:25,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 16:15:25,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 16:15:25,565 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 16:15:25,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 16:15:25,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 16:15:25,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 16:15:25,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 16:15:25,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 16:15:25,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 16:15:25,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 16:15:25,582 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 16:15:25,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 16:15:25,584 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 16:15:25,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 16:15:25,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 16:15:25,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 16:15:25,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 16:15:25,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 16:15:25,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 16:15:25,585 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 16:15:25,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 16:15:25,585 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 16:15:25,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 16:15:25,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 16:15:25,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 16:15:25,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 16:15:25,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:15:25,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 16:15:25,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 16:15:25,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 16:15:25,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 16:15:25,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 16:15:25,588 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 16:15:25,588 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 16:15:25,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 16:15:25,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3523bc8254ad35e64aad06fd6e3c84672a9aa19521e18482795d6584edb45d0 [2022-07-22 16:15:26,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 16:15:26,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 16:15:26,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 16:15:26,169 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 16:15:26,169 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 16:15:26,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2022-07-22 16:15:26,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/160a3ddcb/826e76c24643450f955731ececef34fb/FLAG1ac8492e4 [2022-07-22 16:15:26,915 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 16:15:26,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2022-07-22 16:15:26,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/160a3ddcb/826e76c24643450f955731ececef34fb/FLAG1ac8492e4 [2022-07-22 16:15:26,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/160a3ddcb/826e76c24643450f955731ececef34fb [2022-07-22 16:15:26,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 16:15:26,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 16:15:26,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 16:15:26,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 16:15:26,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 16:15:26,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:15:26" (1/1) ... [2022-07-22 16:15:26,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53bb233f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:26, skipping insertion in model container [2022-07-22 16:15:26,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:15:26" (1/1) ... [2022-07-22 16:15:26,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 16:15:26,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 16:15:27,110 WARN L230 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-ll_valuebound100.c[538,551] [2022-07-22 16:15:27,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:15:27,152 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 16:15:27,165 WARN L230 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-ll_valuebound100.c[538,551] [2022-07-22 16:15:27,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:15:27,199 INFO L208 MainTranslator]: Completed translation [2022-07-22 16:15:27,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:27 WrapperNode [2022-07-22 16:15:27,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 16:15:27,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 16:15:27,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 16:15:27,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 16:15:27,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:27" (1/1) ... [2022-07-22 16:15:27,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:27" (1/1) ... [2022-07-22 16:15:27,234 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-07-22 16:15:27,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 16:15:27,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 16:15:27,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 16:15:27,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 16:15:27,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:27" (1/1) ... [2022-07-22 16:15:27,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:27" (1/1) ... [2022-07-22 16:15:27,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:27" (1/1) ... [2022-07-22 16:15:27,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:27" (1/1) ... [2022-07-22 16:15:27,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:27" (1/1) ... [2022-07-22 16:15:27,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:27" (1/1) ... [2022-07-22 16:15:27,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:27" (1/1) ... [2022-07-22 16:15:27,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 16:15:27,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 16:15:27,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 16:15:27,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 16:15:27,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:27" (1/1) ... [2022-07-22 16:15:27,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:15:27,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:15:27,295 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) [2022-07-22 16:15:27,299 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 [2022-07-22 16:15:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 16:15:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 16:15:27,330 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 16:15:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 16:15:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 16:15:27,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 16:15:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 16:15:27,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 16:15:27,404 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 16:15:27,406 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 16:15:27,642 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 16:15:27,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 16:15:27,656 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 16:15:27,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:15:27 BoogieIcfgContainer [2022-07-22 16:15:27,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 16:15:27,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 16:15:27,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 16:15:27,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 16:15:27,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 04:15:26" (1/3) ... [2022-07-22 16:15:27,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b8c54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:15:27, skipping insertion in model container [2022-07-22 16:15:27,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:15:27" (2/3) ... [2022-07-22 16:15:27,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b8c54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:15:27, skipping insertion in model container [2022-07-22 16:15:27,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:15:27" (3/3) ... [2022-07-22 16:15:27,677 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.c [2022-07-22 16:15:27,688 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 16:15:27,688 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 16:15:27,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 16:15:27,739 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4bfba71b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@551f064a [2022-07-22 16:15:27,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 16:15:27,749 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) [2022-07-22 16:15:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 16:15:27,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:27,761 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:15:27,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:27,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:27,766 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2022-07-22 16:15:27,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:27,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810257544] [2022-07-22 16:15:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:27,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:27,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:15:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:27,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:15:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:27,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:15:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:15:27,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:15:27,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810257544] [2022-07-22 16:15:27,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810257544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:15:27,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:15:27,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 16:15:27,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208822499] [2022-07-22 16:15:27,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:15:27,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 16:15:27,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:15:28,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 16:15:28,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:15:28,010 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) [2022-07-22 16:15:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:15:28,035 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2022-07-22 16:15:28,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 16:15:28,038 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 [2022-07-22 16:15:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:15:28,045 INFO L225 Difference]: With dead ends: 63 [2022-07-22 16:15:28,045 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 16:15:28,049 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 [2022-07-22 16:15:28,052 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 [2022-07-22 16:15:28,053 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] [2022-07-22 16:15:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 16:15:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-22 16:15:28,122 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) [2022-07-22 16:15:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-07-22 16:15:28,126 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2022-07-22 16:15:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:15:28,127 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-07-22 16:15:28,127 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) [2022-07-22 16:15:28,128 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-07-22 16:15:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 16:15:28,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:28,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:15:28,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 16:15:28,130 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:28,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:28,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2022-07-22 16:15:28,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:28,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358655773] [2022-07-22 16:15:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:28,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:28,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:15:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:28,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:15:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:28,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:15:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:15:28,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:15:28,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358655773] [2022-07-22 16:15:28,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358655773] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:15:28,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:15:28,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:15:28,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821995137] [2022-07-22 16:15:28,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:15:28,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:15:28,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:15:28,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:15:28,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:15:28,276 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) [2022-07-22 16:15:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:15:28,347 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-07-22 16:15:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:15:28,348 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 [2022-07-22 16:15:28,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:15:28,351 INFO L225 Difference]: With dead ends: 42 [2022-07-22 16:15:28,353 INFO L226 Difference]: Without dead ends: 40 [2022-07-22 16:15:28,356 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 [2022-07-22 16:15:28,357 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 [2022-07-22 16:15:28,357 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] [2022-07-22 16:15:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-22 16:15:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-07-22 16:15:28,363 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) [2022-07-22 16:15:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-07-22 16:15:28,364 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2022-07-22 16:15:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:15:28,365 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-07-22 16:15:28,365 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) [2022-07-22 16:15:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-07-22 16:15:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 16:15:28,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:28,368 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] [2022-07-22 16:15:28,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 16:15:28,368 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:28,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:28,369 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2022-07-22 16:15:28,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:28,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543496730] [2022-07-22 16:15:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:28,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:28,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:15:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:28,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:15:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:28,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:15:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:28,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 16:15:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:15:28,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:15:28,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543496730] [2022-07-22 16:15:28,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543496730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:15:28,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:15:28,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:15:28,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201715635] [2022-07-22 16:15:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:15:28,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:15:28,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:15:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:15:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:15:28,505 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) [2022-07-22 16:15:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:15:28,584 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2022-07-22 16:15:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:15:28,584 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 [2022-07-22 16:15:28,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:15:28,587 INFO L225 Difference]: With dead ends: 46 [2022-07-22 16:15:28,588 INFO L226 Difference]: Without dead ends: 44 [2022-07-22 16:15:28,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:15:28,592 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:15:28,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:15:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-22 16:15:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-07-22 16:15:28,599 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) [2022-07-22 16:15:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-07-22 16:15:28,600 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2022-07-22 16:15:28,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:15:28,600 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-07-22 16:15:28,600 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) [2022-07-22 16:15:28,600 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-07-22 16:15:28,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 16:15:28,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:28,601 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] [2022-07-22 16:15:28,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 16:15:28,602 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2022-07-22 16:15:28,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:28,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832594298] [2022-07-22 16:15:28,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:28,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:28,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:15:28,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826431404] [2022-07-22 16:15:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:28,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:28,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:15:28,627 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) [2022-07-22 16:15:28,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 16:15:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:28,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 16:15:28,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:15:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 16:15:28,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:15:28,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:15:28,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832594298] [2022-07-22 16:15:28,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:15:28,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826431404] [2022-07-22 16:15:28,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826431404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:15:28,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:15:28,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:15:28,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378973077] [2022-07-22 16:15:28,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:15:28,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:15:28,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:15:28,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:15:28,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:15:28,871 INFO L87 Difference]: Start difference. First operand 37 states and 45 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 16:15:28,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:15:28,995 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-07-22 16:15:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:15:28,997 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-07-22 16:15:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:15:28,998 INFO L225 Difference]: With dead ends: 65 [2022-07-22 16:15:28,998 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 16:15:28,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:15:28,999 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:15:28,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 129 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:15:29,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 16:15:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-22 16:15:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 16:15:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-07-22 16:15:29,014 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 34 [2022-07-22 16:15:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:15:29,015 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-07-22 16:15:29,015 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 16:15:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-07-22 16:15:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 16:15:29,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:29,016 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] [2022-07-22 16:15:29,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 16:15:29,237 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 [2022-07-22 16:15:29,237 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:29,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:29,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2022-07-22 16:15:29,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:29,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579955974] [2022-07-22 16:15:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:29,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:29,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:15:29,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485359016] [2022-07-22 16:15:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:29,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:29,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:15:29,252 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) [2022-07-22 16:15:29,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 16:15:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:29,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 16:15:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:15:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 16:15:29,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:15:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 16:15:29,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:15:29,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579955974] [2022-07-22 16:15:29,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:15:29,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485359016] [2022-07-22 16:15:29,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485359016] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 16:15:29,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:15:29,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-07-22 16:15:29,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496629895] [2022-07-22 16:15:29,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:15:29,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 16:15:29,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:15:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 16:15:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:15:29,802 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 16:15:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:15:29,957 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2022-07-22 16:15:29,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:15:29,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-07-22 16:15:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:15:29,959 INFO L225 Difference]: With dead ends: 64 [2022-07-22 16:15:29,959 INFO L226 Difference]: Without dead ends: 62 [2022-07-22 16:15:29,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:15:29,960 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:15:29,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 131 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:15:29,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-22 16:15:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-07-22 16:15:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-22 16:15:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-07-22 16:15:29,969 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 41 [2022-07-22 16:15:29,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:15:29,970 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-07-22 16:15:29,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 16:15:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-07-22 16:15:29,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 16:15:29,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:29,975 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:15:30,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 16:15:30,201 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 [2022-07-22 16:15:30,201 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash 105343995, now seen corresponding path program 1 times [2022-07-22 16:15:30,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:30,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230415032] [2022-07-22 16:15:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:30,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:30,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:15:30,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327562581] [2022-07-22 16:15:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:30,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:30,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:15:30,236 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) [2022-07-22 16:15:30,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 16:15:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:30,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 16:15:30,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:15:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-22 16:15:30,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:15:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-22 16:15:30,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:15:30,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230415032] [2022-07-22 16:15:30,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:15:30,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327562581] [2022-07-22 16:15:30,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327562581] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 16:15:30,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:15:30,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 16:15:30,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975240267] [2022-07-22 16:15:30,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:15:30,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:15:30,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:15:30,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:15:30,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 16:15:30,580 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 16:15:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:15:30,735 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2022-07-22 16:15:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:15:30,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-07-22 16:15:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:15:30,737 INFO L225 Difference]: With dead ends: 72 [2022-07-22 16:15:30,737 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 16:15:30,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:15:30,739 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:15:30,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 113 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:15:30,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 16:15:30,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-07-22 16:15:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 16:15:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2022-07-22 16:15:30,749 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 51 [2022-07-22 16:15:30,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:15:30,749 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2022-07-22 16:15:30,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 16:15:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2022-07-22 16:15:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 16:15:30,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:30,751 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1, 1, 1, 1] [2022-07-22 16:15:30,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 16:15:30,967 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 [2022-07-22 16:15:30,968 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:30,968 INFO L85 PathProgramCache]: Analyzing trace with hash 957489548, now seen corresponding path program 1 times [2022-07-22 16:15:30,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:30,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836163186] [2022-07-22 16:15:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:30,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:30,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:15:30,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594072671] [2022-07-22 16:15:30,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:30,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:30,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:15:30,979 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) [2022-07-22 16:15:30,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 16:15:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:31,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 16:15:31,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:15:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-22 16:15:31,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:15:31,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:15:31,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836163186] [2022-07-22 16:15:31,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:15:31,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594072671] [2022-07-22 16:15:31,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594072671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:15:31,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:15:31,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:15:31,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531290765] [2022-07-22 16:15:31,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:15:31,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:15:31,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:15:31,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:15:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:15:31,087 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 16:15:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:15:31,139 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2022-07-22 16:15:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:15:31,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-07-22 16:15:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:15:31,142 INFO L225 Difference]: With dead ends: 75 [2022-07-22 16:15:31,142 INFO L226 Difference]: Without dead ends: 68 [2022-07-22 16:15:31,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:15:31,143 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:15:31,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 107 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:15:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-22 16:15:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-07-22 16:15:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-22 16:15:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-07-22 16:15:31,152 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 52 [2022-07-22 16:15:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:15:31,152 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-07-22 16:15:31,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 16:15:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-07-22 16:15:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 16:15:31,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:31,154 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] [2022-07-22 16:15:31,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 16:15:31,378 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 [2022-07-22 16:15:31,378 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:31,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:31,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2022-07-22 16:15:31,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:31,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637363673] [2022-07-22 16:15:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:31,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:31,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:15:31,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195957814] [2022-07-22 16:15:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:31,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:31,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:15:31,404 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) [2022-07-22 16:15:31,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 16:15:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 16:15:31,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:15:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-22 16:15:32,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:15:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-22 16:15:39,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:15:39,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637363673] [2022-07-22 16:15:39,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:15:39,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195957814] [2022-07-22 16:15:39,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195957814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:15:39,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:15:39,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-07-22 16:15:39,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132340403] [2022-07-22 16:15:39,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:15:39,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 16:15:39,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:15:39,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 16:15:39,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-22 16:15:39,015 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-07-22 16:15:51,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:15:51,130 INFO L93 Difference]: Finished difference Result 165 states and 227 transitions. [2022-07-22 16:15:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 16:15:51,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 71 [2022-07-22 16:15:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:15:51,133 INFO L225 Difference]: With dead ends: 165 [2022-07-22 16:15:51,133 INFO L226 Difference]: Without dead ends: 138 [2022-07-22 16:15:51,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-07-22 16:15:51,134 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 61 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:15:51,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 214 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-07-22 16:15:51,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-22 16:15:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 102. [2022-07-22 16:15:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-22 16:15:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 129 transitions. [2022-07-22 16:15:51,174 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 129 transitions. Word has length 71 [2022-07-22 16:15:51,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:15:51,174 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 129 transitions. [2022-07-22 16:15:51,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-07-22 16:15:51,175 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 129 transitions. [2022-07-22 16:15:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 16:15:51,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:51,176 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 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] [2022-07-22 16:15:51,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 16:15:51,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:51,378 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:51,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2022-07-22 16:15:51,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:51,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684367581] [2022-07-22 16:15:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:51,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:51,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:15:51,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407123648] [2022-07-22 16:15:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:51,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:51,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:15:51,415 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:15:51,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 16:15:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:51,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 16:15:51,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:15:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-07-22 16:15:51,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:15:53,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:15:53,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684367581] [2022-07-22 16:15:53,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:15:53,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407123648] [2022-07-22 16:15:53,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407123648] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:15:53,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:15:53,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-22 16:15:53,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002259242] [2022-07-22 16:15:53,673 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:15:53,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 16:15:53,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:15:53,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 16:15:53,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-07-22 16:15:53,674 INFO L87 Difference]: Start difference. First operand 102 states and 129 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-07-22 16:15:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:15:54,952 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2022-07-22 16:15:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:15:54,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-07-22 16:15:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:15:54,954 INFO L225 Difference]: With dead ends: 136 [2022-07-22 16:15:54,955 INFO L226 Difference]: Without dead ends: 102 [2022-07-22 16:15:54,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-07-22 16:15:54,956 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:15:54,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 211 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 16:15:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-22 16:15:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2022-07-22 16:15:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-22 16:15:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-07-22 16:15:54,985 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 82 [2022-07-22 16:15:54,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:15:54,985 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-07-22 16:15:54,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-07-22 16:15:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-07-22 16:15:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 16:15:54,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:54,995 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:15:55,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 16:15:55,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:55,196 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:55,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1888027627, now seen corresponding path program 2 times [2022-07-22 16:15:55,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:55,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608729636] [2022-07-22 16:15:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:55,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:55,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:15:55,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454718027] [2022-07-22 16:15:55,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:15:55,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:55,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:15:55,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:15:55,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 16:15:55,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:15:55,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:15:55,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 16:15:55,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:15:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-22 16:15:55,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:15:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-22 16:15:55,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:15:55,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608729636] [2022-07-22 16:15:55,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:15:55,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454718027] [2022-07-22 16:15:55,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454718027] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:15:55,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:15:55,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-07-22 16:15:55,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144808600] [2022-07-22 16:15:55,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:15:55,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:15:55,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:15:55,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:15:55,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:15:55,561 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-07-22 16:15:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:15:55,641 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-07-22 16:15:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 16:15:55,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 84 [2022-07-22 16:15:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:15:55,644 INFO L225 Difference]: With dead ends: 121 [2022-07-22 16:15:55,644 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 16:15:55,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:15:55,645 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:15:55,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 153 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:15:55,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 16:15:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-22 16:15:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-22 16:15:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2022-07-22 16:15:55,659 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 84 [2022-07-22 16:15:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:15:55,660 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2022-07-22 16:15:55,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-07-22 16:15:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2022-07-22 16:15:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 16:15:55,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:55,667 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 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, 1] [2022-07-22 16:15:55,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 16:15:55,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:55,868 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:55,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:55,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1729716470, now seen corresponding path program 1 times [2022-07-22 16:15:55,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:55,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335402213] [2022-07-22 16:15:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:55,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:55,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:15:55,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571940671] [2022-07-22 16:15:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:55,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:55,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:15:55,906 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:15:55,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 16:15:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:55,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:15:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:15:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-07-22 16:15:56,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:15:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-07-22 16:15:56,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:15:56,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335402213] [2022-07-22 16:15:56,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:15:56,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571940671] [2022-07-22 16:15:56,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571940671] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:15:56,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:15:56,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-22 16:15:56,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150254136] [2022-07-22 16:15:56,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:15:56,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 16:15:56,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:15:56,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 16:15:56,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:15:56,432 INFO L87 Difference]: Start difference. First operand 99 states and 122 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-07-22 16:15:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:15:56,839 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2022-07-22 16:15:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 16:15:56,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 87 [2022-07-22 16:15:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:15:56,852 INFO L225 Difference]: With dead ends: 107 [2022-07-22 16:15:56,852 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 16:15:56,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-22 16:15:56,853 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 10 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:15:56,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 268 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 16:15:56,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 16:15:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-22 16:15:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-22 16:15:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2022-07-22 16:15:56,864 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 87 [2022-07-22 16:15:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:15:56,864 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2022-07-22 16:15:56,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-07-22 16:15:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2022-07-22 16:15:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 16:15:56,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:56,865 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:15:56,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 16:15:57,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 16:15:57,076 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:57,086 INFO L85 PathProgramCache]: Analyzing trace with hash -219918921, now seen corresponding path program 1 times [2022-07-22 16:15:57,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:57,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002990397] [2022-07-22 16:15:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:57,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:57,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:15:57,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877329468] [2022-07-22 16:15:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:57,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:57,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:15:57,116 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:15:57,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 16:15:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:15:57,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 16:15:57,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:15:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-07-22 16:15:57,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:15:57,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:15:57,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002990397] [2022-07-22 16:15:57,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:15:57,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877329468] [2022-07-22 16:15:57,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877329468] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:15:57,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:15:57,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:15:57,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101855923] [2022-07-22 16:15:57,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:15:57,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:15:57,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:15:57,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:15:57,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:15:57,259 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-22 16:15:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:15:57,313 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2022-07-22 16:15:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:15:57,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2022-07-22 16:15:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:15:57,315 INFO L225 Difference]: With dead ends: 97 [2022-07-22 16:15:57,315 INFO L226 Difference]: Without dead ends: 85 [2022-07-22 16:15:57,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:15:57,316 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 12 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:15:57,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 110 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:15:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-22 16:15:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-22 16:15:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-22 16:15:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2022-07-22 16:15:57,333 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 91 [2022-07-22 16:15:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:15:57,333 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2022-07-22 16:15:57,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-22 16:15:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2022-07-22 16:15:57,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-22 16:15:57,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:15:57,334 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:15:57,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 16:15:57,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:57,536 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:15:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:15:57,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2103086134, now seen corresponding path program 3 times [2022-07-22 16:15:57,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:15:57,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346091381] [2022-07-22 16:15:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:15:57,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:15:57,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:15:57,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87899290] [2022-07-22 16:15:57,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:15:57,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:15:57,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:15:57,560 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:15:57,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 16:15:57,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 16:15:57,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:15:57,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 16:15:57,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:15:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-22 16:15:58,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:16:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-07-22 16:16:46,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:46,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346091381] [2022-07-22 16:16:46,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:16:46,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87899290] [2022-07-22 16:16:46,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87899290] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:16:46,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:16:46,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-07-22 16:16:46,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847233905] [2022-07-22 16:16:46,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:16:46,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 16:16:46,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:46,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 16:16:46,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-22 16:16:46,990 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 12 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-07-22 16:17:22,479 WARN L233 SmtUtils]: Spent 30.37s on a formula simplification. DAG size of input: 180 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:17:46,986 WARN L233 SmtUtils]: Spent 19.14s on a formula simplification. DAG size of input: 143 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:18:00,743 WARN L233 SmtUtils]: Spent 10.26s on a formula simplification. DAG size of input: 81 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:18:14,369 WARN L233 SmtUtils]: Spent 9.42s on a formula simplification. DAG size of input: 67 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:18:18,737 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:18:43,314 WARN L233 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 87 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:19:17,737 WARN L233 SmtUtils]: Spent 32.61s on a formula simplification. DAG size of input: 187 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:19:41,960 WARN L233 SmtUtils]: Spent 14.43s on a formula simplification. DAG size of input: 136 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:19:46,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:19:46,633 INFO L93 Difference]: Finished difference Result 178 states and 239 transitions. [2022-07-22 16:19:46,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 16:19:46,648 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 12 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 101 [2022-07-22 16:19:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:19:46,649 INFO L225 Difference]: With dead ends: 178 [2022-07-22 16:19:46,649 INFO L226 Difference]: Without dead ends: 150 [2022-07-22 16:19:46,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 175 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 155.1s TimeCoverageRelationStatistics Valid=282, Invalid=1200, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 16:19:46,651 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 102 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 244 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:19:46,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 244 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1318 Invalid, 1 Unknown, 0 Unchecked, 35.1s Time] [2022-07-22 16:19:46,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-22 16:19:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 133. [2022-07-22 16:19:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 80 states have (on average 1.15) internal successors, (92), 85 states have internal predecessors, (92), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-22 16:19:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 169 transitions. [2022-07-22 16:19:46,696 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 169 transitions. Word has length 101 [2022-07-22 16:19:46,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:19:46,699 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 169 transitions. [2022-07-22 16:19:46,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 12 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-07-22 16:19:46,699 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 169 transitions. [2022-07-22 16:19:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 16:19:46,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:19:46,703 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:19:46,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 16:19:46,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 16:19:46,924 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:19:46,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:19:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1168936300, now seen corresponding path program 2 times [2022-07-22 16:19:46,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:19:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991386754] [2022-07-22 16:19:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:19:46,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:19:46,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:19:46,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256748903] [2022-07-22 16:19:46,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:19:46,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:19:46,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:19:46,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:19:46,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 16:19:47,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:19:47,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:19:47,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 16:19:47,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:19:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 67 proven. 69 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-07-22 16:19:49,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:19:53,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:19:53,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991386754] [2022-07-22 16:19:53,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:19:53,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256748903] [2022-07-22 16:19:53,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256748903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:19:53,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:19:53,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-22 16:19:53,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144419091] [2022-07-22 16:19:53,958 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:19:53,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 16:19:53,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:19:53,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 16:19:53,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-07-22 16:19:53,959 INFO L87 Difference]: Start difference. First operand 133 states and 169 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-22 16:19:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:19:58,868 INFO L93 Difference]: Finished difference Result 141 states and 177 transitions. [2022-07-22 16:19:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 16:19:58,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 112 [2022-07-22 16:19:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:19:58,871 INFO L225 Difference]: With dead ends: 141 [2022-07-22 16:19:58,871 INFO L226 Difference]: Without dead ends: 133 [2022-07-22 16:19:58,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-07-22 16:19:58,872 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-22 16:19:58,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 245 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-22 16:19:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-22 16:19:58,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-07-22 16:19:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 80 states have (on average 1.1375) internal successors, (91), 85 states have internal predecessors, (91), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-22 16:19:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2022-07-22 16:19:58,894 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 112 [2022-07-22 16:19:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:19:58,895 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2022-07-22 16:19:58,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-22 16:19:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2022-07-22 16:19:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-22 16:19:58,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:19:58,897 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:19:58,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 16:19:59,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 16:19:59,119 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:19:59,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:19:59,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1560875064, now seen corresponding path program 4 times [2022-07-22 16:19:59,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:19:59,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924790561] [2022-07-22 16:19:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:19:59,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:19:59,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:19:59,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723439650] [2022-07-22 16:19:59,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:19:59,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:19:59,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:19:59,147 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:19:59,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 16:19:59,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:19:59,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:19:59,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:19:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:19:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-22 16:19:59,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:19:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-22 16:19:59,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:19:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924790561] [2022-07-22 16:19:59,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:19:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723439650] [2022-07-22 16:19:59,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723439650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:19:59,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:19:59,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-07-22 16:19:59,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380924217] [2022-07-22 16:19:59,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:19:59,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 16:19:59,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:19:59,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 16:19:59,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:19:59,479 INFO L87 Difference]: Start difference. First operand 133 states and 168 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2022-07-22 16:19:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:19:59,575 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2022-07-22 16:19:59,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:19:59,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) Word has length 114 [2022-07-22 16:19:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:19:59,577 INFO L225 Difference]: With dead ends: 155 [2022-07-22 16:19:59,577 INFO L226 Difference]: Without dead ends: 111 [2022-07-22 16:19:59,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:19:59,577 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:19:59,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 257 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:19:59,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-22 16:19:59,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-07-22 16:19:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 71 states have internal predecessors, (74), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-22 16:19:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2022-07-22 16:19:59,595 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 114 [2022-07-22 16:19:59,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:19:59,596 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2022-07-22 16:19:59,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2022-07-22 16:19:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2022-07-22 16:19:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-22 16:19:59,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:19:59,598 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:19:59,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 16:19:59,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 16:19:59,819 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:19:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:19:59,820 INFO L85 PathProgramCache]: Analyzing trace with hash 546247585, now seen corresponding path program 3 times [2022-07-22 16:19:59,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:19:59,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162644333] [2022-07-22 16:19:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:19:59,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:19:59,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:19:59,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895779691] [2022-07-22 16:19:59,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:19:59,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:19:59,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:19:59,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:19:59,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 16:19:59,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 16:19:59,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:19:59,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 16:19:59,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:20:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2022-07-22 16:20:01,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:20:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2022-07-22 16:20:01,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:20:01,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162644333] [2022-07-22 16:20:01,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:20:01,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895779691] [2022-07-22 16:20:01,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895779691] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:20:01,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:20:01,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-22 16:20:01,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316406067] [2022-07-22 16:20:01,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:20:01,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 16:20:01,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:20:01,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 16:20:01,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:20:01,757 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11)