./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.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/egcd2-ll_unwindbound20.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 9e9911e775b3214ba13077b05d83e9364947724e9afa3bb89f51b07ee325bd90 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:58:53,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:58:53,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:58:53,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:58:53,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:58:53,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:58:53,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:58:53,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:58:53,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:58:53,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:58:53,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:58:53,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:58:53,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:58:53,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:58:53,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:58:53,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:58:53,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:58:53,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:58:53,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:58:53,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:58:53,509 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:58:53,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:58:53,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:58:53,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:58:53,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:58:53,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:58:53,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:58:53,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:58:53,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:58:53,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:58:53,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:58:53,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:58:53,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:58:53,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:58:53,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:58:53,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:58:53,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:58:53,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:58:53,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:58:53,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:58:53,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:58:53,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:58:53,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:58:53,546 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:58:53,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:58:53,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:58:53,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:58:53,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:58:53,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:58:53,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:58:53,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:58:53,548 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:58:53,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:58:53,549 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:58:53,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:58:53,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:58:53,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:58:53,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:58:53,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:58:53,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:58:53,550 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:58:53,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:58:53,551 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:58:53,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:58:53,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:58:53,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:58:53,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:58:53,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:58:53,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:58:53,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:58:53,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:58:53,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:58:53,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:58:53,553 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:58:53,554 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:58:53,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:58:53,554 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e9911e775b3214ba13077b05d83e9364947724e9afa3bb89f51b07ee325bd90 [2022-07-22 15:58:53,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:58:53,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:58:53,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:58:53,736 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:58:53,737 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:58:53,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2022-07-22 15:58:53,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be9e0cc2f/4d0fb76f0f1a4ba6b3dcbaacbf1e230b/FLAGfd668f66d [2022-07-22 15:58:54,142 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:58:54,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2022-07-22 15:58:54,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be9e0cc2f/4d0fb76f0f1a4ba6b3dcbaacbf1e230b/FLAGfd668f66d [2022-07-22 15:58:54,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be9e0cc2f/4d0fb76f0f1a4ba6b3dcbaacbf1e230b [2022-07-22 15:58:54,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:58:54,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:58:54,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:58:54,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:58:54,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:58:54,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:58:54" (1/1) ... [2022-07-22 15:58:54,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2097010d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54, skipping insertion in model container [2022-07-22 15:58:54,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:58:54" (1/1) ... [2022-07-22 15:58:54,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:58:54,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:58:54,298 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/egcd2-ll_unwindbound20.c[490,503] [2022-07-22 15:58:54,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:58:54,331 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:58:54,341 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/egcd2-ll_unwindbound20.c[490,503] [2022-07-22 15:58:54,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:58:54,367 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:58:54,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54 WrapperNode [2022-07-22 15:58:54,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:58:54,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:58:54,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:58:54,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:58:54,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54" (1/1) ... [2022-07-22 15:58:54,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54" (1/1) ... [2022-07-22 15:58:54,396 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2022-07-22 15:58:54,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:58:54,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:58:54,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:58:54,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:58:54,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54" (1/1) ... [2022-07-22 15:58:54,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54" (1/1) ... [2022-07-22 15:58:54,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54" (1/1) ... [2022-07-22 15:58:54,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54" (1/1) ... [2022-07-22 15:58:54,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54" (1/1) ... [2022-07-22 15:58:54,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54" (1/1) ... [2022-07-22 15:58:54,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54" (1/1) ... [2022-07-22 15:58:54,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:58:54,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:58:54,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:58:54,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:58:54,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54" (1/1) ... [2022-07-22 15:58:54,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:58:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:54,443 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 15:58:54,449 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 15:58:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:58:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 15:58:54,467 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 15:58:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:58:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:58:54,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:58:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 15:58:54,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 15:58:54,511 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:58:54,512 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:58:54,598 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:58:54,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:58:54,602 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 15:58:54,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:58:54 BoogieIcfgContainer [2022-07-22 15:58:54,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:58:54,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:58:54,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:58:54,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:58:54,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:58:54" (1/3) ... [2022-07-22 15:58:54,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b1484ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:58:54, skipping insertion in model container [2022-07-22 15:58:54,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:58:54" (2/3) ... [2022-07-22 15:58:54,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b1484ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:58:54, skipping insertion in model container [2022-07-22 15:58:54,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:58:54" (3/3) ... [2022-07-22 15:58:54,609 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2022-07-22 15:58:54,618 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:58:54,619 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:58:54,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:58:54,667 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@731e80b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78d933bf [2022-07-22 15:58:54,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:58:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 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 15:58:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 15:58:54,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:54,676 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:54,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:54,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:54,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2022-07-22 15:58:54,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:54,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616645364] [2022-07-22 15:58:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:54,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:54,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 15:58:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:54,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 15:58:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:54,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 15:58:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:54,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 15:58:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:58:54,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:54,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616645364] [2022-07-22 15:58:54,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616645364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:58:54,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:58:54,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 15:58:54,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084362123] [2022-07-22 15:58:54,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:58:54,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 15:58:54,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:54,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 15:58:54,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:58:54,888 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:58:54,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:54,915 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2022-07-22 15:58:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 15:58:54,917 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-07-22 15:58:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:54,922 INFO L225 Difference]: With dead ends: 65 [2022-07-22 15:58:54,922 INFO L226 Difference]: Without dead ends: 30 [2022-07-22 15:58:54,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 15:58:54,928 INFO L413 NwaCegarLoop]: 45 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, 45 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 15:58:54,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:58:54,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-22 15:58:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-22 15:58:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 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 15:58:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-07-22 15:58:54,970 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2022-07-22 15:58:54,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:54,971 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-07-22 15:58:54,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:58:54,972 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-07-22 15:58:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 15:58:54,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:54,974 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:54,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:58:54,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:54,976 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2022-07-22 15:58:54,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:54,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956885833] [2022-07-22 15:58:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:54,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:55,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:55,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752256916] [2022-07-22 15:58:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:55,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:55,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:55,032 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 15:58:55,033 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 15:58:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:55,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 15:58:55,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:58:55,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:58:55,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:55,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956885833] [2022-07-22 15:58:55,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:55,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752256916] [2022-07-22 15:58:55,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752256916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:58:55,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:58:55,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 15:58:55,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234608233] [2022-07-22 15:58:55,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:58:55,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 15:58:55,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 15:58:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 15:58:55,193 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:58:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:55,215 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-07-22 15:58:55,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 15:58:55,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-07-22 15:58:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:55,218 INFO L225 Difference]: With dead ends: 40 [2022-07-22 15:58:55,218 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 15:58:55,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 15:58:55,228 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:55,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:58:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 15:58:55,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-22 15:58:55,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 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 15:58:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-07-22 15:58:55,233 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2022-07-22 15:58:55,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:55,234 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-07-22 15:58:55,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:58:55,234 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-07-22 15:58:55,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 15:58:55,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:55,234 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:55,262 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 15:58:55,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:55,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:55,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:55,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2022-07-22 15:58:55,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:55,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106020088] [2022-07-22 15:58:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:55,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:55,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:55,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724012472] [2022-07-22 15:58:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:55,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:55,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:55,466 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 15:58:55,468 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 15:58:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:55,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:58:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:58:55,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:58:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:55,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106020088] [2022-07-22 15:58:55,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:55,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724012472] [2022-07-22 15:58:55,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724012472] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:58:55,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:58:55,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-22 15:58:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851331803] [2022-07-22 15:58:55,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:58:55,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 15:58:55,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:55,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 15:58:55,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:58:55,608 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:58:55,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:55,698 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-07-22 15:58:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:58:55,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-07-22 15:58:55,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:55,700 INFO L225 Difference]: With dead ends: 49 [2022-07-22 15:58:55,700 INFO L226 Difference]: Without dead ends: 41 [2022-07-22 15:58:55,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:58:55,704 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:55,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 92 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:58:55,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-22 15:58:55,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-07-22 15:58:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 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 15:58:55,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-07-22 15:58:55,711 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 30 [2022-07-22 15:58:55,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:55,711 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-07-22 15:58:55,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:58:55,711 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-07-22 15:58:55,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 15:58:55,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:55,712 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:55,728 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 15:58:55,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 15:58:55,921 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:55,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:55,922 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2022-07-22 15:58:55,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:55,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739126479] [2022-07-22 15:58:55,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:55,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:55,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:55,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347360303] [2022-07-22 15:58:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:55,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:55,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:55,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:58:55,940 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 15:58:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:55,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 15:58:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:58:56,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:58:56,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:56,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739126479] [2022-07-22 15:58:56,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:56,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347360303] [2022-07-22 15:58:56,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347360303] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 15:58:56,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:58:56,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 15:58:56,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910177232] [2022-07-22 15:58:56,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:58:56,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:58:56,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:56,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:58:56,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:58:56,136 INFO L87 Difference]: Start difference. First operand 33 states and 44 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), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:58:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:56,183 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-07-22 15:58:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:58:56,196 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), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2022-07-22 15:58:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:56,197 INFO L225 Difference]: With dead ends: 39 [2022-07-22 15:58:56,197 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 15:58:56,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:58:56,198 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 115 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 15:58:56,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:58:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 15:58:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-22 15:58:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 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 15:58:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-07-22 15:58:56,202 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 32 [2022-07-22 15:58:56,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:56,203 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-07-22 15:58:56,203 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), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:58:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-07-22 15:58:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 15:58:56,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:56,204 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:56,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 15:58:56,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:56,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:56,415 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2022-07-22 15:58:56,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:56,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844941100] [2022-07-22 15:58:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:56,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:56,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:56,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60517332] [2022-07-22 15:58:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:56,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:56,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:56,431 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 15:58:56,432 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 15:58:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:56,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 15:58:56,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:58:56,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:58:56,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:56,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844941100] [2022-07-22 15:58:56,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:56,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60517332] [2022-07-22 15:58:56,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60517332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:58:56,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:58:56,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 15:58:56,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870333524] [2022-07-22 15:58:56,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:58:56,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:58:56,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:56,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:58:56,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:58:56,510 INFO L87 Difference]: Start difference. First operand 37 states and 47 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:58:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:56,529 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-07-22 15:58:56,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:58:56,530 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-07-22 15:58:56,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:56,541 INFO L225 Difference]: With dead ends: 62 [2022-07-22 15:58:56,541 INFO L226 Difference]: Without dead ends: 39 [2022-07-22 15:58:56,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:58:56,542 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:56,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 122 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:58:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-22 15:58:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-22 15:58:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 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 15:58:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-07-22 15:58:56,551 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 35 [2022-07-22 15:58:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:56,551 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-07-22 15:58:56,552 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:58:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-07-22 15:58:56,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 15:58:56,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:56,552 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:56,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 15:58:56,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:56,759 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:56,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:56,760 INFO L85 PathProgramCache]: Analyzing trace with hash 433790877, now seen corresponding path program 1 times [2022-07-22 15:58:56,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:56,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375001885] [2022-07-22 15:58:56,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:56,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:56,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:56,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912066783] [2022-07-22 15:58:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:56,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:56,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:56,770 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 15:58:56,771 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 15:58:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:56,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:58:56,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:58:56,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:58:56,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:56,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375001885] [2022-07-22 15:58:56,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:56,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912066783] [2022-07-22 15:58:56,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912066783] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 15:58:56,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:58:56,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 15:58:56,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258551011] [2022-07-22 15:58:56,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:58:56,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:58:56,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:58:56,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:58:56,976 INFO L87 Difference]: Start difference. First operand 39 states and 49 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, (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 15:58:57,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:57,017 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2022-07-22 15:58:57,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:58:57,018 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, (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 37 [2022-07-22 15:58:57,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:57,018 INFO L225 Difference]: With dead ends: 53 [2022-07-22 15:58:57,018 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 15:58:57,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:58:57,019 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:57,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:58:57,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 15:58:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-07-22 15:58:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 15:58:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2022-07-22 15:58:57,037 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 37 [2022-07-22 15:58:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:57,037 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2022-07-22 15:58:57,037 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, (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 15:58:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2022-07-22 15:58:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 15:58:57,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:57,038 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 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 15:58:57,066 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 15:58:57,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:57,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:57,239 INFO L85 PathProgramCache]: Analyzing trace with hash -553232285, now seen corresponding path program 1 times [2022-07-22 15:58:57,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:57,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453627233] [2022-07-22 15:58:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:57,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:57,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:57,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953191530] [2022-07-22 15:58:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:57,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:57,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:57,249 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 15:58:57,250 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 15:58:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:57,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:58:57,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 15:58:57,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 15:58:57,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:57,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453627233] [2022-07-22 15:58:57,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:57,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953191530] [2022-07-22 15:58:57,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953191530] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 15:58:57,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:58:57,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 15:58:57,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131104761] [2022-07-22 15:58:57,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:58:57,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:58:57,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:57,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:58:57,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:58:57,452 INFO L87 Difference]: Start difference. First operand 50 states and 65 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, (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 15:58:57,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:57,487 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-07-22 15:58:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:58:57,488 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, (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 42 [2022-07-22 15:58:57,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:57,488 INFO L225 Difference]: With dead ends: 57 [2022-07-22 15:58:57,488 INFO L226 Difference]: Without dead ends: 55 [2022-07-22 15:58:57,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:58:57,489 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:57,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:58:57,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-22 15:58:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-07-22 15:58:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 15:58:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-07-22 15:58:57,495 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 42 [2022-07-22 15:58:57,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:57,495 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-07-22 15:58:57,495 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, (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 15:58:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-07-22 15:58:57,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 15:58:57,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:57,496 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-07-22 15:58:57,514 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 15:58:57,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:57,711 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:57,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2022-07-22 15:58:57,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:57,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882303233] [2022-07-22 15:58:57,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:57,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:57,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:57,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821192053] [2022-07-22 15:58:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:57,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:57,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:57,719 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 15:58:57,720 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 15:58:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:57,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 15:58:57,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 15:58:57,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:57,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:57,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882303233] [2022-07-22 15:58:57,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:57,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821192053] [2022-07-22 15:58:57,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821192053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:58:57,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:58:57,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-22 15:58:57,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831297118] [2022-07-22 15:58:57,974 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 15:58:57,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 15:58:57,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 15:58:57,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:58:57,975 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 15:58:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:58,062 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-07-22 15:58:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 15:58:58,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-07-22 15:58:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:58,064 INFO L225 Difference]: With dead ends: 61 [2022-07-22 15:58:58,064 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 15:58:58,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:58:58,064 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:58,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 136 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:58:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 15:58:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-07-22 15:58:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 15:58:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-07-22 15:58:58,070 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 47 [2022-07-22 15:58:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:58,070 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-07-22 15:58:58,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 15:58:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-07-22 15:58:58,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 15:58:58,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:58,070 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:58:58,088 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 15:58:58,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:58,288 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:58,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2022-07-22 15:58:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:58,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153297087] [2022-07-22 15:58:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:58,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:58,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:58,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725289737] [2022-07-22 15:58:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:58,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:58,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:58,299 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 15:58:58,300 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 15:58:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:58,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:58:58,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 15:58:58,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 15:58:58,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:58,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153297087] [2022-07-22 15:58:58,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:58,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725289737] [2022-07-22 15:58:58,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725289737] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:58:58,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:58:58,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-22 15:58:58,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556976671] [2022-07-22 15:58:58,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:58:58,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 15:58:58,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:58,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 15:58:58,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:58:58,436 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 15:58:58,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:58,556 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2022-07-22 15:58:58,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 15:58:58,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2022-07-22 15:58:58,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:58,558 INFO L225 Difference]: With dead ends: 211 [2022-07-22 15:58:58,558 INFO L226 Difference]: Without dead ends: 203 [2022-07-22 15:58:58,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:58:58,559 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 97 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:58,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 264 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:58:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-22 15:58:58,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2022-07-22 15:58:58,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-07-22 15:58:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2022-07-22 15:58:58,581 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2022-07-22 15:58:58,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:58,581 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2022-07-22 15:58:58,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 15:58:58,582 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2022-07-22 15:58:58,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 15:58:58,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:58,583 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 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, 1] [2022-07-22 15:58:58,599 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 15:58:58,799 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,SelfDestructingSolverStorable8 [2022-07-22 15:58:58,800 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:58,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2022-07-22 15:58:58,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:58,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705608640] [2022-07-22 15:58:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:58,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:58,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:58,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367941250] [2022-07-22 15:58:58,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:58,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:58,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:58,812 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 15:58:58,812 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 15:58:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:58,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 15:58:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 15:58:58,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 15:58:58,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:58,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705608640] [2022-07-22 15:58:58,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:58,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367941250] [2022-07-22 15:58:58,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367941250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:58:58,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:58:58,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-22 15:58:58,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049017466] [2022-07-22 15:58:58,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:58:58,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 15:58:58,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:58,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 15:58:58,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:58:58,960 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 15:58:59,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:59,145 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2022-07-22 15:58:59,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 15:58:59,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2022-07-22 15:58:59,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:59,146 INFO L225 Difference]: With dead ends: 279 [2022-07-22 15:58:59,146 INFO L226 Difference]: Without dead ends: 259 [2022-07-22 15:58:59,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-22 15:58:59,147 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 62 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:59,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 334 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:58:59,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-07-22 15:58:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2022-07-22 15:58:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-22 15:58:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2022-07-22 15:58:59,168 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2022-07-22 15:58:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:59,168 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2022-07-22 15:58:59,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 15:58:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2022-07-22 15:58:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 15:58:59,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:59,171 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 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, 1] [2022-07-22 15:58:59,190 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 15:58:59,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 15:58:59,388 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2022-07-22 15:58:59,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:59,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461354386] [2022-07-22 15:58:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:59,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:59,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:59,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848954401] [2022-07-22 15:58:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:59,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:59,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:59,396 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 15:58:59,400 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 15:58:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:59,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:58:59,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:58:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 15:58:59,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:58:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 15:58:59,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:58:59,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461354386] [2022-07-22 15:58:59,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:58:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848954401] [2022-07-22 15:58:59,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848954401] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:58:59,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:58:59,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-22 15:58:59,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831976969] [2022-07-22 15:58:59,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:58:59,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 15:58:59,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:58:59,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 15:58:59,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:58:59,562 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 15:58:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:58:59,685 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2022-07-22 15:58:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 15:58:59,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 59 [2022-07-22 15:58:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:58:59,686 INFO L225 Difference]: With dead ends: 344 [2022-07-22 15:58:59,686 INFO L226 Difference]: Without dead ends: 248 [2022-07-22 15:58:59,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:58:59,687 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 77 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:58:59,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 188 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:58:59,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-07-22 15:58:59,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2022-07-22 15:58:59,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-22 15:58:59,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2022-07-22 15:58:59,702 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2022-07-22 15:58:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:58:59,702 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2022-07-22 15:58:59,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 15:58:59,703 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2022-07-22 15:58:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 15:58:59,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:58:59,703 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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 15:58:59,737 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 15:58:59,927 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,SelfDestructingSolverStorable10 [2022-07-22 15:58:59,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:58:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:58:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2022-07-22 15:58:59,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:58:59,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317595115] [2022-07-22 15:58:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:59,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:58:59,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:58:59,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88292946] [2022-07-22 15:58:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:58:59,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:58:59,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:58:59,935 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 15:58:59,936 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 15:58:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:58:59,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 15:58:59,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-22 15:59:00,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-22 15:59:00,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:00,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317595115] [2022-07-22 15:59:00,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:00,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88292946] [2022-07-22 15:59:00,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88292946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:59:00,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:59:00,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-07-22 15:59:00,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640428412] [2022-07-22 15:59:00,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:00,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 15:59:00,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:00,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 15:59:00,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 15:59:00,173 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-22 15:59:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:00,428 INFO L93 Difference]: Finished difference Result 330 states and 429 transitions. [2022-07-22 15:59:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 15:59:00,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 64 [2022-07-22 15:59:00,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:00,431 INFO L225 Difference]: With dead ends: 330 [2022-07-22 15:59:00,431 INFO L226 Difference]: Without dead ends: 324 [2022-07-22 15:59:00,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-22 15:59:00,432 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 40 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:00,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 286 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:59:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-07-22 15:59:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2022-07-22 15:59:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 203 states have internal predecessors, (232), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-07-22 15:59:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2022-07-22 15:59:00,448 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 64 [2022-07-22 15:59:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:00,449 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2022-07-22 15:59:00,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-22 15:59:00,449 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2022-07-22 15:59:00,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 15:59:00,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:00,450 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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 15:59:00,468 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 15:59:00,663 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,SelfDestructingSolverStorable11 [2022-07-22 15:59:00,663 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:00,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2022-07-22 15:59:00,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:00,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653975115] [2022-07-22 15:59:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:00,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:00,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:00,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938468317] [2022-07-22 15:59:00,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:59:00,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:00,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:00,671 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 15:59:00,671 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 15:59:00,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:59:00,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:59:00,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 15:59:00,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 15:59:01,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:01,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:01,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653975115] [2022-07-22 15:59:01,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:01,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938468317] [2022-07-22 15:59:01,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938468317] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:59:01,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:59:01,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-22 15:59:01,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454410347] [2022-07-22 15:59:01,290 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:01,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 15:59:01,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 15:59:01,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-22 15:59:01,291 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-22 15:59:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:01,610 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2022-07-22 15:59:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 15:59:01,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 69 [2022-07-22 15:59:01,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:01,612 INFO L225 Difference]: With dead ends: 315 [2022-07-22 15:59:01,612 INFO L226 Difference]: Without dead ends: 313 [2022-07-22 15:59:01,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-07-22 15:59:01,613 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 49 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:01,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 245 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:59:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-07-22 15:59:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2022-07-22 15:59:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 215 states have internal predecessors, (246), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-07-22 15:59:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 388 transitions. [2022-07-22 15:59:01,631 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 388 transitions. Word has length 69 [2022-07-22 15:59:01,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:01,631 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 388 transitions. [2022-07-22 15:59:01,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-22 15:59:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 388 transitions. [2022-07-22 15:59:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 15:59:01,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:01,632 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2022-07-22 15:59:01,651 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 15:59:01,840 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,SelfDestructingSolverStorable12 [2022-07-22 15:59:01,840 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:01,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:01,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2022-07-22 15:59:01,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:01,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007775489] [2022-07-22 15:59:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:01,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:01,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:01,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250094295] [2022-07-22 15:59:01,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:59:01,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:01,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:01,849 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 15:59:01,850 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 15:59:01,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 15:59:01,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:59:01,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 15:59:01,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 36 proven. 26 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-22 15:59:02,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 36 proven. 17 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 15:59:03,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:03,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007775489] [2022-07-22 15:59:03,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:03,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250094295] [2022-07-22 15:59:03,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250094295] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:59:03,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:59:03,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-07-22 15:59:03,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788523516] [2022-07-22 15:59:03,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:03,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 15:59:03,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:03,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 15:59:03,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-07-22 15:59:03,661 INFO L87 Difference]: Start difference. First operand 310 states and 388 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-22 15:59:05,677 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 15:59:24,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.75s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:59:26,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:26,667 INFO L93 Difference]: Finished difference Result 427 states and 568 transitions. [2022-07-22 15:59:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 15:59:26,667 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74 [2022-07-22 15:59:26,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:26,669 INFO L225 Difference]: With dead ends: 427 [2022-07-22 15:59:26,669 INFO L226 Difference]: Without dead ends: 423 [2022-07-22 15:59:26,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=289, Invalid=971, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 15:59:26,670 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 183 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 163 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:26,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 256 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 730 Invalid, 2 Unknown, 0 Unchecked, 11.8s Time] [2022-07-22 15:59:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-22 15:59:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 388. [2022-07-22 15:59:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 254 states have (on average 1.2283464566929134) internal successors, (312), 264 states have internal predecessors, (312), 101 states have call successors, (101), 33 states have call predecessors, (101), 32 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-07-22 15:59:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 510 transitions. [2022-07-22 15:59:26,743 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 510 transitions. Word has length 74 [2022-07-22 15:59:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:26,744 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 510 transitions. [2022-07-22 15:59:26,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-22 15:59:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 510 transitions. [2022-07-22 15:59:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 15:59:26,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:26,745 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2022-07-22 15:59:26,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:26,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 15:59:26,958 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:26,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:26,958 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2022-07-22 15:59:26,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:26,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163934311] [2022-07-22 15:59:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:26,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:26,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:26,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735117005] [2022-07-22 15:59:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:26,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:26,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:26,966 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:59:26,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 15:59:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:59:27,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 15:59:27,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-22 15:59:27,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-22 15:59:27,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:27,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163934311] [2022-07-22 15:59:27,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:27,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735117005] [2022-07-22 15:59:27,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735117005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:59:27,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:59:27,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-22 15:59:27,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103525363] [2022-07-22 15:59:27,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:27,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 15:59:27,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:27,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 15:59:27,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-22 15:59:27,746 INFO L87 Difference]: Start difference. First operand 388 states and 510 transitions. Second operand has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-22 15:59:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:31,265 INFO L93 Difference]: Finished difference Result 450 states and 597 transitions. [2022-07-22 15:59:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 15:59:31,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 80 [2022-07-22 15:59:31,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:31,268 INFO L225 Difference]: With dead ends: 450 [2022-07-22 15:59:31,268 INFO L226 Difference]: Without dead ends: 439 [2022-07-22 15:59:31,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 15:59:31,269 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 94 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:31,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 388 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 15:59:31,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-22 15:59:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 429. [2022-07-22 15:59:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 284 states have (on average 1.2288732394366197) internal successors, (349), 292 states have internal predecessors, (349), 111 states have call successors, (111), 33 states have call predecessors, (111), 33 states have return successors, (109), 103 states have call predecessors, (109), 109 states have call successors, (109) [2022-07-22 15:59:31,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 569 transitions. [2022-07-22 15:59:31,325 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 569 transitions. Word has length 80 [2022-07-22 15:59:31,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:31,325 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 569 transitions. [2022-07-22 15:59:31,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-22 15:59:31,326 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 569 transitions. [2022-07-22 15:59:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-22 15:59:31,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:31,326 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:59:31,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:31,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:31,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:31,544 INFO L85 PathProgramCache]: Analyzing trace with hash 164622435, now seen corresponding path program 4 times [2022-07-22 15:59:31,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:31,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929182508] [2022-07-22 15:59:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:31,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:31,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:31,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371117637] [2022-07-22 15:59:31,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:59:31,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:31,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:31,551 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:59:31,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 15:59:31,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:59:31,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:59:31,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 15:59:31,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-22 15:59:31,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:59:31,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:31,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929182508] [2022-07-22 15:59:31,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:31,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371117637] [2022-07-22 15:59:31,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371117637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:59:31,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:59:31,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 15:59:31,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135873685] [2022-07-22 15:59:31,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:59:31,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:59:31,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:31,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:59:31,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:59:31,614 INFO L87 Difference]: Start difference. First operand 429 states and 569 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-22 15:59:31,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:31,747 INFO L93 Difference]: Finished difference Result 656 states and 926 transitions. [2022-07-22 15:59:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:59:31,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 96 [2022-07-22 15:59:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:31,749 INFO L225 Difference]: With dead ends: 656 [2022-07-22 15:59:31,749 INFO L226 Difference]: Without dead ends: 491 [2022-07-22 15:59:31,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:59:31,750 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:31,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 163 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:59:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-22 15:59:31,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 456. [2022-07-22 15:59:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 301 states have (on average 1.2425249169435215) internal successors, (374), 309 states have internal predecessors, (374), 121 states have call successors, (121), 33 states have call predecessors, (121), 33 states have return successors, (119), 113 states have call predecessors, (119), 119 states have call successors, (119) [2022-07-22 15:59:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 614 transitions. [2022-07-22 15:59:31,821 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 614 transitions. Word has length 96 [2022-07-22 15:59:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:31,822 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 614 transitions. [2022-07-22 15:59:31,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-22 15:59:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 614 transitions. [2022-07-22 15:59:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 15:59:31,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:31,824 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2022-07-22 15:59:31,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:32,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 15:59:32,039 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:32,040 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2022-07-22 15:59:32,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:32,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84508333] [2022-07-22 15:59:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:32,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:32,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:32,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167866496] [2022-07-22 15:59:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:32,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:32,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:32,063 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:59:32,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 15:59:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:59:32,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:59:32,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-22 15:59:32,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-07-22 15:59:32,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:32,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84508333] [2022-07-22 15:59:32,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:32,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167866496] [2022-07-22 15:59:32,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167866496] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:59:32,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:59:32,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-07-22 15:59:32,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751968654] [2022-07-22 15:59:32,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:32,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 15:59:32,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:32,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 15:59:32,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-07-22 15:59:32,343 INFO L87 Difference]: Start difference. First operand 456 states and 614 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-07-22 15:59:32,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:32,848 INFO L93 Difference]: Finished difference Result 1502 states and 2076 transitions. [2022-07-22 15:59:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 15:59:32,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 112 [2022-07-22 15:59:32,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:32,853 INFO L225 Difference]: With dead ends: 1502 [2022-07-22 15:59:32,854 INFO L226 Difference]: Without dead ends: 1289 [2022-07-22 15:59:32,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2022-07-22 15:59:32,855 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 266 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:32,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 469 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:59:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-07-22 15:59:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1265. [2022-07-22 15:59:33,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 799 states have (on average 1.1952440550688361) internal successors, (955), 820 states have internal predecessors, (955), 360 states have call successors, (360), 105 states have call predecessors, (360), 105 states have return successors, (351), 339 states have call predecessors, (351), 351 states have call successors, (351) [2022-07-22 15:59:33,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1666 transitions. [2022-07-22 15:59:33,075 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1666 transitions. Word has length 112 [2022-07-22 15:59:33,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:33,075 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 1666 transitions. [2022-07-22 15:59:33,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-07-22 15:59:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1666 transitions. [2022-07-22 15:59:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-22 15:59:33,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:33,077 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:59:33,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:33,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 15:59:33,291 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1897577373, now seen corresponding path program 1 times [2022-07-22 15:59:33,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:33,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767251387] [2022-07-22 15:59:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:33,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:33,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:33,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233556557] [2022-07-22 15:59:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:33,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:33,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:33,298 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:59:33,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 15:59:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:59:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-22 15:59:33,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 99 proven. 88 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-07-22 15:59:33,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:50,128 WARN L233 SmtUtils]: Spent 14.05s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:59:50,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:50,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767251387] [2022-07-22 15:59:50,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:50,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233556557] [2022-07-22 15:59:50,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233556557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:59:50,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:59:50,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-22 15:59:50,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009269106] [2022-07-22 15:59:50,130 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:50,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 15:59:50,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 15:59:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-22 15:59:50,131 INFO L87 Difference]: Start difference. First operand 1265 states and 1666 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-22 15:59:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:50,843 INFO L93 Difference]: Finished difference Result 1358 states and 1786 transitions. [2022-07-22 15:59:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 15:59:50,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 115 [2022-07-22 15:59:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:50,848 INFO L225 Difference]: With dead ends: 1358 [2022-07-22 15:59:50,848 INFO L226 Difference]: Without dead ends: 1356 [2022-07-22 15:59:50,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-07-22 15:59:50,849 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 29 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:50,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 338 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:59:50,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-07-22 15:59:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1348. [2022-07-22 15:59:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 846 states have (on average 1.1926713947990544) internal successors, (1009), 867 states have internal predecessors, (1009), 388 states have call successors, (388), 113 states have call predecessors, (388), 113 states have return successors, (379), 367 states have call predecessors, (379), 379 states have call successors, (379) [2022-07-22 15:59:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1776 transitions. [2022-07-22 15:59:51,068 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1776 transitions. Word has length 115 [2022-07-22 15:59:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:51,069 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 1776 transitions. [2022-07-22 15:59:51,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-22 15:59:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1776 transitions. [2022-07-22 15:59:51,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-22 15:59:51,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:51,070 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:59:51,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:51,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 15:59:51,282 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:51,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:51,282 INFO L85 PathProgramCache]: Analyzing trace with hash 364386885, now seen corresponding path program 2 times [2022-07-22 15:59:51,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:51,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797599627] [2022-07-22 15:59:51,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:51,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:51,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:51,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744030861] [2022-07-22 15:59:51,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:59:51,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:51,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:51,289 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:59:51,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 15:59:51,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:59:51,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:59:51,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-22 15:59:51,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 106 proven. 112 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-07-22 15:59:51,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 134 proven. 23 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-07-22 15:59:52,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:52,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797599627] [2022-07-22 15:59:52,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:52,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744030861] [2022-07-22 15:59:52,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744030861] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:59:52,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:59:52,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-07-22 15:59:52,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716405385] [2022-07-22 15:59:52,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:52,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 15:59:52,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:52,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 15:59:52,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-07-22 15:59:52,310 INFO L87 Difference]: Start difference. First operand 1348 states and 1776 transitions. Second operand has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-22 15:59:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:55,174 INFO L93 Difference]: Finished difference Result 1521 states and 1959 transitions. [2022-07-22 15:59:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 15:59:55,175 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) Word has length 119 [2022-07-22 15:59:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:55,183 INFO L225 Difference]: With dead ends: 1521 [2022-07-22 15:59:55,183 INFO L226 Difference]: Without dead ends: 1517 [2022-07-22 15:59:55,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-07-22 15:59:55,184 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 100 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:55,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 356 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 15:59:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-07-22 15:59:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1507. [2022-07-22 15:59:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 952 states have (on average 1.1775210084033614) internal successors, (1121), 972 states have internal predecessors, (1121), 413 states have call successors, (413), 142 states have call predecessors, (413), 141 states have return successors, (404), 392 states have call predecessors, (404), 404 states have call successors, (404) [2022-07-22 15:59:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 1938 transitions. [2022-07-22 15:59:55,423 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 1938 transitions. Word has length 119 [2022-07-22 15:59:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:55,423 INFO L495 AbstractCegarLoop]: Abstraction has 1507 states and 1938 transitions. [2022-07-22 15:59:55,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-22 15:59:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 1938 transitions. [2022-07-22 15:59:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-22 15:59:55,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:55,425 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:59:55,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:55,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:55,632 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:55,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:55,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1036292276, now seen corresponding path program 1 times [2022-07-22 15:59:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:55,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245114257] [2022-07-22 15:59:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:55,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:55,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:55,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426710211] [2022-07-22 15:59:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:55,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:55,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:55,651 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:59:55,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 15:59:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:59:55,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:59:55,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-22 15:59:55,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:59:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-07-22 15:59:55,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:59:55,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245114257] [2022-07-22 15:59:55,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:59:55,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426710211] [2022-07-22 15:59:55,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426710211] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:59:55,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:59:55,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-07-22 15:59:55,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048454889] [2022-07-22 15:59:55,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:59:55,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 15:59:55,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:59:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 15:59:55,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-07-22 15:59:55,968 INFO L87 Difference]: Start difference. First operand 1507 states and 1938 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2022-07-22 15:59:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:59:56,515 INFO L93 Difference]: Finished difference Result 1573 states and 2000 transitions. [2022-07-22 15:59:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 15:59:56,515 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 129 [2022-07-22 15:59:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:59:56,520 INFO L225 Difference]: With dead ends: 1573 [2022-07-22 15:59:56,520 INFO L226 Difference]: Without dead ends: 1533 [2022-07-22 15:59:56,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-07-22 15:59:56,521 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 223 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:59:56,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 360 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:59:56,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-07-22 15:59:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1519. [2022-07-22 15:59:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 964 states have (on average 1.1483402489626555) internal successors, (1107), 984 states have internal predecessors, (1107), 413 states have call successors, (413), 142 states have call predecessors, (413), 141 states have return successors, (404), 392 states have call predecessors, (404), 404 states have call successors, (404) [2022-07-22 15:59:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 1924 transitions. [2022-07-22 15:59:56,768 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 1924 transitions. Word has length 129 [2022-07-22 15:59:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:59:56,769 INFO L495 AbstractCegarLoop]: Abstraction has 1519 states and 1924 transitions. [2022-07-22 15:59:56,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2022-07-22 15:59:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 1924 transitions. [2022-07-22 15:59:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-22 15:59:56,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:59:56,770 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:59:56,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 15:59:56,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:56,983 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:59:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:59:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2066876172, now seen corresponding path program 2 times [2022-07-22 15:59:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:59:56,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110811358] [2022-07-22 15:59:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:59:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:59:56,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:59:56,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264064235] [2022-07-22 15:59:56,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:59:56,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:59:56,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:59:56,991 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:59:56,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 15:59:57,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:59:57,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:59:57,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-22 15:59:57,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:59:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 147 proven. 111 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-07-22 15:59:59,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:00:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-22 16:00:01,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:00:01,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110811358] [2022-07-22 16:00:01,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:00:01,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264064235] [2022-07-22 16:00:01,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264064235] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:00:01,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:00:01,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 30 [2022-07-22 16:00:01,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827079291] [2022-07-22 16:00:01,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:00:01,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 16:00:01,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:00:01,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 16:00:01,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-07-22 16:00:01,087 INFO L87 Difference]: Start difference. First operand 1519 states and 1924 transitions. Second operand has 30 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-07-22 16:00:20,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:00:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:00:21,190 INFO L93 Difference]: Finished difference Result 1639 states and 2065 transitions. [2022-07-22 16:00:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 16:00:21,190 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) Word has length 130 [2022-07-22 16:00:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:00:21,195 INFO L225 Difference]: With dead ends: 1639 [2022-07-22 16:00:21,195 INFO L226 Difference]: Without dead ends: 1599 [2022-07-22 16:00:21,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=524, Invalid=2556, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 16:00:21,196 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 132 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:00:21,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 499 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-07-22 16:00:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2022-07-22 16:00:21,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1348. [2022-07-22 16:00:21,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 855 states have (on average 1.1321637426900584) internal successors, (968), 870 states have internal predecessors, (968), 350 states have call successors, (350), 142 states have call predecessors, (350), 142 states have return successors, (348), 335 states have call predecessors, (348), 348 states have call successors, (348) [2022-07-22 16:00:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1666 transitions. [2022-07-22 16:00:21,423 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1666 transitions. Word has length 130 [2022-07-22 16:00:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:00:21,423 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 1666 transitions. [2022-07-22 16:00:21,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-07-22 16:00:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1666 transitions. [2022-07-22 16:00:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-22 16:00:21,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:00:21,425 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:00:21,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 16:00:21,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-22 16:00:21,632 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:00:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:00:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash 724097753, now seen corresponding path program 3 times [2022-07-22 16:00:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:00:21,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990915632] [2022-07-22 16:00:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:00:21,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:00:21,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:00:21,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437428537] [2022-07-22 16:00:21,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:00:21,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:00:21,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:00:21,640 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:00:21,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 16:00:22,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 16:00:22,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:00:22,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-22 16:00:22,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:00:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 132 proven. 86 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2022-07-22 16:00:33,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:01:17,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:01:17,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990915632] [2022-07-22 16:01:17,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:01:17,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437428537] [2022-07-22 16:01:17,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437428537] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:01:17,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:01:17,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-22 16:01:17,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49911685] [2022-07-22 16:01:17,480 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:01:17,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 16:01:17,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:01:17,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 16:01:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=597, Unknown=8, NotChecked=0, Total=756 [2022-07-22 16:01:17,481 INFO L87 Difference]: Start difference. First operand 1348 states and 1666 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-07-22 16:01:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:01:31,429 INFO L93 Difference]: Finished difference Result 1867 states and 2281 transitions. [2022-07-22 16:01:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 16:01:31,430 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 147 [2022-07-22 16:01:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:01:31,437 INFO L225 Difference]: With dead ends: 1867 [2022-07-22 16:01:31,437 INFO L226 Difference]: Without dead ends: 1865 [2022-07-22 16:01:31,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=228, Invalid=954, Unknown=8, NotChecked=0, Total=1190 [2022-07-22 16:01:31,438 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 75 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-07-22 16:01:31,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 403 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-07-22 16:01:31,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-07-22 16:01:31,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1844. [2022-07-22 16:01:31,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1177 states have (on average 1.1163976210705182) internal successors, (1314), 1191 states have internal predecessors, (1314), 470 states have call successors, (470), 196 states have call predecessors, (470), 196 states have return successors, (468), 456 states have call predecessors, (468), 468 states have call successors, (468) [2022-07-22 16:01:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2252 transitions. [2022-07-22 16:01:31,763 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2252 transitions. Word has length 147 [2022-07-22 16:01:31,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:01:31,763 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 2252 transitions. [2022-07-22 16:01:31,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-07-22 16:01:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2252 transitions. [2022-07-22 16:01:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-07-22 16:01:31,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:01:31,765 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:01:31,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 16:01:31,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 16:01:31,977 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:01:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:01:31,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1547189055, now seen corresponding path program 4 times [2022-07-22 16:01:31,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:01:31,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940652319] [2022-07-22 16:01:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:01:31,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:01:31,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:01:31,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136059572] [2022-07-22 16:01:31,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:01:31,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:01:31,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:01:31,992 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:01:31,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 16:01:32,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:01:32,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:01:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-22 16:01:32,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:01:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 286 proven. 176 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2022-07-22 16:01:37,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:01:41,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:01:41,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940652319] [2022-07-22 16:01:41,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:01:41,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136059572] [2022-07-22 16:01:41,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136059572] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:01:41,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:01:41,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-22 16:01:41,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468798199] [2022-07-22 16:01:41,050 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:01:41,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 16:01:41,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:01:41,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 16:01:41,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2022-07-22 16:01:41,051 INFO L87 Difference]: Start difference. First operand 1844 states and 2252 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2022-07-22 16:01:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:01:45,750 INFO L93 Difference]: Finished difference Result 2013 states and 2429 transitions. [2022-07-22 16:01:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 16:01:45,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) Word has length 170 [2022-07-22 16:01:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:01:45,756 INFO L225 Difference]: With dead ends: 2013 [2022-07-22 16:01:45,757 INFO L226 Difference]: Without dead ends: 2011 [2022-07-22 16:01:45,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-07-22 16:01:45,757 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 47 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:01:45,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 378 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 807 Invalid, 0 Unknown, 77 Unchecked, 4.1s Time] [2022-07-22 16:01:45,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-07-22 16:01:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 2003. [2022-07-22 16:01:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 1281 states have (on average 1.1124121779859484) internal successors, (1425), 1295 states have internal predecessors, (1425), 498 states have call successors, (498), 223 states have call predecessors, (498), 223 states have return successors, (496), 484 states have call predecessors, (496), 496 states have call successors, (496) [2022-07-22 16:01:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 2419 transitions. [2022-07-22 16:01:46,101 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 2419 transitions. Word has length 170 [2022-07-22 16:01:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:01:46,101 INFO L495 AbstractCegarLoop]: Abstraction has 2003 states and 2419 transitions. [2022-07-22 16:01:46,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2022-07-22 16:01:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 2419 transitions. [2022-07-22 16:01:46,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-22 16:01:46,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:01:46,103 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:01:46,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-22 16:01:46,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:01:46,320 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:01:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:01:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash -164722535, now seen corresponding path program 5 times [2022-07-22 16:01:46,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:01:46,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875356087] [2022-07-22 16:01:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:01:46,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:01:46,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:01:46,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217009229] [2022-07-22 16:01:46,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 16:01:46,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:01:46,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:01:46,328 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:01:46,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 16:01:47,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-22 16:01:47,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:01:47,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-22 16:01:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:01:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 115 proven. 232 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2022-07-22 16:01:49,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:46,112 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_132| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_125| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_169| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_204| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_137| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_198| Int)) (let ((.cse19 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_125|)) (.cse18 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| (- 1) |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_125|))) (let ((.cse16 (+ .cse18 |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_198|)) (.cse17 (+ |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_204| (* (- 1) .cse19)))) (let ((.cse3 (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_169| 2)) (.cse4 (* (- 2) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274| .cse17)) (.cse0 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274|)) (.cse5 (* (- 2) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250| .cse16)) (.cse2 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250|))) (let ((.cse1 (+ .cse3 .cse4 .cse0 .cse5 .cse2)) (.cse8 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_198|)) (.cse9 (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_204| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274|)) (.cse6 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_125|)) (.cse7 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_125|))) (or (not (= (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274| .cse1) .cse2) (+ .cse3 .cse4 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241| |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_137|) .cse0 .cse5 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_132|) .cse2))) (= (+ .cse0 .cse2) .cse1) (<= (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_169| (* 2 .cse0) (* .cse6 4) (* .cse7 4) (* 2 .cse2)) (+ (* .cse8 4) (* 4 .cse9))) (<= (+ (* 2 .cse8) (* 2 .cse9)) (+ (* 2 .cse6) .cse0 (* 2 .cse7) .cse2)) (= (let ((.cse13 (+ (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| (- 1)) (* 2 .cse18) (* 2 |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_198|))) (.cse12 (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_204| 2) (* (- 1) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241|) (* .cse19 (- 2)))) (.cse10 (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274| (+ .cse19 |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241| (* (- 1) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_204|)))) (.cse11 (* (- 1) (+ |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| (* (- 1) .cse18) (* (- 1) |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_198|)) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250|)) (.cse14 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274| .cse17)) (.cse15 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250| .cse16))) (+ .cse10 .cse11 (* (- 1) (* .cse12 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274|)) (* |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_132| .cse13) (* (- 1) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250| .cse13)) .cse14 .cse15 (* |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_137| .cse12) (* (- 1) (* (+ .cse10 .cse11 .cse14 .cse15) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274|)))) 0)))))))) is different from true [2022-07-22 16:03:21,861 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_132| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_125| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_169| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_204| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_137| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_198| Int)) (let ((.cse19 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_125|)) (.cse18 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| (- 1) |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_125|))) (let ((.cse16 (+ .cse18 |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_198|)) (.cse17 (+ |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_204| (* (- 1) .cse19)))) (let ((.cse3 (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_169| 2)) (.cse4 (* (- 2) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274| .cse17)) (.cse0 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274|)) (.cse5 (* (- 2) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250| .cse16)) (.cse2 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250|))) (let ((.cse1 (+ .cse3 .cse4 .cse0 .cse5 .cse2)) (.cse8 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_198|)) (.cse9 (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_204| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274|)) (.cse6 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_125|)) (.cse7 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_125|))) (or (not (= (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274| .cse1) .cse2) (+ .cse3 .cse4 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241| |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_137|) .cse0 .cse5 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_132|) .cse2))) (= (+ .cse0 .cse2) .cse1) (<= (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_169| (* 2 .cse0) (* .cse6 4) (* .cse7 4) (* 2 .cse2)) (+ (* .cse8 4) (* 4 .cse9))) (<= (+ (* 2 .cse8) (* 2 .cse9)) (+ (* 2 .cse6) .cse0 (* 2 .cse7) .cse2)) (= (let ((.cse13 (+ (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| (- 1)) (* 2 .cse18) (* 2 |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_198|))) (.cse12 (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_204| 2) (* (- 1) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241|) (* .cse19 (- 2)))) (.cse10 (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274| (+ .cse19 |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_241| (* (- 1) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_204|)))) (.cse11 (* (- 1) (+ |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_244| (* (- 1) .cse18) (* (- 1) |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_198|)) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250|)) (.cse14 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274| .cse17)) (.cse15 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250| .cse16))) (+ .cse10 .cse11 (* (- 1) (* .cse12 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274|)) (* |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_132| .cse13) (* (- 1) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_250| .cse13)) .cse14 .cse15 (* |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_137| .cse12) (* (- 1) (* (+ .cse10 .cse11 .cse14 .cse15) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_274|)))) 0)))))))) is different from true