./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/array-patterns/array4_pattern.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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:50:14,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:50:14,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:50:14,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:50:14,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:50:14,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:50:14,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:50:14,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:50:14,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:50:14,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:50:14,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:50:14,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:50:14,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:50:14,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:50:14,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:50:14,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:50:14,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:50:14,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:50:14,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:50:14,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:50:14,283 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:50:14,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:50:14,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:50:14,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:50:14,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:50:14,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:50:14,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:50:14,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:50:14,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:50:14,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:50:14,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:50:14,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:50:14,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:50:14,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:50:14,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:50:14,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:50:14,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:50:14,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:50:14,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:50:14,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:50:14,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:50:14,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:50:14,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:50:14,334 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:50:14,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:50:14,335 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:50:14,335 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:50:14,336 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:50:14,336 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:50:14,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:50:14,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:50:14,337 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:50:14,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:50:14,338 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:50:14,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:50:14,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:50:14,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:50:14,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:50:14,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:50:14,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:50:14,339 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:50:14,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:50:14,340 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:50:14,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:50:14,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:50:14,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:50:14,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:50:14,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:50:14,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:50:14,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:50:14,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:50:14,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:50:14,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:50:14,342 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:50:14,342 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:50:14,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:50:14,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2022-07-13 10:50:14,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:50:14,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:50:14,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:50:14,589 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:50:14,590 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:50:14,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2022-07-13 10:50:14,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bcf0b1ab/537df7154a234040a35fe9ef405f4243/FLAGd570d69ca [2022-07-13 10:50:14,996 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:50:14,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2022-07-13 10:50:15,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bcf0b1ab/537df7154a234040a35fe9ef405f4243/FLAGd570d69ca [2022-07-13 10:50:15,428 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bcf0b1ab/537df7154a234040a35fe9ef405f4243 [2022-07-13 10:50:15,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:50:15,431 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:50:15,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:50:15,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:50:15,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:50:15,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:50:15" (1/1) ... [2022-07-13 10:50:15,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@361ead0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15, skipping insertion in model container [2022-07-13 10:50:15,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:50:15" (1/1) ... [2022-07-13 10:50:15,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:50:15,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:50:15,572 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/array-patterns/array4_pattern.c[1835,1848] [2022-07-13 10:50:15,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:50:15,593 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:50:15,603 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/array-patterns/array4_pattern.c[1835,1848] [2022-07-13 10:50:15,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:50:15,621 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:50:15,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15 WrapperNode [2022-07-13 10:50:15,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:50:15,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:50:15,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:50:15,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:50:15,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15" (1/1) ... [2022-07-13 10:50:15,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15" (1/1) ... [2022-07-13 10:50:15,649 INFO L137 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2022-07-13 10:50:15,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:50:15,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:50:15,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:50:15,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:50:15,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15" (1/1) ... [2022-07-13 10:50:15,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15" (1/1) ... [2022-07-13 10:50:15,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15" (1/1) ... [2022-07-13 10:50:15,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15" (1/1) ... [2022-07-13 10:50:15,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15" (1/1) ... [2022-07-13 10:50:15,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15" (1/1) ... [2022-07-13 10:50:15,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15" (1/1) ... [2022-07-13 10:50:15,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:50:15,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:50:15,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:50:15,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:50:15,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15" (1/1) ... [2022-07-13 10:50:15,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:50:15,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:15,715 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) [2022-07-13 10:50:15,724 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 [2022-07-13 10:50:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:50:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-13 10:50:15,744 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-13 10:50:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:50:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:50:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:50:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:50:15,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:50:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:50:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:50:15,798 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:50:15,799 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:50:15,913 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:50:15,918 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:50:15,919 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 10:50:15,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:50:15 BoogieIcfgContainer [2022-07-13 10:50:15,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:50:15,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:50:15,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:50:15,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:50:15,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:50:15" (1/3) ... [2022-07-13 10:50:15,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c3998d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:50:15, skipping insertion in model container [2022-07-13 10:50:15,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:50:15" (2/3) ... [2022-07-13 10:50:15,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c3998d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:50:15, skipping insertion in model container [2022-07-13 10:50:15,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:50:15" (3/3) ... [2022-07-13 10:50:15,940 INFO L111 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2022-07-13 10:50:15,951 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:50:15,952 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:50:15,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:50:15,993 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@2aad8c30, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6644ee09 [2022-07-13 10:50:15,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:50:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 10:50:16,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 10:50:16,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:16,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:50:16,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:16,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2022-07-13 10:50:16,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:16,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139762523] [2022-07-13 10:50:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:50:16,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:50:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:50:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:50:16,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:16,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139762523] [2022-07-13 10:50:16,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139762523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:50:16,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:50:16,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 10:50:16,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628108106] [2022-07-13 10:50:16,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:50:16,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 10:50:16,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:16,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 10:50:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:50:16,194 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 10:50:16,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:16,212 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2022-07-13 10:50:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 10:50:16,214 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-13 10:50:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:16,222 INFO L225 Difference]: With dead ends: 63 [2022-07-13 10:50:16,222 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 10:50:16,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:50:16,231 INFO L413 NwaCegarLoop]: 40 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, 40 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 [2022-07-13 10:50:16,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:50:16,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 10:50:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-13 10:50:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 10:50:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-07-13 10:50:16,284 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2022-07-13 10:50:16,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:16,284 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-07-13 10:50:16,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 10:50:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-07-13 10:50:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-13 10:50:16,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:16,289 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-07-13 10:50:16,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 10:50:16,290 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:16,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:16,292 INFO L85 PathProgramCache]: Analyzing trace with hash -852430543, now seen corresponding path program 1 times [2022-07-13 10:50:16,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:16,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443141273] [2022-07-13 10:50:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:16,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:16,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:16,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670388727] [2022-07-13 10:50:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:16,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:16,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:16,356 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) [2022-07-13 10:50:16,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:50:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:50:16,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 10:50:16,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:50:16,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:50:16,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:16,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443141273] [2022-07-13 10:50:16,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:16,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670388727] [2022-07-13 10:50:16,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670388727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:50:16,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:50:16,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 10:50:16,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008741044] [2022-07-13 10:50:16,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:50:16,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:50:16,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:16,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:50:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:50:16,576 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 10:50:16,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:16,645 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2022-07-13 10:50:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:50:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-07-13 10:50:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:16,647 INFO L225 Difference]: With dead ends: 70 [2022-07-13 10:50:16,647 INFO L226 Difference]: Without dead ends: 48 [2022-07-13 10:50:16,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:50:16,649 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:50:16,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:50:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-13 10:50:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-07-13 10:50:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 10:50:16,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-07-13 10:50:16,658 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2022-07-13 10:50:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:16,660 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-07-13 10:50:16,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 10:50:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-07-13 10:50:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-13 10:50:16,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:16,662 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-07-13 10:50:16,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:50:16,875 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 [2022-07-13 10:50:16,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:16,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:16,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1661777169, now seen corresponding path program 1 times [2022-07-13 10:50:16,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:16,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825370933] [2022-07-13 10:50:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:16,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:16,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:16,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787366298] [2022-07-13 10:50:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:16,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:16,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:16,907 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) [2022-07-13 10:50:16,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:50:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:50:16,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 10:50:16,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:50:17,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:50:17,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:17,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825370933] [2022-07-13 10:50:17,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:17,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787366298] [2022-07-13 10:50:17,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787366298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:50:17,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:50:17,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:50:17,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649301829] [2022-07-13 10:50:17,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:50:17,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:50:17,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:17,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:50:17,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:50:17,025 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 10:50:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:17,041 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-07-13 10:50:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:50:17,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-07-13 10:50:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:17,043 INFO L225 Difference]: With dead ends: 43 [2022-07-13 10:50:17,043 INFO L226 Difference]: Without dead ends: 39 [2022-07-13 10:50:17,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:50:17,045 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:50:17,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:50:17,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-13 10:50:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-13 10:50:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 10:50:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-07-13 10:50:17,053 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2022-07-13 10:50:17,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:17,054 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-07-13 10:50:17,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 10:50:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-07-13 10:50:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 10:50:17,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:17,055 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-07-13 10:50:17,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:50:17,267 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 [2022-07-13 10:50:17,267 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:17,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:17,268 INFO L85 PathProgramCache]: Analyzing trace with hash 813208561, now seen corresponding path program 1 times [2022-07-13 10:50:17,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:17,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544492141] [2022-07-13 10:50:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:17,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:17,292 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:17,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168237709] [2022-07-13 10:50:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:17,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:17,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:17,294 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) [2022-07-13 10:50:17,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:50:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:50:17,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:50:17,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:50:17,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:50:17,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:17,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544492141] [2022-07-13 10:50:17,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:17,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168237709] [2022-07-13 10:50:17,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168237709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:50:17,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:50:17,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 10:50:17,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499516336] [2022-07-13 10:50:17,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:50:17,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 10:50:17,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:17,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 10:50:17,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:50:17,465 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 10:50:17,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:17,561 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-07-13 10:50:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 10:50:17,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-07-13 10:50:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:17,565 INFO L225 Difference]: With dead ends: 77 [2022-07-13 10:50:17,565 INFO L226 Difference]: Without dead ends: 43 [2022-07-13 10:50:17,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:50:17,570 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:50:17,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:50:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-13 10:50:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-07-13 10:50:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 10:50:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-07-13 10:50:17,577 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 44 [2022-07-13 10:50:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:17,578 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-07-13 10:50:17,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 10:50:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-07-13 10:50:17,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 10:50:17,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:17,580 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1] [2022-07-13 10:50:17,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:50:17,791 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 [2022-07-13 10:50:17,792 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1843316237, now seen corresponding path program 1 times [2022-07-13 10:50:17,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:17,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653402402] [2022-07-13 10:50:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:17,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:17,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:17,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473012309] [2022-07-13 10:50:17,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:17,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:17,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:17,822 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) [2022-07-13 10:50:17,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:50:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:50:17,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 10:50:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:17,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 10:50:17,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:17,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-07-13 10:50:17,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:50:18,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:50:18,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 26 [2022-07-13 10:50:18,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:50:18,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:50:18,933 INFO L356 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-07-13 10:50:18,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 24 [2022-07-13 10:50:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 10:50:18,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:50:24,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:24,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653402402] [2022-07-13 10:50:24,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:24,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473012309] [2022-07-13 10:50:24,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473012309] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:50:24,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:50:24,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-13 10:50:24,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201033262] [2022-07-13 10:50:24,341 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 10:50:24,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:50:24,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:24,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:50:24,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=454, Unknown=3, NotChecked=0, Total=552 [2022-07-13 10:50:24,342 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 10:50:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:24,559 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-07-13 10:50:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 10:50:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2022-07-13 10:50:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:24,560 INFO L225 Difference]: With dead ends: 79 [2022-07-13 10:50:24,560 INFO L226 Difference]: Without dead ends: 75 [2022-07-13 10:50:24,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=124, Invalid=629, Unknown=3, NotChecked=0, Total=756 [2022-07-13 10:50:24,562 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 35 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:50:24,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 254 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 111 Invalid, 0 Unknown, 157 Unchecked, 0.1s Time] [2022-07-13 10:50:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-13 10:50:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2022-07-13 10:50:24,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-13 10:50:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2022-07-13 10:50:24,573 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 46 [2022-07-13 10:50:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:24,573 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2022-07-13 10:50:24,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 10:50:24,574 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2022-07-13 10:50:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 10:50:24,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:24,575 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1] [2022-07-13 10:50:24,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:50:24,791 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 [2022-07-13 10:50:24,791 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1847143947, now seen corresponding path program 2 times [2022-07-13 10:50:24,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:24,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487030461] [2022-07-13 10:50:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:24,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:24,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:24,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218674370] [2022-07-13 10:50:24,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:50:24,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:24,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:24,818 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) [2022-07-13 10:50:24,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:50:24,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:50:24,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:50:24,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 10:50:24,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:50:24,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:50:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:50:25,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:25,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487030461] [2022-07-13 10:50:25,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:25,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218674370] [2022-07-13 10:50:25,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218674370] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:50:25,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:50:25,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-13 10:50:25,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542038981] [2022-07-13 10:50:25,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:50:25,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 10:50:25,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:25,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 10:50:25,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:50:25,025 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:50:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:25,274 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2022-07-13 10:50:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 10:50:25,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2022-07-13 10:50:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:25,276 INFO L225 Difference]: With dead ends: 150 [2022-07-13 10:50:25,276 INFO L226 Difference]: Without dead ends: 123 [2022-07-13 10:50:25,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-13 10:50:25,277 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 79 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:50:25,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 185 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:50:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-13 10:50:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2022-07-13 10:50:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-13 10:50:25,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2022-07-13 10:50:25,292 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 48 [2022-07-13 10:50:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:25,293 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2022-07-13 10:50:25,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:50:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2022-07-13 10:50:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 10:50:25,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:25,294 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1] [2022-07-13 10:50:25,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:50:25,517 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 [2022-07-13 10:50:25,517 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:25,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:25,518 INFO L85 PathProgramCache]: Analyzing trace with hash 741894005, now seen corresponding path program 3 times [2022-07-13 10:50:25,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:25,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305232375] [2022-07-13 10:50:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:25,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:25,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:25,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760355906] [2022-07-13 10:50:25,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:50:25,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:25,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:25,551 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) [2022-07-13 10:50:25,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:50:25,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-13 10:50:25,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:50:25,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-13 10:50:25,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:25,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 10:50:26,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:26,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 40 [2022-07-13 10:50:26,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:50:26,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-07-13 10:50:26,320 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:50:26,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 41 [2022-07-13 10:50:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 10:50:26,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:50:26,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:26,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305232375] [2022-07-13 10:50:26,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:26,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760355906] [2022-07-13 10:50:26,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760355906] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:50:26,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:50:26,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-13 10:50:26,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035993543] [2022-07-13 10:50:26,799 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 10:50:26,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 10:50:26,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:26,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 10:50:26,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-07-13 10:50:26,800 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 10:50:27,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:27,156 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2022-07-13 10:50:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 10:50:27,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2022-07-13 10:50:27,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:27,160 INFO L225 Difference]: With dead ends: 136 [2022-07-13 10:50:27,160 INFO L226 Difference]: Without dead ends: 132 [2022-07-13 10:50:27,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 10:50:27,161 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:50:27,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 124 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 204 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-07-13 10:50:27,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-13 10:50:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-07-13 10:50:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 91 states have internal predecessors, (99), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-13 10:50:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 157 transitions. [2022-07-13 10:50:27,178 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 157 transitions. Word has length 48 [2022-07-13 10:50:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:27,179 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 157 transitions. [2022-07-13 10:50:27,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 10:50:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 157 transitions. [2022-07-13 10:50:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 10:50:27,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:27,180 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 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] [2022-07-13 10:50:27,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:50:27,404 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 [2022-07-13 10:50:27,404 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:27,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:27,405 INFO L85 PathProgramCache]: Analyzing trace with hash 48801527, now seen corresponding path program 4 times [2022-07-13 10:50:27,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:27,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296406057] [2022-07-13 10:50:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:27,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:27,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:27,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901059579] [2022-07-13 10:50:27,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:50:27,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:27,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:27,433 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) [2022-07-13 10:50:27,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:50:27,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:50:27,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:50:27,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-13 10:50:27,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:27,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 10:50:27,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:27,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-07-13 10:50:27,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-07-13 10:50:27,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:50:27,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:50:27,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:27,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:27,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-07-13 10:50:29,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:29,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:29,988 INFO L356 Elim1Store]: treesize reduction 114, result has 42.1 percent of original size [2022-07-13 10:50:29,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 117 [2022-07-13 10:50:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:31,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:50:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:31,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:50:31,473 INFO L356 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2022-07-13 10:50:31,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 140 treesize of output 72 [2022-07-13 10:50:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 10:50:31,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:50:36,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:36,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296406057] [2022-07-13 10:50:36,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:36,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901059579] [2022-07-13 10:50:36,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901059579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:50:36,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:50:36,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-13 10:50:36,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701423714] [2022-07-13 10:50:36,559 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 10:50:36,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 10:50:36,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:36,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 10:50:36,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1070, Unknown=1, NotChecked=0, Total=1260 [2022-07-13 10:50:36,560 INFO L87 Difference]: Start difference. First operand 126 states and 157 transitions. Second operand has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 10:50:36,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:36,712 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-07-13 10:50:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 10:50:36,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2022-07-13 10:50:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:36,714 INFO L225 Difference]: With dead ends: 160 [2022-07-13 10:50:36,714 INFO L226 Difference]: Without dead ends: 156 [2022-07-13 10:50:36,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=196, Invalid=1135, Unknown=1, NotChecked=0, Total=1332 [2022-07-13 10:50:36,715 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 32 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:50:36,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 392 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 312 Unchecked, 0.1s Time] [2022-07-13 10:50:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-13 10:50:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2022-07-13 10:50:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 110 states have internal predecessors, (120), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-13 10:50:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2022-07-13 10:50:36,745 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 50 [2022-07-13 10:50:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:36,745 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2022-07-13 10:50:36,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 10:50:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2022-07-13 10:50:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 10:50:36,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:36,747 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 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, 1, 1, 1, 1] [2022-07-13 10:50:36,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:50:36,967 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 [2022-07-13 10:50:36,968 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:36,968 INFO L85 PathProgramCache]: Analyzing trace with hash -293138951, now seen corresponding path program 5 times [2022-07-13 10:50:36,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:36,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429004126] [2022-07-13 10:50:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:36,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:36,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:37,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276243892] [2022-07-13 10:50:37,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:50:37,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:37,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:37,015 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) [2022-07-13 10:50:37,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:50:37,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-13 10:50:37,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:50:37,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:50:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:50:37,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:50:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:50:37,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:37,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429004126] [2022-07-13 10:50:37,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276243892] [2022-07-13 10:50:37,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276243892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:50:37,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:50:37,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-13 10:50:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172090613] [2022-07-13 10:50:37,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:50:37,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 10:50:37,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 10:50:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-13 10:50:37,212 INFO L87 Difference]: Start difference. First operand 151 states and 186 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:50:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:37,539 INFO L93 Difference]: Finished difference Result 330 states and 412 transitions. [2022-07-13 10:50:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 10:50:37,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2022-07-13 10:50:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:37,541 INFO L225 Difference]: With dead ends: 330 [2022-07-13 10:50:37,541 INFO L226 Difference]: Without dead ends: 252 [2022-07-13 10:50:37,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:50:37,543 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 196 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:50:37,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 212 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:50:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-07-13 10:50:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 218. [2022-07-13 10:50:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 151 states have (on average 1.119205298013245) internal successors, (169), 154 states have internal predecessors, (169), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-13 10:50:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 279 transitions. [2022-07-13 10:50:37,566 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 279 transitions. Word has length 52 [2022-07-13 10:50:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:37,566 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 279 transitions. [2022-07-13 10:50:37,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:50:37,566 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 279 transitions. [2022-07-13 10:50:37,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 10:50:37,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:37,568 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 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, 1, 1, 1, 1] [2022-07-13 10:50:37,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:50:37,795 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 [2022-07-13 10:50:37,796 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:37,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:37,796 INFO L85 PathProgramCache]: Analyzing trace with hash 986268537, now seen corresponding path program 6 times [2022-07-13 10:50:37,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:37,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128834308] [2022-07-13 10:50:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:37,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:37,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:37,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693095574] [2022-07-13 10:50:37,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:50:37,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:37,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:37,816 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) [2022-07-13 10:50:37,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:50:37,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-13 10:50:37,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:50:37,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:50:37,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:50:38,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:50:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:50:38,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:38,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128834308] [2022-07-13 10:50:38,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:38,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693095574] [2022-07-13 10:50:38,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693095574] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:50:38,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:50:38,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-13 10:50:38,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026251194] [2022-07-13 10:50:38,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:50:38,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 10:50:38,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:38,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 10:50:38,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-13 10:50:38,109 INFO L87 Difference]: Start difference. First operand 218 states and 279 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:50:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:38,487 INFO L93 Difference]: Finished difference Result 247 states and 306 transitions. [2022-07-13 10:50:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 10:50:38,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2022-07-13 10:50:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:38,490 INFO L225 Difference]: With dead ends: 247 [2022-07-13 10:50:38,490 INFO L226 Difference]: Without dead ends: 243 [2022-07-13 10:50:38,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:50:38,491 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 78 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:50:38,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 301 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:50:38,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-13 10:50:38,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 223. [2022-07-13 10:50:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 158 states have internal predecessors, (173), 55 states have call successors, (55), 12 states have call predecessors, (55), 12 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-13 10:50:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 283 transitions. [2022-07-13 10:50:38,512 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 283 transitions. Word has length 52 [2022-07-13 10:50:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:38,513 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 283 transitions. [2022-07-13 10:50:38,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:50:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 283 transitions. [2022-07-13 10:50:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 10:50:38,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:38,514 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:50:38,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:50:38,727 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 [2022-07-13 10:50:38,728 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:38,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1330474501, now seen corresponding path program 7 times [2022-07-13 10:50:38,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:38,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043031387] [2022-07-13 10:50:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:38,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:38,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:38,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364246182] [2022-07-13 10:50:38,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:50:38,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:38,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:38,750 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) [2022-07-13 10:50:38,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:50:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:50:38,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-13 10:50:38,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:38,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 10:50:38,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:38,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-07-13 10:50:38,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-07-13 10:50:38,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:50:38,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:50:39,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:39,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:39,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-07-13 10:50:39,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:39,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:39,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:39,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:39,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:39,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:39,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-07-13 10:50:44,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:44,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:44,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:44,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:44,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:44,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:44,151 INFO L356 Elim1Store]: treesize reduction 132, result has 39.7 percent of original size [2022-07-13 10:50:44,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 127 [2022-07-13 10:50:44,981 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-07-13 10:50:44,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 169 treesize of output 85 [2022-07-13 10:50:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 10:50:45,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:50:47,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:47,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043031387] [2022-07-13 10:50:47,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:47,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364246182] [2022-07-13 10:50:47,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364246182] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:50:47,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:50:47,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-13 10:50:47,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49785419] [2022-07-13 10:50:47,838 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 10:50:47,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 10:50:47,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 10:50:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1103, Unknown=5, NotChecked=0, Total=1260 [2022-07-13 10:50:47,840 INFO L87 Difference]: Start difference. First operand 223 states and 283 transitions. Second operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 25 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 10:50:48,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:48,843 INFO L93 Difference]: Finished difference Result 266 states and 334 transitions. [2022-07-13 10:50:48,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 10:50:48,843 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 25 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 54 [2022-07-13 10:50:48,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:48,845 INFO L225 Difference]: With dead ends: 266 [2022-07-13 10:50:48,845 INFO L226 Difference]: Without dead ends: 262 [2022-07-13 10:50:48,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=197, Invalid=1520, Unknown=5, NotChecked=0, Total=1722 [2022-07-13 10:50:48,846 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 40 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:50:48,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 367 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 851 Invalid, 0 Unknown, 83 Unchecked, 0.7s Time] [2022-07-13 10:50:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-13 10:50:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2022-07-13 10:50:48,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 174 states have (on average 1.1149425287356323) internal successors, (194), 177 states have internal predecessors, (194), 59 states have call successors, (59), 14 states have call predecessors, (59), 14 states have return successors, (59), 56 states have call predecessors, (59), 59 states have call successors, (59) [2022-07-13 10:50:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 312 transitions. [2022-07-13 10:50:48,883 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 312 transitions. Word has length 54 [2022-07-13 10:50:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:48,883 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 312 transitions. [2022-07-13 10:50:48,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 25 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 10:50:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 312 transitions. [2022-07-13 10:50:48,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 10:50:48,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:48,886 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1] [2022-07-13 10:50:48,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:50:49,104 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 [2022-07-13 10:50:49,105 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:49,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:49,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1367492605, now seen corresponding path program 8 times [2022-07-13 10:50:49,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:49,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680703288] [2022-07-13 10:50:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:49,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:49,132 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:49,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533550151] [2022-07-13 10:50:49,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:50:49,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:49,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:49,144 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) [2022-07-13 10:50:49,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:50:49,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:50:49,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:50:49,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 10:50:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:50:49,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:50:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:50:49,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:49,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680703288] [2022-07-13 10:50:49,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:49,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533550151] [2022-07-13 10:50:49,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533550151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:50:49,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:50:49,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-13 10:50:49,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870290989] [2022-07-13 10:50:49,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:50:49,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 10:50:49,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:49,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 10:50:49,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-13 10:50:49,380 INFO L87 Difference]: Start difference. First operand 248 states and 312 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:50:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:50,064 INFO L93 Difference]: Finished difference Result 544 states and 693 transitions. [2022-07-13 10:50:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 10:50:50,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-07-13 10:50:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:50,066 INFO L225 Difference]: With dead ends: 544 [2022-07-13 10:50:50,067 INFO L226 Difference]: Without dead ends: 393 [2022-07-13 10:50:50,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2022-07-13 10:50:50,068 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 292 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:50:50,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 306 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 10:50:50,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-13 10:50:50,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 338. [2022-07-13 10:50:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 232 states have (on average 1.1163793103448276) internal successors, (259), 236 states have internal predecessors, (259), 89 states have call successors, (89), 16 states have call predecessors, (89), 16 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2022-07-13 10:50:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 437 transitions. [2022-07-13 10:50:50,109 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 437 transitions. Word has length 56 [2022-07-13 10:50:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:50,110 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 437 transitions. [2022-07-13 10:50:50,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:50:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 437 transitions. [2022-07-13 10:50:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 10:50:50,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:50,111 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1] [2022-07-13 10:50:50,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 10:50:50,323 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 [2022-07-13 10:50:50,323 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:50,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1777525379, now seen corresponding path program 9 times [2022-07-13 10:50:50,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:50,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506918223] [2022-07-13 10:50:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:50,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:50,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:50,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347588582] [2022-07-13 10:50:50,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:50:50,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:50,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:50,364 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) [2022-07-13 10:50:50,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:50:50,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-13 10:50:50,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:50:50,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 10:50:50,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:50:50,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:50:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:50:50,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:50,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506918223] [2022-07-13 10:50:50,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:50,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347588582] [2022-07-13 10:50:50,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347588582] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:50:50,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:50:50,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-13 10:50:50,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549369799] [2022-07-13 10:50:50,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:50:50,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 10:50:50,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 10:50:50,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-13 10:50:50,696 INFO L87 Difference]: Start difference. First operand 338 states and 437 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:50:51,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:50:51,164 INFO L93 Difference]: Finished difference Result 372 states and 468 transitions. [2022-07-13 10:50:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 10:50:51,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-07-13 10:50:51,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:50:51,166 INFO L225 Difference]: With dead ends: 372 [2022-07-13 10:50:51,166 INFO L226 Difference]: Without dead ends: 368 [2022-07-13 10:50:51,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-07-13 10:50:51,167 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 125 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:50:51,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 310 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 10:50:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-07-13 10:50:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 340. [2022-07-13 10:50:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 234 states have (on average 1.1153846153846154) internal successors, (261), 238 states have internal predecessors, (261), 89 states have call successors, (89), 16 states have call predecessors, (89), 16 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2022-07-13 10:50:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 439 transitions. [2022-07-13 10:50:51,214 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 439 transitions. Word has length 56 [2022-07-13 10:50:51,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:50:51,215 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 439 transitions. [2022-07-13 10:50:51,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:50:51,215 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 439 transitions. [2022-07-13 10:50:51,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 10:50:51,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:50:51,216 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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] [2022-07-13 10:50:51,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 10:50:51,428 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 [2022-07-13 10:50:51,428 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:50:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:50:51,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1248328447, now seen corresponding path program 10 times [2022-07-13 10:50:51,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:50:51,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295186269] [2022-07-13 10:50:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:50:51,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:50:51,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:50:51,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357735519] [2022-07-13 10:50:51,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:50:51,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:50:51,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:50:51,476 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) [2022-07-13 10:50:51,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 10:50:51,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:50:51,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:50:51,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 118 conjunts are in the unsatisfiable core [2022-07-13 10:50:51,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:50:51,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 10:50:51,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:51,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-07-13 10:50:51,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:50:51,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-13 10:50:51,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:51,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:51,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-07-13 10:50:51,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:51,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:51,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:51,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:51,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-07-13 10:50:52,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:52,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:52,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:52,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:52,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:52,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:52,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:52,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:52,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:52,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:52,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2022-07-13 10:50:53,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:53,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:53,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:53,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:53,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:53,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:53,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:53,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:53,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:53,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:53,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:53,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:53,491 INFO L356 Elim1Store]: treesize reduction 180, result has 39.4 percent of original size [2022-07-13 10:50:53,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 163 [2022-07-13 10:50:55,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:55,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:55,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:50:55,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:50:55,236 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-07-13 10:50:55,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 269 treesize of output 139 [2022-07-13 10:50:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:50:55,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:50:58,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:50:58,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295186269] [2022-07-13 10:50:58,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:50:58,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357735519] [2022-07-13 10:50:58,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357735519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:50:58,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:50:58,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-07-13 10:50:58,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607961508] [2022-07-13 10:50:58,765 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 10:50:58,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-13 10:50:58,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:50:58,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-13 10:50:58,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=2286, Unknown=0, NotChecked=0, Total=2652 [2022-07-13 10:50:58,767 INFO L87 Difference]: Start difference. First operand 340 states and 439 transitions. Second operand has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 10:51:00,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:51:00,572 INFO L93 Difference]: Finished difference Result 382 states and 490 transitions. [2022-07-13 10:51:00,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 10:51:00,572 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 58 [2022-07-13 10:51:00,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:51:00,574 INFO L225 Difference]: With dead ends: 382 [2022-07-13 10:51:00,574 INFO L226 Difference]: Without dead ends: 378 [2022-07-13 10:51:00,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=434, Invalid=2758, Unknown=0, NotChecked=0, Total=3192 [2022-07-13 10:51:00,576 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 53 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:51:00,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 408 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1169 Invalid, 0 Unknown, 95 Unchecked, 1.2s Time] [2022-07-13 10:51:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-13 10:51:00,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 361. [2022-07-13 10:51:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 250 states have (on average 1.116) internal successors, (279), 254 states have internal predecessors, (279), 93 states have call successors, (93), 17 states have call predecessors, (93), 17 states have return successors, (93), 89 states have call predecessors, (93), 93 states have call successors, (93) [2022-07-13 10:51:00,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 465 transitions. [2022-07-13 10:51:00,626 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 465 transitions. Word has length 58 [2022-07-13 10:51:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:51:00,626 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 465 transitions. [2022-07-13 10:51:00,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 10:51:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 465 transitions. [2022-07-13 10:51:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 10:51:00,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:51:00,631 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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] [2022-07-13 10:51:00,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 10:51:00,835 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 [2022-07-13 10:51:00,835 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:51:00,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:51:00,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1400995841, now seen corresponding path program 11 times [2022-07-13 10:51:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:51:00,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751922191] [2022-07-13 10:51:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:51:00,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:51:00,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:51:00,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208343312] [2022-07-13 10:51:00,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:51:00,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:51:00,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:51:00,869 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) [2022-07-13 10:51:00,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 10:51:00,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-13 10:51:00,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:51:00,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 10:51:00,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:51:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:51:01,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:51:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:51:01,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:51:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751922191] [2022-07-13 10:51:01,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:51:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208343312] [2022-07-13 10:51:01,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208343312] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:51:01,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:51:01,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-07-13 10:51:01,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150053733] [2022-07-13 10:51:01,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:51:01,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 10:51:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:51:01,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 10:51:01,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:51:01,190 INFO L87 Difference]: Start difference. First operand 361 states and 465 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:51:02,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:51:02,035 INFO L93 Difference]: Finished difference Result 849 states and 1100 transitions. [2022-07-13 10:51:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 10:51:02,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2022-07-13 10:51:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:51:02,038 INFO L225 Difference]: With dead ends: 849 [2022-07-13 10:51:02,039 INFO L226 Difference]: Without dead ends: 604 [2022-07-13 10:51:02,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 10:51:02,040 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 520 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 10:51:02,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 400 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 10:51:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-07-13 10:51:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 471. [2022-07-13 10:51:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 320 states have (on average 1.11875) internal successors, (358), 325 states have internal predecessors, (358), 131 states have call successors, (131), 19 states have call predecessors, (131), 19 states have return successors, (131), 126 states have call predecessors, (131), 131 states have call successors, (131) [2022-07-13 10:51:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 620 transitions. [2022-07-13 10:51:02,090 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 620 transitions. Word has length 60 [2022-07-13 10:51:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:51:02,090 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 620 transitions. [2022-07-13 10:51:02,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:51:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 620 transitions. [2022-07-13 10:51:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 10:51:02,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:51:02,091 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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] [2022-07-13 10:51:02,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 10:51:02,313 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 [2022-07-13 10:51:02,313 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:51:02,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:51:02,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1599277695, now seen corresponding path program 12 times [2022-07-13 10:51:02,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:51:02,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151892659] [2022-07-13 10:51:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:51:02,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:51:02,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:51:02,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842354599] [2022-07-13 10:51:02,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:51:02,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:51:02,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:51:02,331 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) [2022-07-13 10:51:02,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 10:51:02,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-13 10:51:02,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:51:02,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 10:51:02,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:51:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:51:02,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:51:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:51:02,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:51:02,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151892659] [2022-07-13 10:51:02,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:51:02,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842354599] [2022-07-13 10:51:02,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842354599] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:51:02,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:51:02,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-07-13 10:51:02,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364202000] [2022-07-13 10:51:02,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:51:02,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 10:51:02,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:51:02,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 10:51:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:51:02,734 INFO L87 Difference]: Start difference. First operand 471 states and 620 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:51:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:51:03,421 INFO L93 Difference]: Finished difference Result 523 states and 668 transitions. [2022-07-13 10:51:03,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 10:51:03,422 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2022-07-13 10:51:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:51:03,424 INFO L225 Difference]: With dead ends: 523 [2022-07-13 10:51:03,425 INFO L226 Difference]: Without dead ends: 519 [2022-07-13 10:51:03,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-07-13 10:51:03,426 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 126 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:51:03,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 646 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 10:51:03,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-07-13 10:51:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 473. [2022-07-13 10:51:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 322 states have (on average 1.1180124223602483) internal successors, (360), 327 states have internal predecessors, (360), 131 states have call successors, (131), 19 states have call predecessors, (131), 19 states have return successors, (131), 126 states have call predecessors, (131), 131 states have call successors, (131) [2022-07-13 10:51:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 622 transitions. [2022-07-13 10:51:03,483 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 622 transitions. Word has length 60 [2022-07-13 10:51:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:51:03,484 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 622 transitions. [2022-07-13 10:51:03,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:51:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 622 transitions. [2022-07-13 10:51:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 10:51:03,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:51:03,485 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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] [2022-07-13 10:51:03,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 10:51:03,710 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 [2022-07-13 10:51:03,710 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:51:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:51:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash 745660931, now seen corresponding path program 13 times [2022-07-13 10:51:03,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:51:03,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876682791] [2022-07-13 10:51:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:51:03,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:51:03,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:51:03,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489078139] [2022-07-13 10:51:03,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:51:03,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:51:03,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:51:03,726 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) [2022-07-13 10:51:03,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 10:51:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:51:03,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 140 conjunts are in the unsatisfiable core [2022-07-13 10:51:03,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:51:03,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 10:51:04,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-07-13 10:51:04,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-07-13 10:51:04,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:51:04,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:51:04,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2022-07-13 10:51:04,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2022-07-13 10:51:04,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 103 [2022-07-13 10:51:04,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:04,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 115 [2022-07-13 10:51:14,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:14,500 INFO L356 Elim1Store]: treesize reduction 228, result has 39.2 percent of original size [2022-07-13 10:51:14,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 199 [2022-07-13 10:51:17,437 INFO L356 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2022-07-13 10:51:17,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2022-07-13 10:51:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 66 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 10:51:17,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:51:30,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:51:30,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876682791] [2022-07-13 10:51:30,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:51:30,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489078139] [2022-07-13 10:51:30,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489078139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:51:30,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:51:30,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-07-13 10:51:30,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811723161] [2022-07-13 10:51:30,617 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 10:51:30,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-13 10:51:30,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:51:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-13 10:51:30,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=3448, Unknown=11, NotChecked=0, Total=3782 [2022-07-13 10:51:30,619 INFO L87 Difference]: Start difference. First operand 473 states and 622 transitions. Second operand has 40 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 35 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 10:51:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:51:33,068 INFO L93 Difference]: Finished difference Result 522 states and 679 transitions. [2022-07-13 10:51:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-13 10:51:33,071 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 35 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 62 [2022-07-13 10:51:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:51:33,073 INFO L225 Difference]: With dead ends: 522 [2022-07-13 10:51:33,073 INFO L226 Difference]: Without dead ends: 518 [2022-07-13 10:51:33,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=341, Invalid=3680, Unknown=11, NotChecked=0, Total=4032 [2022-07-13 10:51:33,075 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 48 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:51:33,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 459 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1623 Invalid, 0 Unknown, 100 Unchecked, 2.1s Time] [2022-07-13 10:51:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-07-13 10:51:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 498. [2022-07-13 10:51:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 341 states have (on average 1.1173020527859236) internal successors, (381), 346 states have internal predecessors, (381), 135 states have call successors, (135), 21 states have call predecessors, (135), 21 states have return successors, (135), 130 states have call predecessors, (135), 135 states have call successors, (135) [2022-07-13 10:51:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 651 transitions. [2022-07-13 10:51:33,127 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 651 transitions. Word has length 62 [2022-07-13 10:51:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:51:33,127 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 651 transitions. [2022-07-13 10:51:33,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 35 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 10:51:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 651 transitions. [2022-07-13 10:51:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 10:51:33,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:51:33,129 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 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] [2022-07-13 10:51:33,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 10:51:33,343 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 [2022-07-13 10:51:33,343 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:51:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:51:33,344 INFO L85 PathProgramCache]: Analyzing trace with hash -626149883, now seen corresponding path program 14 times [2022-07-13 10:51:33,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:51:33,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158955012] [2022-07-13 10:51:33,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:51:33,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:51:33,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:51:33,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041083983] [2022-07-13 10:51:33,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:51:33,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:51:33,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:51:33,369 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) [2022-07-13 10:51:33,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 10:51:33,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:51:33,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:51:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 10:51:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:51:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 52 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:51:33,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:51:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:51:33,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:51:33,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158955012] [2022-07-13 10:51:33,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:51:33,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041083983] [2022-07-13 10:51:33,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041083983] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:51:33,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:51:33,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-07-13 10:51:33,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520169029] [2022-07-13 10:51:33,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:51:33,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 10:51:33,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:51:33,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 10:51:33,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-07-13 10:51:33,705 INFO L87 Difference]: Start difference. First operand 498 states and 651 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:51:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:51:34,949 INFO L93 Difference]: Finished difference Result 1237 states and 1619 transitions. [2022-07-13 10:51:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 10:51:34,950 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2022-07-13 10:51:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:51:34,953 INFO L225 Difference]: With dead ends: 1237 [2022-07-13 10:51:34,954 INFO L226 Difference]: Without dead ends: 878 [2022-07-13 10:51:34,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=475, Invalid=1417, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 10:51:34,956 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 760 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 10:51:34,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 491 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 10:51:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-07-13 10:51:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 630. [2022-07-13 10:51:35,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 425 states have (on average 1.12) internal successors, (476), 431 states have internal predecessors, (476), 181 states have call successors, (181), 23 states have call predecessors, (181), 23 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2022-07-13 10:51:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 838 transitions. [2022-07-13 10:51:35,028 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 838 transitions. Word has length 64 [2022-07-13 10:51:35,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:51:35,028 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 838 transitions. [2022-07-13 10:51:35,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:51:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 838 transitions. [2022-07-13 10:51:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 10:51:35,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:51:35,030 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 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] [2022-07-13 10:51:35,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 10:51:35,252 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 [2022-07-13 10:51:35,253 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:51:35,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:51:35,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1965962363, now seen corresponding path program 15 times [2022-07-13 10:51:35,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:51:35,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292468333] [2022-07-13 10:51:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:51:35,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:51:35,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:51:35,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72546872] [2022-07-13 10:51:35,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:51:35,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:51:35,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:51:35,275 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) [2022-07-13 10:51:35,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 10:51:35,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-13 10:51:35,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:51:35,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 10:51:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:51:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:51:35,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:51:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:51:35,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:51:35,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292468333] [2022-07-13 10:51:35,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:51:35,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72546872] [2022-07-13 10:51:35,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72546872] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:51:35,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:51:35,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-07-13 10:51:35,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824292269] [2022-07-13 10:51:35,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:51:35,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 10:51:35,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:51:35,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 10:51:35,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-07-13 10:51:35,774 INFO L87 Difference]: Start difference. First operand 630 states and 838 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:51:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:51:36,787 INFO L93 Difference]: Finished difference Result 704 states and 907 transitions. [2022-07-13 10:51:36,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 10:51:36,788 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2022-07-13 10:51:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:51:36,793 INFO L225 Difference]: With dead ends: 704 [2022-07-13 10:51:36,793 INFO L226 Difference]: Without dead ends: 700 [2022-07-13 10:51:36,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 10:51:36,794 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 163 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 10:51:36,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 781 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 10:51:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-07-13 10:51:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 632. [2022-07-13 10:51:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 427 states have (on average 1.1194379391100702) internal successors, (478), 433 states have internal predecessors, (478), 181 states have call successors, (181), 23 states have call predecessors, (181), 23 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2022-07-13 10:51:36,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 840 transitions. [2022-07-13 10:51:36,861 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 840 transitions. Word has length 64 [2022-07-13 10:51:36,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:51:36,861 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 840 transitions. [2022-07-13 10:51:36,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:51:36,861 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 840 transitions. [2022-07-13 10:51:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 10:51:36,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:51:36,863 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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] [2022-07-13 10:51:36,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 10:51:37,075 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 [2022-07-13 10:51:37,075 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:51:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:51:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash 549013255, now seen corresponding path program 16 times [2022-07-13 10:51:37,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:51:37,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330764698] [2022-07-13 10:51:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:51:37,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:51:37,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:51:37,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166768860] [2022-07-13 10:51:37,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:51:37,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:51:37,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:51:37,101 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) [2022-07-13 10:51:37,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 10:51:37,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:51:37,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:51:37,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 153 conjunts are in the unsatisfiable core [2022-07-13 10:51:37,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:51:37,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 10:51:37,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-07-13 10:51:37,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-07-13 10:51:37,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:51:37,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:51:37,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-07-13 10:51:37,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-07-13 10:51:37,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2022-07-13 10:51:37,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 115 [2022-07-13 10:51:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:37,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 145 [2022-07-13 10:51:39,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:39,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:40,061 INFO L356 Elim1Store]: treesize reduction 276, result has 39.1 percent of original size [2022-07-13 10:51:40,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 12 case distinctions, treesize of input 144 treesize of output 235 [2022-07-13 10:51:45,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:51:45,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:51:45,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:51:45,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:51:45,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:51:45,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:51:45,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:51:45,397 INFO L356 Elim1Store]: treesize reduction 188, result has 17.9 percent of original size [2022-07-13 10:51:45,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 15 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 514 treesize of output 254 [2022-07-13 10:51:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:51:45,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:52:03,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:52:03,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330764698] [2022-07-13 10:52:03,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:52:03,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166768860] [2022-07-13 10:52:03,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166768860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:52:03,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:52:03,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-07-13 10:52:03,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591081368] [2022-07-13 10:52:03,005 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 10:52:03,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-13 10:52:03,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:52:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-13 10:52:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=4005, Unknown=6, NotChecked=0, Total=4556 [2022-07-13 10:52:03,006 INFO L87 Difference]: Start difference. First operand 632 states and 840 transitions. Second operand has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 10:52:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:52:06,821 INFO L93 Difference]: Finished difference Result 680 states and 897 transitions. [2022-07-13 10:52:06,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-13 10:52:06,822 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 66 [2022-07-13 10:52:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:52:06,825 INFO L225 Difference]: With dead ends: 680 [2022-07-13 10:52:06,826 INFO L226 Difference]: Without dead ends: 676 [2022-07-13 10:52:06,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=613, Invalid=4493, Unknown=6, NotChecked=0, Total=5112 [2022-07-13 10:52:06,829 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 51 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-13 10:52:06,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 610 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2093 Invalid, 0 Unknown, 164 Unchecked, 2.8s Time] [2022-07-13 10:52:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-07-13 10:52:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 653. [2022-07-13 10:52:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 443 states have (on average 1.1196388261851016) internal successors, (496), 449 states have internal predecessors, (496), 185 states have call successors, (185), 24 states have call predecessors, (185), 24 states have return successors, (185), 179 states have call predecessors, (185), 185 states have call successors, (185) [2022-07-13 10:52:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 866 transitions. [2022-07-13 10:52:06,913 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 866 transitions. Word has length 66 [2022-07-13 10:52:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:52:06,913 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 866 transitions. [2022-07-13 10:52:06,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 10:52:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 866 transitions. [2022-07-13 10:52:06,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 10:52:06,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:52:06,915 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 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] [2022-07-13 10:52:06,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 10:52:07,135 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 [2022-07-13 10:52:07,135 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:52:07,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:52:07,136 INFO L85 PathProgramCache]: Analyzing trace with hash -626005495, now seen corresponding path program 17 times [2022-07-13 10:52:07,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:52:07,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635106266] [2022-07-13 10:52:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:52:07,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:52:07,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:52:07,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734366512] [2022-07-13 10:52:07,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:52:07,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:52:07,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:52:07,155 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) [2022-07-13 10:52:07,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 10:52:07,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-13 10:52:07,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:52:07,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 10:52:07,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:52:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 65 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:52:07,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:52:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:52:07,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:52:07,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635106266] [2022-07-13 10:52:07,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:52:07,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734366512] [2022-07-13 10:52:07,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734366512] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:52:07,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:52:07,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-07-13 10:52:07,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405797157] [2022-07-13 10:52:07,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:52:07,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 10:52:07,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:52:07,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 10:52:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-07-13 10:52:07,778 INFO L87 Difference]: Start difference. First operand 653 states and 866 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:52:09,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:52:09,555 INFO L93 Difference]: Finished difference Result 1704 states and 2248 transitions. [2022-07-13 10:52:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-13 10:52:09,556 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2022-07-13 10:52:09,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:52:09,561 INFO L225 Difference]: With dead ends: 1704 [2022-07-13 10:52:09,561 INFO L226 Difference]: Without dead ends: 1209 [2022-07-13 10:52:09,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=698, Invalid=2272, Unknown=0, NotChecked=0, Total=2970 [2022-07-13 10:52:09,564 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 880 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:52:09,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 590 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 10:52:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-07-13 10:52:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 807. [2022-07-13 10:52:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 541 states have (on average 1.121996303142329) internal successors, (607), 548 states have internal predecessors, (607), 239 states have call successors, (239), 26 states have call predecessors, (239), 26 states have return successors, (239), 232 states have call predecessors, (239), 239 states have call successors, (239) [2022-07-13 10:52:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1085 transitions. [2022-07-13 10:52:09,675 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1085 transitions. Word has length 68 [2022-07-13 10:52:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:52:09,675 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1085 transitions. [2022-07-13 10:52:09,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:52:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1085 transitions. [2022-07-13 10:52:09,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 10:52:09,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:52:09,678 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 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] [2022-07-13 10:52:09,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 10:52:09,887 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 [2022-07-13 10:52:09,887 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:52:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:52:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash 304390025, now seen corresponding path program 18 times [2022-07-13 10:52:09,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:52:09,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863507385] [2022-07-13 10:52:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:52:09,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:52:09,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:52:09,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16376855] [2022-07-13 10:52:09,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:52:09,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:52:09,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:52:09,904 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) [2022-07-13 10:52:09,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 10:52:10,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-13 10:52:10,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:52:10,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 10:52:10,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:52:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 52 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:52:10,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:52:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:52:10,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:52:10,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863507385] [2022-07-13 10:52:10,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:52:10,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16376855] [2022-07-13 10:52:10,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16376855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:52:10,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:52:10,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-07-13 10:52:10,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334802839] [2022-07-13 10:52:10,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:52:10,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 10:52:10,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:52:10,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 10:52:10,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-07-13 10:52:10,725 INFO L87 Difference]: Start difference. First operand 807 states and 1085 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:52:11,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:52:11,960 INFO L93 Difference]: Finished difference Result 907 states and 1179 transitions. [2022-07-13 10:52:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 10:52:11,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2022-07-13 10:52:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:52:11,964 INFO L225 Difference]: With dead ends: 907 [2022-07-13 10:52:11,964 INFO L226 Difference]: Without dead ends: 903 [2022-07-13 10:52:11,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=1123, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 10:52:11,965 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 237 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:52:11,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 945 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 10:52:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-07-13 10:52:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 809. [2022-07-13 10:52:12,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 543 states have (on average 1.1215469613259668) internal successors, (609), 550 states have internal predecessors, (609), 239 states have call successors, (239), 26 states have call predecessors, (239), 26 states have return successors, (239), 232 states have call predecessors, (239), 239 states have call successors, (239) [2022-07-13 10:52:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1087 transitions. [2022-07-13 10:52:12,071 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1087 transitions. Word has length 68 [2022-07-13 10:52:12,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:52:12,072 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 1087 transitions. [2022-07-13 10:52:12,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:52:12,072 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1087 transitions. [2022-07-13 10:52:12,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-13 10:52:12,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:52:12,073 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:52:12,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-13 10:52:12,287 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 [2022-07-13 10:52:12,287 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:52:12,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:52:12,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1906516020, now seen corresponding path program 1 times [2022-07-13 10:52:12,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:52:12,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414585069] [2022-07-13 10:52:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:52:12,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:52:12,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:52:12,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542928937] [2022-07-13 10:52:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:52:12,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:52:12,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:52:12,301 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) [2022-07-13 10:52:12,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 10:52:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:52:12,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 10:52:12,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:52:12,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 10:52:12,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:12,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-07-13 10:52:12,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:52:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 84 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 10:52:13,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:52:13,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:52:13,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414585069] [2022-07-13 10:52:13,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:52:13,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542928937] [2022-07-13 10:52:13,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542928937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:52:13,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:52:13,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-13 10:52:13,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388725164] [2022-07-13 10:52:13,430 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 10:52:13,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:52:13,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:52:13,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:52:13,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-07-13 10:52:13,431 INFO L87 Difference]: Start difference. First operand 809 states and 1087 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 10:52:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:52:13,745 INFO L93 Difference]: Finished difference Result 828 states and 1105 transitions. [2022-07-13 10:52:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 10:52:13,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 73 [2022-07-13 10:52:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:52:13,749 INFO L225 Difference]: With dead ends: 828 [2022-07-13 10:52:13,749 INFO L226 Difference]: Without dead ends: 696 [2022-07-13 10:52:13,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 10:52:13,750 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 42 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:52:13,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 325 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 110 Invalid, 0 Unknown, 224 Unchecked, 0.1s Time] [2022-07-13 10:52:13,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-07-13 10:52:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 696. [2022-07-13 10:52:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 469 states have (on average 1.1215351812366738) internal successors, (526), 475 states have internal predecessors, (526), 205 states have call successors, (205), 21 states have call predecessors, (205), 21 states have return successors, (205), 199 states have call predecessors, (205), 205 states have call successors, (205) [2022-07-13 10:52:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 936 transitions. [2022-07-13 10:52:13,848 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 936 transitions. Word has length 73 [2022-07-13 10:52:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:52:13,848 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 936 transitions. [2022-07-13 10:52:13,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 10:52:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 936 transitions. [2022-07-13 10:52:13,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-13 10:52:13,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:52:13,849 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 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] [2022-07-13 10:52:13,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-13 10:52:14,063 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 [2022-07-13 10:52:14,063 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:52:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:52:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash 514271755, now seen corresponding path program 19 times [2022-07-13 10:52:14,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:52:14,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786244575] [2022-07-13 10:52:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:52:14,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:52:14,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:52:14,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792060565] [2022-07-13 10:52:14,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:52:14,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:52:14,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:52:14,085 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) [2022-07-13 10:52:14,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 10:52:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:52:14,559 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 174 conjunts are in the unsatisfiable core [2022-07-13 10:52:14,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:52:14,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 10:52:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-07-13 10:52:14,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-07-13 10:52:14,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:52:14,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-13 10:52:14,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-07-13 10:52:14,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2022-07-13 10:52:14,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:14,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 113 [2022-07-13 10:52:15,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 143 [2022-07-13 10:52:15,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 173 [2022-07-13 10:52:15,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:15,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 163 [2022-07-13 10:52:32,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:52:32,688 INFO L356 Elim1Store]: treesize reduction 324, result has 39.0 percent of original size [2022-07-13 10:52:32,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 44 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 14 case distinctions, treesize of input 162 treesize of output 271 [2022-07-13 10:52:40,436 INFO L356 Elim1Store]: treesize reduction 53, result has 7.0 percent of original size [2022-07-13 10:52:40,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 600 treesize of output 276 [2022-07-13 10:52:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 114 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 10:52:40,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:53:00,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:53:00,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786244575] [2022-07-13 10:53:00,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:53:00,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792060565] [2022-07-13 10:53:00,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792060565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:53:00,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:53:00,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2022-07-13 10:53:00,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839756920] [2022-07-13 10:53:00,606 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 10:53:00,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-13 10:53:00,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:53:00,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-13 10:53:00,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=5004, Unknown=15, NotChecked=0, Total=5402 [2022-07-13 10:53:00,608 INFO L87 Difference]: Start difference. First operand 696 states and 936 transitions. Second operand has 48 states, 45 states have (on average 1.2) internal successors, (54), 43 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 10:53:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:53:11,027 INFO L93 Difference]: Finished difference Result 754 states and 1001 transitions. [2022-07-13 10:53:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-13 10:53:11,031 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.2) internal successors, (54), 43 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 70 [2022-07-13 10:53:11,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:53:11,035 INFO L225 Difference]: With dead ends: 754 [2022-07-13 10:53:11,035 INFO L226 Difference]: Without dead ends: 750 [2022-07-13 10:53:11,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=512, Invalid=7845, Unknown=15, NotChecked=0, Total=8372 [2022-07-13 10:53:11,038 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 93 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 2780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:53:11,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 593 Invalid, 2780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2440 Invalid, 0 Unknown, 250 Unchecked, 4.2s Time] [2022-07-13 10:53:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-07-13 10:53:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 727. [2022-07-13 10:53:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 492 states have (on average 1.1199186991869918) internal successors, (551), 499 states have internal predecessors, (551), 210 states have call successors, (210), 24 states have call predecessors, (210), 24 states have return successors, (210), 203 states have call predecessors, (210), 210 states have call successors, (210) [2022-07-13 10:53:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 971 transitions. [2022-07-13 10:53:11,143 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 971 transitions. Word has length 70 [2022-07-13 10:53:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:53:11,144 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 971 transitions. [2022-07-13 10:53:11,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.2) internal successors, (54), 43 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 10:53:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 971 transitions. [2022-07-13 10:53:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-13 10:53:11,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:53:11,147 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 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] [2022-07-13 10:53:11,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-13 10:53:11,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:53:11,365 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:53:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:53:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1716998410, now seen corresponding path program 2 times [2022-07-13 10:53:11,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:53:11,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254993401] [2022-07-13 10:53:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:53:11,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:53:11,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:53:11,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787849355] [2022-07-13 10:53:11,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:53:11,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:53:11,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:53:11,379 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:53:11,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-13 10:53:11,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:53:11,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:53:11,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 10:53:11,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:53:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-13 10:53:11,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:53:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-13 10:53:11,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:53:11,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254993401] [2022-07-13 10:53:11,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:53:11,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787849355] [2022-07-13 10:53:11,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787849355] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:53:11,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:53:11,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-13 10:53:11,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379587499] [2022-07-13 10:53:11,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:53:11,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 10:53:11,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:53:11,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 10:53:11,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:53:11,658 INFO L87 Difference]: Start difference. First operand 727 states and 971 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:53:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:53:11,939 INFO L93 Difference]: Finished difference Result 754 states and 997 transitions. [2022-07-13 10:53:11,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 10:53:11,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 75 [2022-07-13 10:53:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:53:11,943 INFO L225 Difference]: With dead ends: 754 [2022-07-13 10:53:11,944 INFO L226 Difference]: Without dead ends: 750 [2022-07-13 10:53:11,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:53:11,945 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:53:11,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 72 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:53:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-07-13 10:53:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 724. [2022-07-13 10:53:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 489 states have (on average 1.1186094069529653) internal successors, (547), 496 states have internal predecessors, (547), 210 states have call successors, (210), 24 states have call predecessors, (210), 24 states have return successors, (210), 203 states have call predecessors, (210), 210 states have call successors, (210) [2022-07-13 10:53:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 967 transitions. [2022-07-13 10:53:12,053 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 967 transitions. Word has length 75 [2022-07-13 10:53:12,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:53:12,053 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 967 transitions. [2022-07-13 10:53:12,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:53:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 967 transitions. [2022-07-13 10:53:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-13 10:53:12,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:53:12,055 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 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] [2022-07-13 10:53:12,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-13 10:53:12,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-13 10:53:12,280 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:53:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:53:12,280 INFO L85 PathProgramCache]: Analyzing trace with hash 347151373, now seen corresponding path program 20 times [2022-07-13 10:53:12,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:53:12,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761610758] [2022-07-13 10:53:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:53:12,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:53:12,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:53:12,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995674837] [2022-07-13 10:53:12,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:53:12,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:53:12,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:53:12,301 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:53:12,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-13 10:53:12,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:53:12,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:53:12,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 10:53:12,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:53:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 80 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:53:12,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:53:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:53:12,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:53:12,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761610758] [2022-07-13 10:53:12,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:53:12,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995674837] [2022-07-13 10:53:12,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995674837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:53:12,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:53:12,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2022-07-13 10:53:12,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424472717] [2022-07-13 10:53:12,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:53:12,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 10:53:12,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:53:12,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 10:53:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-07-13 10:53:12,841 INFO L87 Difference]: Start difference. First operand 724 states and 967 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:53:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:53:15,609 INFO L93 Difference]: Finished difference Result 1969 states and 2598 transitions. [2022-07-13 10:53:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-13 10:53:15,609 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2022-07-13 10:53:15,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:53:15,615 INFO L225 Difference]: With dead ends: 1969 [2022-07-13 10:53:15,615 INFO L226 Difference]: Without dead ends: 1405 [2022-07-13 10:53:15,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=921, Invalid=3239, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 10:53:15,618 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 866 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 2774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 889 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 10:53:15,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 1021 Invalid, 2774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [889 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 10:53:15,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-07-13 10:53:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 887. [2022-07-13 10:53:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 593 states have (on average 1.12141652613828) internal successors, (665), 600 states have internal predecessors, (665), 267 states have call successors, (267), 26 states have call predecessors, (267), 26 states have return successors, (267), 260 states have call predecessors, (267), 267 states have call successors, (267) [2022-07-13 10:53:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1199 transitions. [2022-07-13 10:53:15,765 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1199 transitions. Word has length 72 [2022-07-13 10:53:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:53:15,766 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1199 transitions. [2022-07-13 10:53:15,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:53:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1199 transitions. [2022-07-13 10:53:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-13 10:53:15,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:53:15,768 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 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] [2022-07-13 10:53:15,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-13 10:53:15,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 10:53:15,992 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:53:15,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:53:15,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1104048525, now seen corresponding path program 21 times [2022-07-13 10:53:15,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:53:15,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761222874] [2022-07-13 10:53:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:53:15,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:53:16,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:53:16,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985080460] [2022-07-13 10:53:16,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:53:16,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:53:16,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:53:16,007 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:53:16,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-13 10:53:16,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-13 10:53:16,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:53:16,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 10:53:16,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:53:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 65 proven. 64 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:53:16,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:53:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:53:16,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:53:16,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761222874] [2022-07-13 10:53:16,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:53:16,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985080460] [2022-07-13 10:53:16,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985080460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:53:16,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:53:16,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2022-07-13 10:53:16,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497763614] [2022-07-13 10:53:16,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:53:16,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 10:53:16,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:53:16,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 10:53:16,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-07-13 10:53:16,788 INFO L87 Difference]: Start difference. First operand 887 states and 1199 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:53:18,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:53:18,274 INFO L93 Difference]: Finished difference Result 1007 states and 1313 transitions. [2022-07-13 10:53:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 10:53:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2022-07-13 10:53:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:53:18,278 INFO L225 Difference]: With dead ends: 1007 [2022-07-13 10:53:18,278 INFO L226 Difference]: Without dead ends: 1003 [2022-07-13 10:53:18,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 10:53:18,279 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 270 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:53:18,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 1128 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 10:53:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-07-13 10:53:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 889. [2022-07-13 10:53:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 595 states have (on average 1.1210084033613446) internal successors, (667), 602 states have internal predecessors, (667), 267 states have call successors, (267), 26 states have call predecessors, (267), 26 states have return successors, (267), 260 states have call predecessors, (267), 267 states have call successors, (267) [2022-07-13 10:53:18,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1201 transitions. [2022-07-13 10:53:18,428 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1201 transitions. Word has length 72 [2022-07-13 10:53:18,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:53:18,428 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1201 transitions. [2022-07-13 10:53:18,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 10:53:18,428 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1201 transitions. [2022-07-13 10:53:18,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 10:53:18,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:53:18,430 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:53:18,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-13 10:53:18,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-13 10:53:18,643 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:53:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:53:18,644 INFO L85 PathProgramCache]: Analyzing trace with hash 821264204, now seen corresponding path program 3 times [2022-07-13 10:53:18,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:53:18,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500052421] [2022-07-13 10:53:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:53:18,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:53:18,657 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:53:18,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053092551] [2022-07-13 10:53:18,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:53:18,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:53:18,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:53:18,659 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:53:18,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-13 10:53:18,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-13 10:53:18,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:53:18,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-13 10:53:18,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:53:18,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 10:53:18,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-07-13 10:53:18,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 10:53:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:53:18,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 36 [2022-07-13 10:53:18,945 INFO L356 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-07-13 10:53:18,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-07-13 10:53:18,951 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 10:53:18,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-07-13 10:53:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:53:22,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2022-07-13 10:53:22,281 INFO L356 Elim1Store]: treesize reduction 56, result has 43.4 percent of original size [2022-07-13 10:53:22,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 64 [2022-07-13 10:53:22,315 INFO L356 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2022-07-13 10:53:22,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 92