./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/nsqm-if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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-fpi/nsqm-if.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 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 12:35:21,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 12:35:21,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 12:35:21,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 12:35:21,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 12:35:21,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 12:35:21,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 12:35:21,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 12:35:21,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 12:35:21,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 12:35:21,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 12:35:21,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 12:35:21,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 12:35:21,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 12:35:21,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 12:35:21,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 12:35:21,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 12:35:21,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 12:35:21,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 12:35:21,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 12:35:21,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 12:35:21,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 12:35:21,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 12:35:21,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 12:35:21,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 12:35:21,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 12:35:21,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 12:35:21,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 12:35:21,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 12:35:21,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 12:35:21,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 12:35:21,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 12:35:21,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 12:35:21,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 12:35:21,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 12:35:21,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 12:35:21,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 12:35:21,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 12:35:21,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 12:35:21,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 12:35:21,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 12:35:21,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 12:35:21,396 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 12:35:21,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 12:35:21,397 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 12:35:21,397 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 12:35:21,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 12:35:21,398 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 12:35:21,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 12:35:21,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 12:35:21,399 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 12:35:21,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 12:35:21,400 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 12:35:21,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 12:35:21,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 12:35:21,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 12:35:21,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 12:35:21,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 12:35:21,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 12:35:21,401 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 12:35:21,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 12:35:21,402 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 12:35:21,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 12:35:21,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 12:35:21,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 12:35:21,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 12:35:21,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 12:35:21,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 12:35:21,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 12:35:21,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 12:35:21,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 12:35:21,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 12:35:21,404 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 12:35:21,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 12:35:21,404 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 12:35:21,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 12:35:21,405 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 12:35:21,405 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 [2023-02-18 12:35:21,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 12:35:21,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 12:35:21,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 12:35:21,683 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 12:35:21,684 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 12:35:21,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm-if.c [2023-02-18 12:35:22,937 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 12:35:23,110 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 12:35:23,110 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm-if.c [2023-02-18 12:35:23,115 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc38f6e29/885c2ded016b4379bc3c22bd2e567e46/FLAG742797b06 [2023-02-18 12:35:23,131 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc38f6e29/885c2ded016b4379bc3c22bd2e567e46 [2023-02-18 12:35:23,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 12:35:23,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 12:35:23,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 12:35:23,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 12:35:23,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 12:35:23,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60e3470f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23, skipping insertion in model container [2023-02-18 12:35:23,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 12:35:23,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 12:35:23,281 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2023-02-18 12:35:23,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 12:35:23,305 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 12:35:23,313 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2023-02-18 12:35:23,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 12:35:23,332 INFO L208 MainTranslator]: Completed translation [2023-02-18 12:35:23,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23 WrapperNode [2023-02-18 12:35:23,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 12:35:23,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 12:35:23,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 12:35:23,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 12:35:23,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,360 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-02-18 12:35:23,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 12:35:23,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 12:35:23,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 12:35:23,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 12:35:23,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,380 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 12:35:23,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 12:35:23,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 12:35:23,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 12:35:23,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23" (1/1) ... [2023-02-18 12:35:23,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 12:35:23,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:35:23,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 12:35:23,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 12:35:23,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 12:35:23,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 12:35:23,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 12:35:23,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 12:35:23,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 12:35:23,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 12:35:23,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 12:35:23,514 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 12:35:23,516 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 12:35:23,753 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 12:35:23,772 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 12:35:23,773 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 12:35:23,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:35:23 BoogieIcfgContainer [2023-02-18 12:35:23,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 12:35:23,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 12:35:23,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 12:35:23,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 12:35:23,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:35:23" (1/3) ... [2023-02-18 12:35:23,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7e5d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:35:23, skipping insertion in model container [2023-02-18 12:35:23,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:35:23" (2/3) ... [2023-02-18 12:35:23,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7e5d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:35:23, skipping insertion in model container [2023-02-18 12:35:23,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:35:23" (3/3) ... [2023-02-18 12:35:23,795 INFO L112 eAbstractionObserver]: Analyzing ICFG nsqm-if.c [2023-02-18 12:35:23,811 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 12:35:23,812 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 12:35:23,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 12:35:23,867 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@19b85785, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 12:35:23,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 12:35:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 12:35:23,877 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:35:23,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:35:23,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:35:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:35:23,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2023-02-18 12:35:23,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:35:23,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149607727] [2023-02-18 12:35:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:23,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:35:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:35:24,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:35:24,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149607727] [2023-02-18 12:35:24,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 12:35:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005067536] [2023-02-18 12:35:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:24,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:24,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:35:24,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:35:24,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 12:35:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:35:24,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 12:35:24,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:35:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:35:24,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 12:35:24,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005067536] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:35:24,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:35:24,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 12:35:24,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657645165] [2023-02-18 12:35:24,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:35:24,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 12:35:24,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:35:24,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 12:35:24,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 12:35:24,133 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:35:24,146 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2023-02-18 12:35:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 12:35:24,153 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 12:35:24,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:35:24,158 INFO L225 Difference]: With dead ends: 42 [2023-02-18 12:35:24,159 INFO L226 Difference]: Without dead ends: 19 [2023-02-18 12:35:24,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 12:35:24,164 INFO L413 NwaCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:35:24,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:35:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-18 12:35:24,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-18 12:35:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-18 12:35:24,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-02-18 12:35:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:35:24,193 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-18 12:35:24,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-18 12:35:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 12:35:24,194 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:35:24,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:35:24,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 12:35:24,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-18 12:35:24,400 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:35:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:35:24,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2023-02-18 12:35:24,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:35:24,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398182610] [2023-02-18 12:35:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:24,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:35:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:35:24,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:35:24,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398182610] [2023-02-18 12:35:24,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 12:35:24,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540838678] [2023-02-18 12:35:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:24,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:24,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:35:24,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:35:24,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 12:35:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:35:24,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 12:35:24,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:35:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:35:24,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 12:35:24,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540838678] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:35:24,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:35:24,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 12:35:24,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715867967] [2023-02-18 12:35:24,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:35:24,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 12:35:24,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:35:24,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 12:35:24,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 12:35:24,524 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:24,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:35:24,574 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-18 12:35:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 12:35:24,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 12:35:24,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:35:24,576 INFO L225 Difference]: With dead ends: 42 [2023-02-18 12:35:24,576 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 12:35:24,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 12:35:24,578 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:35:24,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:35:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 12:35:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2023-02-18 12:35:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-18 12:35:24,584 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-02-18 12:35:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:35:24,584 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-18 12:35:24,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-18 12:35:24,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 12:35:24,585 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:35:24,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:35:24,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 12:35:24,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-18 12:35:24,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:35:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:35:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2023-02-18 12:35:24,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:35:24,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94700019] [2023-02-18 12:35:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:24,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:35:24,833 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:35:24,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833684404] [2023-02-18 12:35:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:24,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:24,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:35:24,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:35:24,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 12:35:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:35:24,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 12:35:24,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:35:24,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-02-18 12:35:25,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:35:25,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 63 [2023-02-18 12:35:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:35:25,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 12:35:25,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:35:25,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94700019] [2023-02-18 12:35:25,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:35:25,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833684404] [2023-02-18 12:35:25,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833684404] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:35:25,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:35:25,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 12:35:25,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332780939] [2023-02-18 12:35:25,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:35:25,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 12:35:25,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:35:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 12:35:25,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 12:35:25,064 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:35:25,169 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-02-18 12:35:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 12:35:25,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 12:35:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:35:25,172 INFO L225 Difference]: With dead ends: 38 [2023-02-18 12:35:25,172 INFO L226 Difference]: Without dead ends: 36 [2023-02-18 12:35:25,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-02-18 12:35:25,177 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 12:35:25,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 42 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 12:35:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-18 12:35:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2023-02-18 12:35:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-18 12:35:25,192 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2023-02-18 12:35:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:35:25,193 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-18 12:35:25,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:25,193 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-18 12:35:25,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 12:35:25,194 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:35:25,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:35:25,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 12:35:25,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:25,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:35:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:35:25,401 INFO L85 PathProgramCache]: Analyzing trace with hash -217194585, now seen corresponding path program 1 times [2023-02-18 12:35:25,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:35:25,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842660554] [2023-02-18 12:35:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:35:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:35:25,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:35:25,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842660554] [2023-02-18 12:35:25,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 12:35:25,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520180089] [2023-02-18 12:35:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:25,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:35:25,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:35:25,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 12:35:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:35:25,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 12:35:25,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:35:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:35:25,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 12:35:25,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520180089] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:35:25,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:35:25,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 12:35:25,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067468716] [2023-02-18 12:35:25,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:35:25,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 12:35:25,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:35:25,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 12:35:25,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 12:35:25,517 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:35:25,571 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-02-18 12:35:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 12:35:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 12:35:25,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:35:25,574 INFO L225 Difference]: With dead ends: 55 [2023-02-18 12:35:25,575 INFO L226 Difference]: Without dead ends: 35 [2023-02-18 12:35:25,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 12:35:25,576 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:35:25,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:35:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-18 12:35:25,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-02-18 12:35:25,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-02-18 12:35:25,587 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2023-02-18 12:35:25,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:35:25,587 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-02-18 12:35:25,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:25,587 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-02-18 12:35:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 12:35:25,589 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:35:25,589 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:35:25,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 12:35:25,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:25,795 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:35:25,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:35:25,795 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2023-02-18 12:35:25,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:35:25,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714855151] [2023-02-18 12:35:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:25,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:35:25,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:35:25,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948693952] [2023-02-18 12:35:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:25,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:25,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:35:25,823 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:35:25,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 12:35:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:35:25,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 12:35:25,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:35:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:35:25,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:35:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:35:25,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:35:25,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714855151] [2023-02-18 12:35:25,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:35:25,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948693952] [2023-02-18 12:35:25,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948693952] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:35:25,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:35:25,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-18 12:35:25,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525253519] [2023-02-18 12:35:25,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:35:25,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 12:35:25,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:35:25,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 12:35:25,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-18 12:35:25,955 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:35:26,060 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2023-02-18 12:35:26,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 12:35:26,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 12:35:26,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:35:26,062 INFO L225 Difference]: With dead ends: 70 [2023-02-18 12:35:26,062 INFO L226 Difference]: Without dead ends: 43 [2023-02-18 12:35:26,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-18 12:35:26,064 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 12:35:26,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 38 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 12:35:26,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-18 12:35:26,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2023-02-18 12:35:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-02-18 12:35:26,074 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2023-02-18 12:35:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:35:26,074 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-02-18 12:35:26,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-02-18 12:35:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 12:35:26,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:35:26,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:35:26,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 12:35:26,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:26,284 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:35:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:35:26,285 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2023-02-18 12:35:26,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:35:26,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052779934] [2023-02-18 12:35:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:26,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:35:26,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:35:26,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928316035] [2023-02-18 12:35:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:26,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:26,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:35:26,307 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) [2023-02-18 12:35:26,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 12:35:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:35:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 12:35:26,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:35:26,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-02-18 12:35:26,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 52 treesize of output 45 [2023-02-18 12:35:26,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 89 [2023-02-18 12:35:26,464 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:35:26,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:35:26,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 56 [2023-02-18 12:35:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:35:26,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:35:26,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 25 [2023-02-18 12:35:26,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 23 [2023-02-18 12:35:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 12:35:26,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:35:26,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052779934] [2023-02-18 12:35:26,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:35:26,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928316035] [2023-02-18 12:35:26,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928316035] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:35:26,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:35:26,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-02-18 12:35:26,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642747791] [2023-02-18 12:35:26,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:35:26,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 12:35:26,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:35:26,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 12:35:26,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-02-18 12:35:26,661 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:35:27,172 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2023-02-18 12:35:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 12:35:27,173 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 12:35:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:35:27,173 INFO L225 Difference]: With dead ends: 112 [2023-02-18 12:35:27,174 INFO L226 Difference]: Without dead ends: 92 [2023-02-18 12:35:27,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-02-18 12:35:27,174 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 123 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 12:35:27,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 91 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 12:35:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-18 12:35:27,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2023-02-18 12:35:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:27,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-18 12:35:27,191 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2023-02-18 12:35:27,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:35:27,192 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-18 12:35:27,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-18 12:35:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 12:35:27,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:35:27,195 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:35:27,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 12:35:27,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:27,402 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:35:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:35:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2023-02-18 12:35:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:35:27,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377911201] [2023-02-18 12:35:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:27,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:35:27,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:35:27,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937191759] [2023-02-18 12:35:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:27,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:27,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:35:27,426 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) [2023-02-18 12:35:27,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 12:35:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:35:27,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 12:35:27,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:35:27,552 INFO L350 Elim1Store]: Elim1 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 [2023-02-18 12:35:27,563 INFO L350 Elim1Store]: Elim1 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 12:35:27,594 INFO L350 Elim1Store]: Elim1 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 50 treesize of output 43 [2023-02-18 12:35:27,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:27,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:27,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 87 [2023-02-18 12:35:27,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:27,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:27,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 58 treesize of output 20 [2023-02-18 12:35:27,644 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 33 [2023-02-18 12:35:27,683 INFO L350 Elim1Store]: Elim1 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 136 treesize of output 122 [2023-02-18 12:35:27,689 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:35:27,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:27,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:27,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:27,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 153 [2023-02-18 12:35:27,707 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:35:27,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:35:27,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 303 treesize of output 339 [2023-02-18 12:35:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:35:28,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:35:29,524 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:35:29,529 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:35:29,531 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:35:29,532 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:35:29,534 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:35:29,536 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:35:29,539 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:35:29,542 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:35:29,547 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:35:29,549 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:35:29,559 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:35:29,562 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:35:29,563 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:35:29,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:35:29,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:35:29,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377911201] [2023-02-18 12:35:29,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:35:29,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937191759] [2023-02-18 12:35:29,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937191759] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:35:29,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:35:29,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2023-02-18 12:35:29,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249732280] [2023-02-18 12:35:29,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:35:29,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 12:35:29,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:35:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 12:35:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=570, Unknown=1, NotChecked=0, Total=702 [2023-02-18 12:35:29,650 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:35:44,826 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2023-02-18 12:35:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-18 12:35:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-18 12:35:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:35:44,828 INFO L225 Difference]: With dead ends: 175 [2023-02-18 12:35:44,828 INFO L226 Difference]: Without dead ends: 173 [2023-02-18 12:35:44,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1110, Invalid=3719, Unknown=1, NotChecked=0, Total=4830 [2023-02-18 12:35:44,831 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 496 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-02-18 12:35:44,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 171 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-02-18 12:35:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-18 12:35:44,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 80. [2023-02-18 12:35:44,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2023-02-18 12:35:44,859 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 28 [2023-02-18 12:35:44,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:35:44,859 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2023-02-18 12:35:44,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:44,859 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2023-02-18 12:35:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 12:35:44,860 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:35:44,860 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:35:44,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 12:35:45,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:45,065 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:35:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:35:45,066 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2023-02-18 12:35:45,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:35:45,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034642064] [2023-02-18 12:35:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:45,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:35:45,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:35:45,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328143446] [2023-02-18 12:35:45,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 12:35:45,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:45,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:35:45,084 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) [2023-02-18 12:35:45,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 12:35:45,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 12:35:45,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:35:45,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 12:35:45,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:35:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 12:35:45,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:35:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 12:35:45,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:35:45,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034642064] [2023-02-18 12:35:45,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:35:45,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328143446] [2023-02-18 12:35:45,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328143446] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:35:45,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:35:45,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-18 12:35:45,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101839518] [2023-02-18 12:35:45,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:35:45,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 12:35:45,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:35:45,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 12:35:45,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-18 12:35:45,219 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:35:45,398 INFO L93 Difference]: Finished difference Result 190 states and 228 transitions. [2023-02-18 12:35:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 12:35:45,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-18 12:35:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:35:45,400 INFO L225 Difference]: With dead ends: 190 [2023-02-18 12:35:45,400 INFO L226 Difference]: Without dead ends: 122 [2023-02-18 12:35:45,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-18 12:35:45,401 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 12:35:45,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 63 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 12:35:45,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-18 12:35:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2023-02-18 12:35:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.21875) internal successors, (117), 96 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2023-02-18 12:35:45,439 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 32 [2023-02-18 12:35:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:35:45,439 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2023-02-18 12:35:45,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2023-02-18 12:35:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 12:35:45,441 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:35:45,441 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:35:45,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-18 12:35:45,647 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,SelfDestructingSolverStorable7 [2023-02-18 12:35:45,647 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:35:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:35:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash -187195163, now seen corresponding path program 2 times [2023-02-18 12:35:45,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:35:45,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459200170] [2023-02-18 12:35:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:45,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:35:45,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:35:45,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304202819] [2023-02-18 12:35:45,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 12:35:45,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:45,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:35:45,697 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) [2023-02-18 12:35:45,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 12:35:45,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 12:35:45,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:35:45,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 12:35:45,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:35:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 12:35:45,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:35:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 12:35:45,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:35:45,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459200170] [2023-02-18 12:35:45,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:35:45,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304202819] [2023-02-18 12:35:45,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304202819] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:35:45,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:35:45,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-18 12:35:45,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689327418] [2023-02-18 12:35:45,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:35:45,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 12:35:45,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:35:45,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 12:35:45,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-18 12:35:45,849 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:46,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:35:46,130 INFO L93 Difference]: Finished difference Result 236 states and 273 transitions. [2023-02-18 12:35:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 12:35:46,130 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-18 12:35:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:35:46,131 INFO L225 Difference]: With dead ends: 236 [2023-02-18 12:35:46,131 INFO L226 Difference]: Without dead ends: 177 [2023-02-18 12:35:46,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-02-18 12:35:46,133 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 12:35:46,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 101 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 12:35:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-18 12:35:46,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2023-02-18 12:35:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1879699248120301) internal successors, (158), 133 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2023-02-18 12:35:46,179 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 36 [2023-02-18 12:35:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:35:46,179 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2023-02-18 12:35:46,180 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:46,180 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2023-02-18 12:35:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 12:35:46,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:35:46,181 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:35:46,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 12:35:46,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:46,387 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:35:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:35:46,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1173959464, now seen corresponding path program 3 times [2023-02-18 12:35:46,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:35:46,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423279973] [2023-02-18 12:35:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:46,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:35:46,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:35:46,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760846438] [2023-02-18 12:35:46,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 12:35:46,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:46,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:35:46,413 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) [2023-02-18 12:35:46,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 12:35:46,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 12:35:46,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:35:46,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 12:35:46,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:35:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 12:35:46,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:35:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 12:35:46,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:35:46,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423279973] [2023-02-18 12:35:46,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:35:46,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760846438] [2023-02-18 12:35:46,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760846438] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:35:46,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:35:46,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-02-18 12:35:46,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943025713] [2023-02-18 12:35:46,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:35:46,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 12:35:46,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:35:46,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 12:35:46,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-02-18 12:35:46,689 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:35:47,068 INFO L93 Difference]: Finished difference Result 171 states and 193 transitions. [2023-02-18 12:35:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 12:35:47,069 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-18 12:35:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:35:47,070 INFO L225 Difference]: With dead ends: 171 [2023-02-18 12:35:47,070 INFO L226 Difference]: Without dead ends: 162 [2023-02-18 12:35:47,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 12:35:47,071 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 135 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 12:35:47,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 94 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 12:35:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-18 12:35:47,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2023-02-18 12:35:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 133 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2023-02-18 12:35:47,116 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 37 [2023-02-18 12:35:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:35:47,116 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2023-02-18 12:35:47,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:35:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2023-02-18 12:35:47,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 12:35:47,117 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:35:47,118 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:35:47,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 12:35:47,323 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,SelfDestructingSolverStorable9 [2023-02-18 12:35:47,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:35:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:35:47,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 4 times [2023-02-18 12:35:47,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:35:47,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517490573] [2023-02-18 12:35:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:35:47,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:35:47,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:35:47,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398383027] [2023-02-18 12:35:47,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 12:35:47,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:35:47,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:35:47,354 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) [2023-02-18 12:35:47,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 12:35:47,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 12:35:47,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:35:47,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-18 12:35:47,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:35:47,555 INFO L350 Elim1Store]: Elim1 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 [2023-02-18 12:35:47,560 INFO L350 Elim1Store]: Elim1 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 12:35:47,573 INFO L350 Elim1Store]: Elim1 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 112 treesize of output 101 [2023-02-18 12:35:47,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:47,577 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:35:47,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:47,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:47,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:47,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 177 [2023-02-18 12:35:47,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:47,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 118 [2023-02-18 12:35:47,645 INFO L350 Elim1Store]: Elim1 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 236 treesize of output 205 [2023-02-18 12:35:47,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 233 [2023-02-18 12:35:47,660 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:35:47,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 148 [2023-02-18 12:35:47,769 INFO L350 Elim1Store]: Elim1 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 353 treesize of output 313 [2023-02-18 12:35:47,774 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:35:47,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:47,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:47,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:35:47,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 209 [2023-02-18 12:35:47,784 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:35:47,901 INFO L350 Elim1Store]: Elim1 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 421 treesize of output 367 [2023-02-18 12:35:47,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 255 [2023-02-18 12:35:47,916 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:35:49,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:35:49,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 150 select indices, 150 select index equivalence classes, 15 disjoint index pairs (out of 11175 index pairs), introduced 150 new quantified variables, introduced 11175 case distinctions, treesize of input 4493 treesize of output 18763