./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum40.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/reducercommutativity/rangesum40.i -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 a418834dbd1069728d4982a06f4275da717a1d93e3d5061fbbc21c5c3a319ddf --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:03:09,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:03:09,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:03:09,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:03:09,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:03:09,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:03:09,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:03:09,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:03:09,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:03:09,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:03:09,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:03:09,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:03:09,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:03:09,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:03:09,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:03:09,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:03:09,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:03:09,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:03:09,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:03:09,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:03:09,108 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:03:09,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:03:09,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:03:09,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:03:09,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:03:09,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:03:09,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:03:09,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:03:09,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:03:09,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:03:09,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:03:09,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:03:09,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:03:09,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:03:09,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:03:09,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:03:09,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:03:09,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:03:09,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:03:09,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:03:09,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:03:09,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:03:09,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:03:09,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:03:09,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:03:09,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:03:09,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:03:09,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:03:09,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:03:09,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:03:09,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:03:09,165 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:03:09,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:03:09,167 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:03:09,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:03:09,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:03:09,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:03:09,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:03:09,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:03:09,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:03:09,168 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:03:09,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:03:09,169 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:03:09,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:03:09,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:03:09,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:03:09,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:03:09,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:03:09,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:03:09,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:03:09,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:03:09,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:03:09,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:03:09,172 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:03:09,172 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:03:09,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:03:09,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a418834dbd1069728d4982a06f4275da717a1d93e3d5061fbbc21c5c3a319ddf [2022-07-20 21:03:09,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:03:09,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:03:09,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:03:09,434 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:03:09,435 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:03:09,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum40.i [2022-07-20 21:03:09,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fbf7a3a6/ee899f922e824c569ce39be2d7b936a6/FLAG2f8790046 [2022-07-20 21:03:09,914 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:03:09,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum40.i [2022-07-20 21:03:09,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fbf7a3a6/ee899f922e824c569ce39be2d7b936a6/FLAG2f8790046 [2022-07-20 21:03:10,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fbf7a3a6/ee899f922e824c569ce39be2d7b936a6 [2022-07-20 21:03:10,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:03:10,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:03:10,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:03:10,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:03:10,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:03:10,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:03:10" (1/1) ... [2022-07-20 21:03:10,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dab357c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10, skipping insertion in model container [2022-07-20 21:03:10,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:03:10" (1/1) ... [2022-07-20 21:03:10,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:03:10,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:03:10,547 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum40.i[1465,1478] [2022-07-20 21:03:10,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:03:10,566 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:03:10,583 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum40.i[1465,1478] [2022-07-20 21:03:10,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:03:10,593 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:03:10,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10 WrapperNode [2022-07-20 21:03:10,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:03:10,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:03:10,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:03:10,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:03:10,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10" (1/1) ... [2022-07-20 21:03:10,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10" (1/1) ... [2022-07-20 21:03:10,623 INFO L137 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-07-20 21:03:10,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:03:10,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:03:10,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:03:10,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:03:10,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10" (1/1) ... [2022-07-20 21:03:10,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10" (1/1) ... [2022-07-20 21:03:10,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10" (1/1) ... [2022-07-20 21:03:10,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10" (1/1) ... [2022-07-20 21:03:10,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10" (1/1) ... [2022-07-20 21:03:10,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10" (1/1) ... [2022-07-20 21:03:10,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10" (1/1) ... [2022-07-20 21:03:10,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:03:10,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:03:10,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:03:10,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:03:10,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10" (1/1) ... [2022-07-20 21:03:10,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:03:10,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:10,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 21:03:10,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 21:03:10,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:03:10,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:03:10,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:03:10,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:03:10,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:03:10,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:03:10,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:03:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2022-07-20 21:03:10,760 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2022-07-20 21:03:10,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:03:10,841 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:03:10,843 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:03:10,987 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:03:10,993 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:03:10,994 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 21:03:10,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:03:10 BoogieIcfgContainer [2022-07-20 21:03:10,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:03:10,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:03:10,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:03:11,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:03:11,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:03:10" (1/3) ... [2022-07-20 21:03:11,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12016b88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:03:11, skipping insertion in model container [2022-07-20 21:03:11,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:10" (2/3) ... [2022-07-20 21:03:11,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12016b88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:03:11, skipping insertion in model container [2022-07-20 21:03:11,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:03:10" (3/3) ... [2022-07-20 21:03:11,003 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum40.i [2022-07-20 21:03:11,017 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:03:11,018 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:03:11,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:03:11,069 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3ae4ceb7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@401c366c [2022-07-20 21:03:11,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:03:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 21:03:11,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:11,082 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:11,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:11,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:11,088 INFO L85 PathProgramCache]: Analyzing trace with hash -275565944, now seen corresponding path program 1 times [2022-07-20 21:03:11,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:11,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627012739] [2022-07-20 21:03:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:11,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:11,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-20 21:03:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:11,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 21:03:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:11,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 21:03:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:03:11,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:11,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627012739] [2022-07-20 21:03:11,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627012739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:03:11,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:03:11,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:03:11,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063056726] [2022-07-20 21:03:11,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:03:11,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:03:11,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:11,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:03:11,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:03:11,304 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:03:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:11,353 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-07-20 21:03:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:03:11,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-07-20 21:03:11,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:11,364 INFO L225 Difference]: With dead ends: 54 [2022-07-20 21:03:11,364 INFO L226 Difference]: Without dead ends: 26 [2022-07-20 21:03:11,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:03:11,375 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:11,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:11,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-20 21:03:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-07-20 21:03:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-07-20 21:03:11,417 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 29 [2022-07-20 21:03:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:11,418 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-20 21:03:11,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:03:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-07-20 21:03:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 21:03:11,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:11,423 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:11,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:03:11,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:11,429 INFO L85 PathProgramCache]: Analyzing trace with hash -653100523, now seen corresponding path program 1 times [2022-07-20 21:03:11,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:11,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707248595] [2022-07-20 21:03:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:11,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:11,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-20 21:03:11,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:11,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707248595] [2022-07-20 21:03:11,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-20 21:03:11,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665831126] [2022-07-20 21:03:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:11,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:11,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:11,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:11,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:03:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:03:11,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:03:11,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:03:11,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665831126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:03:11,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:03:11,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:03:11,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555474363] [2022-07-20 21:03:11,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:03:11,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:03:11,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:11,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:03:11,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:03:11,686 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:03:11,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:11,710 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-07-20 21:03:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:03:11,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-07-20 21:03:11,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:11,712 INFO L225 Difference]: With dead ends: 46 [2022-07-20 21:03:11,713 INFO L226 Difference]: Without dead ends: 28 [2022-07-20 21:03:11,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:03:11,718 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:11,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-20 21:03:11,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-07-20 21:03:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-20 21:03:11,726 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 31 [2022-07-20 21:03:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:11,727 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-20 21:03:11,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:03:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-20 21:03:11,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 21:03:11,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:11,730 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:11,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:11,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:11,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:11,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1081404920, now seen corresponding path program 1 times [2022-07-20 21:03:11,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:11,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060205584] [2022-07-20 21:03:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:11,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:12,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-20 21:03:12,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060205584] [2022-07-20 21:03:12,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-20 21:03:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961292707] [2022-07-20 21:03:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:12,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:12,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:12,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:12,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:03:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:12,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:03:12,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 21:03:12,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:03:12,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961292707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:03:12,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:03:12,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:03:12,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562648616] [2022-07-20 21:03:12,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:03:12,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:03:12,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:12,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:03:12,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:03:12,106 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:03:12,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:12,117 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-07-20 21:03:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:03:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-07-20 21:03:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:12,118 INFO L225 Difference]: With dead ends: 44 [2022-07-20 21:03:12,118 INFO L226 Difference]: Without dead ends: 29 [2022-07-20 21:03:12,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:03:12,120 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:12,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-20 21:03:12,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-20 21:03:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-20 21:03:12,125 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 40 [2022-07-20 21:03:12,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:12,127 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-20 21:03:12,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:03:12,127 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-20 21:03:12,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:03:12,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:12,128 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:12,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:12,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-20 21:03:12,349 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:12,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:12,350 INFO L85 PathProgramCache]: Analyzing trace with hash -673301430, now seen corresponding path program 1 times [2022-07-20 21:03:12,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:12,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126599419] [2022-07-20 21:03:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:12,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:12,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-20 21:03:12,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:12,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126599419] [2022-07-20 21:03:12,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-20 21:03:12,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456195355] [2022-07-20 21:03:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:12,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:12,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:12,390 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:12,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:03:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:12,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:03:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 21:03:12,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:03:12,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456195355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:03:12,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:03:12,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:03:12,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670050363] [2022-07-20 21:03:12,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:03:12,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:03:12,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:03:12,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:03:12,508 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:03:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:12,523 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2022-07-20 21:03:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:03:12,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-07-20 21:03:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:12,527 INFO L225 Difference]: With dead ends: 55 [2022-07-20 21:03:12,528 INFO L226 Difference]: Without dead ends: 34 [2022-07-20 21:03:12,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:03:12,530 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:12,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:12,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-20 21:03:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-07-20 21:03:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-07-20 21:03:12,538 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 42 [2022-07-20 21:03:12,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:12,539 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-07-20 21:03:12,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:03:12,539 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-07-20 21:03:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:03:12,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:12,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:12,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:12,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:12,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:12,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1042180377, now seen corresponding path program 1 times [2022-07-20 21:03:12,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:12,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144723429] [2022-07-20 21:03:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:12,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:12,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-20 21:03:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:12,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:03:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:12,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-20 21:03:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:03:12,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:12,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144723429] [2022-07-20 21:03:12,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144723429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:03:12,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655309122] [2022-07-20 21:03:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:12,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:12,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:12,838 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:12,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:03:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:12,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:03:12,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:03:12,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:03:12,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655309122] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:12,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:03:12,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-20 21:03:12,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606232403] [2022-07-20 21:03:12,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:12,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 21:03:12,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:12,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 21:03:12,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:03:12,967 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:03:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:13,008 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2022-07-20 21:03:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 21:03:13,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2022-07-20 21:03:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:13,009 INFO L225 Difference]: With dead ends: 69 [2022-07-20 21:03:13,010 INFO L226 Difference]: Without dead ends: 42 [2022-07-20 21:03:13,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:03:13,011 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:13,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 138 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-20 21:03:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-07-20 21:03:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-07-20 21:03:13,017 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2022-07-20 21:03:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:13,017 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-07-20 21:03:13,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:03:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-07-20 21:03:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 21:03:13,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:13,019 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:13,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:13,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:13,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:13,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:13,245 INFO L85 PathProgramCache]: Analyzing trace with hash -604386836, now seen corresponding path program 2 times [2022-07-20 21:03:13,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:13,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379052294] [2022-07-20 21:03:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:13,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:13,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 21:03:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:13,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-20 21:03:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:13,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-20 21:03:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-20 21:03:13,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:13,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379052294] [2022-07-20 21:03:13,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379052294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:03:13,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694316938] [2022-07-20 21:03:13,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:03:13,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:13,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:13,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:03:13,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:03:13,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:03:13,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:03:13,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-20 21:03:13,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-20 21:03:13,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694316938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:13,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:03:13,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-20 21:03:13,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252971149] [2022-07-20 21:03:13,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:13,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:03:13,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:13,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:03:13,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:03:13,585 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-20 21:03:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:13,657 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2022-07-20 21:03:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:03:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2022-07-20 21:03:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:13,663 INFO L225 Difference]: With dead ends: 86 [2022-07-20 21:03:13,663 INFO L226 Difference]: Without dead ends: 56 [2022-07-20 21:03:13,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:03:13,665 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:13,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 112 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-20 21:03:13,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-07-20 21:03:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-07-20 21:03:13,673 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 57 [2022-07-20 21:03:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:13,674 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-07-20 21:03:13,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-20 21:03:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-07-20 21:03:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-20 21:03:13,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:13,675 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:13,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:13,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:13,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:13,902 INFO L85 PathProgramCache]: Analyzing trace with hash 948362870, now seen corresponding path program 1 times [2022-07-20 21:03:13,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:13,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475652187] [2022-07-20 21:03:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:13,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:13,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:03:13,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128097050] [2022-07-20 21:03:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:13,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:13,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:13,928 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:13,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:03:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:14,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:03:14,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-20 21:03:14,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-20 21:03:14,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:14,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475652187] [2022-07-20 21:03:14,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:03:14,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128097050] [2022-07-20 21:03:14,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128097050] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:14,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:03:14,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-20 21:03:14,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095626127] [2022-07-20 21:03:14,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:14,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:03:14,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:03:14,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:03:14,376 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:03:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:14,475 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-07-20 21:03:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:03:14,476 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 78 [2022-07-20 21:03:14,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:14,480 INFO L225 Difference]: With dead ends: 103 [2022-07-20 21:03:14,480 INFO L226 Difference]: Without dead ends: 75 [2022-07-20 21:03:14,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:03:14,482 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:14,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 236 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:03:14,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-20 21:03:14,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-07-20 21:03:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:14,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2022-07-20 21:03:14,491 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 78 [2022-07-20 21:03:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:14,491 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2022-07-20 21:03:14,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:03:14,492 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2022-07-20 21:03:14,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-20 21:03:14,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:14,494 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:14,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:14,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:14,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:14,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:14,708 INFO L85 PathProgramCache]: Analyzing trace with hash 468172686, now seen corresponding path program 2 times [2022-07-20 21:03:14,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:14,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429741649] [2022-07-20 21:03:14,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:14,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:14,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:03:14,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760697723] [2022-07-20 21:03:14,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:03:14,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:14,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:14,780 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:14,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:03:14,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:03:14,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:03:14,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 21:03:14,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-20 21:03:15,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-20 21:03:15,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429741649] [2022-07-20 21:03:15,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:03:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760697723] [2022-07-20 21:03:15,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760697723] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:15,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:03:15,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 42 [2022-07-20 21:03:15,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891798278] [2022-07-20 21:03:15,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:15,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 21:03:15,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:15,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 21:03:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 21:03:15,764 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 42 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 42 states have internal predecessors, (109), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:03:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:15,874 INFO L93 Difference]: Finished difference Result 139 states and 168 transitions. [2022-07-20 21:03:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 21:03:15,874 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 42 states have internal predecessors, (109), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 102 [2022-07-20 21:03:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:15,875 INFO L225 Difference]: With dead ends: 139 [2022-07-20 21:03:15,876 INFO L226 Difference]: Without dead ends: 111 [2022-07-20 21:03:15,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 21:03:15,877 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:15,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 106 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:03:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-20 21:03:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-07-20 21:03:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2022-07-20 21:03:15,886 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 102 [2022-07-20 21:03:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:15,887 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2022-07-20 21:03:15,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 42 states have internal predecessors, (109), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:03:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2022-07-20 21:03:15,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-07-20 21:03:15,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:15,889 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:15,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:16,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:16,116 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:16,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1859225038, now seen corresponding path program 3 times [2022-07-20 21:03:16,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:16,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079428677] [2022-07-20 21:03:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:16,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:03:16,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946374351] [2022-07-20 21:03:16,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:03:16,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:16,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:16,169 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:16,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:03:16,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:03:16,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:03:16,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:03:16,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 1674 trivial. 0 not checked. [2022-07-20 21:03:16,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2022-07-20 21:03:16,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:16,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079428677] [2022-07-20 21:03:16,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:03:16,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946374351] [2022-07-20 21:03:16,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946374351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:16,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:03:16,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-20 21:03:16,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126698246] [2022-07-20 21:03:16,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:16,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 21:03:16,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 21:03:16,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-20 21:03:16,316 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:03:16,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:16,333 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2022-07-20 21:03:16,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 21:03:16,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 138 [2022-07-20 21:03:16,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:16,337 INFO L225 Difference]: With dead ends: 137 [2022-07-20 21:03:16,337 INFO L226 Difference]: Without dead ends: 117 [2022-07-20 21:03:16,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-20 21:03:16,338 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:16,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 78 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:16,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-20 21:03:16,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-07-20 21:03:16,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0446428571428572) internal successors, (117), 112 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2022-07-20 21:03:16,348 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 138 [2022-07-20 21:03:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:16,348 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2022-07-20 21:03:16,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:03:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2022-07-20 21:03:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-20 21:03:16,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:16,350 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:16,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:16,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-20 21:03:16,578 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:16,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:16,578 INFO L85 PathProgramCache]: Analyzing trace with hash 424610296, now seen corresponding path program 4 times [2022-07-20 21:03:16,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:16,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046479054] [2022-07-20 21:03:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:16,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:16,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:03:16,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711813423] [2022-07-20 21:03:16,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:03:16,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:16,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:16,668 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:16,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:03:16,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:03:16,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:03:16,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:03:16,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2022-07-20 21:03:16,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2022-07-20 21:03:16,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:16,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046479054] [2022-07-20 21:03:16,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:03:16,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711813423] [2022-07-20 21:03:16,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711813423] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:16,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:03:16,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-20 21:03:16,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717053700] [2022-07-20 21:03:16,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:16,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 21:03:16,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:16,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 21:03:16,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:03:16,907 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:03:16,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:16,933 INFO L93 Difference]: Finished difference Result 161 states and 178 transitions. [2022-07-20 21:03:16,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 21:03:16,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 144 [2022-07-20 21:03:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:16,934 INFO L225 Difference]: With dead ends: 161 [2022-07-20 21:03:16,935 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 21:03:16,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:03:16,936 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:16,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:16,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 21:03:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-20 21:03:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0403225806451613) internal successors, (129), 124 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2022-07-20 21:03:16,961 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 144 [2022-07-20 21:03:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:16,962 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2022-07-20 21:03:16,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:03:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2022-07-20 21:03:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-20 21:03:16,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:16,965 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 21, 21, 18, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:16,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-20 21:03:17,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 21:03:17,179 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:17,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2049059016, now seen corresponding path program 5 times [2022-07-20 21:03:17,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:17,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407149314] [2022-07-20 21:03:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:17,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:17,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:03:17,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704359245] [2022-07-20 21:03:17,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:03:17,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:17,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:17,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:17,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:03:18,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-07-20 21:03:18,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:03:18,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 21:03:18,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 363 proven. 7 refuted. 0 times theorem prover too weak. 1954 trivial. 0 not checked. [2022-07-20 21:03:18,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 37 proven. 131 refuted. 0 times theorem prover too weak. 2156 trivial. 0 not checked. [2022-07-20 21:03:18,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:18,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407149314] [2022-07-20 21:03:18,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:03:18,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704359245] [2022-07-20 21:03:18,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704359245] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:18,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:03:18,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-20 21:03:18,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389856094] [2022-07-20 21:03:18,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:18,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 21:03:18,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:18,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 21:03:18,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-07-20 21:03:18,264 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:03:18,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:18,315 INFO L93 Difference]: Finished difference Result 191 states and 216 transitions. [2022-07-20 21:03:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 21:03:18,315 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 180 [2022-07-20 21:03:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:18,319 INFO L225 Difference]: With dead ends: 191 [2022-07-20 21:03:18,319 INFO L226 Difference]: Without dead ends: 147 [2022-07-20 21:03:18,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-07-20 21:03:18,320 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:18,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 98 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-20 21:03:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-07-20 21:03:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0774647887323943) internal successors, (153), 142 states have internal predecessors, (153), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2022-07-20 21:03:18,339 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 180 [2022-07-20 21:03:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:18,339 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2022-07-20 21:03:18,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:03:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2022-07-20 21:03:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-20 21:03:18,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:18,342 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 21, 18, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:18,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:18,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 21:03:18,567 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:18,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1548876328, now seen corresponding path program 6 times [2022-07-20 21:03:18,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:18,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310905148] [2022-07-20 21:03:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:18,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:03:18,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764488600] [2022-07-20 21:03:18,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:03:18,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:18,621 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:18,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:03:18,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-20 21:03:18,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:03:18,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:03:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 1076 proven. 16 refuted. 0 times theorem prover too weak. 2879 trivial. 0 not checked. [2022-07-20 21:03:18,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3955 trivial. 0 not checked. [2022-07-20 21:03:19,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:19,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310905148] [2022-07-20 21:03:19,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:03:19,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764488600] [2022-07-20 21:03:19,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764488600] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:19,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:03:19,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-20 21:03:19,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742544083] [2022-07-20 21:03:19,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:19,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 21:03:19,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:19,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 21:03:19,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:03:19,050 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:03:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:19,083 INFO L93 Difference]: Finished difference Result 209 states and 235 transitions. [2022-07-20 21:03:19,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 21:03:19,083 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 234 [2022-07-20 21:03:19,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:19,084 INFO L225 Difference]: With dead ends: 209 [2022-07-20 21:03:19,085 INFO L226 Difference]: Without dead ends: 159 [2022-07-20 21:03:19,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:03:19,086 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:19,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 103 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-20 21:03:19,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-07-20 21:03:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0714285714285714) internal successors, (165), 154 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 171 transitions. [2022-07-20 21:03:19,094 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 171 transitions. Word has length 234 [2022-07-20 21:03:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:19,095 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 171 transitions. [2022-07-20 21:03:19,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:03:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 171 transitions. [2022-07-20 21:03:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-07-20 21:03:19,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:19,097 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 21, 18, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:19,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:19,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 21:03:19,311 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:19,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2096659740, now seen corresponding path program 7 times [2022-07-20 21:03:19,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:19,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192857453] [2022-07-20 21:03:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:19,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:19,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:03:19,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359001511] [2022-07-20 21:03:19,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:03:19,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:19,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:19,355 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:19,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:03:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:19,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:03:19,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 669 proven. 57 refuted. 0 times theorem prover too weak. 3329 trivial. 0 not checked. [2022-07-20 21:03:19,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 133 proven. 1131 refuted. 0 times theorem prover too weak. 2791 trivial. 0 not checked. [2022-07-20 21:03:19,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:19,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192857453] [2022-07-20 21:03:19,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:03:19,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359001511] [2022-07-20 21:03:19,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359001511] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:19,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:03:19,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-20 21:03:19,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576752857] [2022-07-20 21:03:19,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:19,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 21:03:19,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:19,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 21:03:19,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:03:19,770 INFO L87 Difference]: Start difference. First operand 159 states and 171 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:03:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:19,831 INFO L93 Difference]: Finished difference Result 257 states and 290 transitions. [2022-07-20 21:03:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 21:03:19,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 246 [2022-07-20 21:03:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:19,833 INFO L225 Difference]: With dead ends: 257 [2022-07-20 21:03:19,833 INFO L226 Difference]: Without dead ends: 183 [2022-07-20 21:03:19,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:03:19,834 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:19,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 75 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:19,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-20 21:03:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-07-20 21:03:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0617977528089888) internal successors, (189), 178 states have internal predecessors, (189), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 195 transitions. [2022-07-20 21:03:19,841 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 195 transitions. Word has length 246 [2022-07-20 21:03:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:19,841 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 195 transitions. [2022-07-20 21:03:19,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:03:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 195 transitions. [2022-07-20 21:03:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-07-20 21:03:19,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:19,845 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 42, 40, 40, 21, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:19,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-20 21:03:20,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 21:03:20,072 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:20,072 INFO L85 PathProgramCache]: Analyzing trace with hash -76793500, now seen corresponding path program 8 times [2022-07-20 21:03:20,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:20,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559466224] [2022-07-20 21:03:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:20,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:20,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:03:20,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917286465] [2022-07-20 21:03:20,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:03:20,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:20,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:20,115 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:20,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:03:20,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:03:20,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:03:20,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 21:03:20,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7763 backedges. 2173 proven. 301 refuted. 0 times theorem prover too weak. 5289 trivial. 0 not checked. [2022-07-20 21:03:20,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7763 backedges. 293 proven. 3039 refuted. 0 times theorem prover too weak. 4431 trivial. 0 not checked. [2022-07-20 21:03:20,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:20,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559466224] [2022-07-20 21:03:20,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:03:20,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917286465] [2022-07-20 21:03:20,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917286465] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:20,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:03:20,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2022-07-20 21:03:20,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278192755] [2022-07-20 21:03:20,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:20,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:03:20,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:20,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:03:20,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:03:20,720 INFO L87 Difference]: Start difference. First operand 183 states and 195 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:03:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:20,786 INFO L93 Difference]: Finished difference Result 302 states and 334 transitions. [2022-07-20 21:03:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 21:03:20,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 318 [2022-07-20 21:03:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:20,788 INFO L225 Difference]: With dead ends: 302 [2022-07-20 21:03:20,788 INFO L226 Difference]: Without dead ends: 204 [2022-07-20 21:03:20,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:03:20,789 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:20,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 75 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:03:20,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-20 21:03:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-07-20 21:03:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0552763819095476) internal successors, (210), 199 states have internal predecessors, (210), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 216 transitions. [2022-07-20 21:03:20,797 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 216 transitions. Word has length 318 [2022-07-20 21:03:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:20,797 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 216 transitions. [2022-07-20 21:03:20,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:03:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 216 transitions. [2022-07-20 21:03:20,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-07-20 21:03:20,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:20,802 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 63, 40, 40, 21, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:20,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:21,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-20 21:03:21,019 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1712152015, now seen corresponding path program 9 times [2022-07-20 21:03:21,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:21,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140575391] [2022-07-20 21:03:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:21,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:21,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:03:21,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228279374] [2022-07-20 21:03:21,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:03:21,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:21,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:21,064 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:21,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:03:21,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-20 21:03:21,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:03:21,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:03:21,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12425 backedges. 4826 proven. 100 refuted. 0 times theorem prover too weak. 7499 trivial. 0 not checked. [2022-07-20 21:03:21,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12425 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 12325 trivial. 0 not checked. [2022-07-20 21:03:22,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:22,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140575391] [2022-07-20 21:03:22,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:03:22,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228279374] [2022-07-20 21:03:22,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228279374] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:22,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:03:22,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-20 21:03:22,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417355147] [2022-07-20 21:03:22,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:22,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:03:22,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:22,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:03:22,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:03:22,092 INFO L87 Difference]: Start difference. First operand 204 states and 216 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:03:22,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:22,154 INFO L93 Difference]: Finished difference Result 323 states and 355 transitions. [2022-07-20 21:03:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:03:22,155 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 381 [2022-07-20 21:03:22,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:22,156 INFO L225 Difference]: With dead ends: 323 [2022-07-20 21:03:22,156 INFO L226 Difference]: Without dead ends: 228 [2022-07-20 21:03:22,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 738 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:03:22,158 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:22,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 103 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:22,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-20 21:03:22,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-07-20 21:03:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0493273542600896) internal successors, (234), 223 states have internal predecessors, (234), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 240 transitions. [2022-07-20 21:03:22,166 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 240 transitions. Word has length 381 [2022-07-20 21:03:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:22,166 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 240 transitions. [2022-07-20 21:03:22,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:03:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 240 transitions. [2022-07-20 21:03:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-07-20 21:03:22,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:22,169 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 63, 40, 40, 22, 22, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:22,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:22,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:22,383 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:22,384 INFO L85 PathProgramCache]: Analyzing trace with hash 403974425, now seen corresponding path program 10 times [2022-07-20 21:03:22,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:22,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545035216] [2022-07-20 21:03:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:22,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:22,427 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:03:22,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074560531] [2022-07-20 21:03:22,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:03:22,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:22,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:22,429 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:22,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:03:22,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:03:22,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:03:22,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 21:03:22,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12809 backedges. 7235 proven. 1162 refuted. 0 times theorem prover too weak. 4412 trivial. 0 not checked. [2022-07-20 21:03:23,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12809 backedges. 2412 proven. 3574 refuted. 0 times theorem prover too weak. 6823 trivial. 0 not checked. [2022-07-20 21:03:23,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:23,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545035216] [2022-07-20 21:03:23,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:03:23,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074560531] [2022-07-20 21:03:23,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074560531] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:23,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:03:23,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 42 [2022-07-20 21:03:23,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996500566] [2022-07-20 21:03:23,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:23,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 21:03:23,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:23,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 21:03:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 21:03:23,599 INFO L87 Difference]: Start difference. First operand 228 states and 240 transitions. Second operand has 42 states, 42 states have (on average 3.7857142857142856) internal successors, (159), 42 states have internal predecessors, (159), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:03:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:23,774 INFO L93 Difference]: Finished difference Result 407 states and 456 transitions. [2022-07-20 21:03:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 21:03:23,775 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.7857142857142856) internal successors, (159), 42 states have internal predecessors, (159), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 405 [2022-07-20 21:03:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:23,776 INFO L225 Difference]: With dead ends: 407 [2022-07-20 21:03:23,777 INFO L226 Difference]: Without dead ends: 264 [2022-07-20 21:03:23,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 767 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 21:03:23,778 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 177 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:23,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 74 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:03:23,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-20 21:03:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-07-20 21:03:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0888030888030888) internal successors, (282), 259 states have internal predecessors, (282), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 288 transitions. [2022-07-20 21:03:23,787 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 288 transitions. Word has length 405 [2022-07-20 21:03:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:23,787 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 288 transitions. [2022-07-20 21:03:23,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.7857142857142856) internal successors, (159), 42 states have internal predecessors, (159), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:03:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 288 transitions. [2022-07-20 21:03:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-07-20 21:03:23,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:23,808 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 63, 57, 40, 40, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:23,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:24,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-20 21:03:24,036 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:24,036 INFO L85 PathProgramCache]: Analyzing trace with hash -121582631, now seen corresponding path program 11 times [2022-07-20 21:03:24,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:24,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804077439] [2022-07-20 21:03:24,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:24,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:24,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:03:24,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981299751] [2022-07-20 21:03:24,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:03:24,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:24,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:24,127 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:24,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process