./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/sep.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 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:22:03,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:22:03,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:22:03,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:22:03,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:22:03,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:22:03,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:22:03,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:22:03,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:22:03,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:22:03,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:22:03,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:22:03,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:22:03,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:22:03,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:22:03,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:22:03,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:22:03,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:22:03,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:22:03,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:22:03,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:22:03,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:22:03,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:22:03,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:22:03,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:22:03,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:22:03,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:22:03,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:22:03,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:22:03,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:22:03,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:22:03,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:22:03,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:22:03,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:22:03,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:22:03,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:22:03,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:22:03,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:22:03,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:22:03,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:22:03,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:22:03,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 18:22:03,226 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:22:03,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:22:03,226 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:22:03,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:22:03,227 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:22:03,227 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:22:03,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:22:03,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:22:03,228 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:22:03,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:22:03,229 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:22:03,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 18:22:03,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:22:03,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:22:03,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:22:03,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:22:03,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:22:03,230 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:22:03,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:22:03,230 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:22:03,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:22:03,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:22:03,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:22:03,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:22:03,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:22:03,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:22:03,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:22:03,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:22:03,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 18:22:03,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 18:22:03,232 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:22:03,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:22:03,232 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:22:03,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:22:03,232 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:22:03,232 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2023-02-15 18:22:03,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:22:03,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:22:03,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:22:03,448 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:22:03,448 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:22:03,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep.i [2023-02-15 18:22:04,369 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:22:04,530 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:22:04,530 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i [2023-02-15 18:22:04,535 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c11e58d99/0e654fca18844a80a276f38997496a95/FLAG2e7748020 [2023-02-15 18:22:04,550 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c11e58d99/0e654fca18844a80a276f38997496a95 [2023-02-15 18:22:04,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:22:04,553 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:22:04,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:22:04,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:22:04,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:22:04,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b5fc7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04, skipping insertion in model container [2023-02-15 18:22:04,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:22:04,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:22:04,713 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2023-02-15 18:22:04,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:22:04,720 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:22:04,733 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2023-02-15 18:22:04,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:22:04,742 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:22:04,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04 WrapperNode [2023-02-15 18:22:04,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:22:04,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:22:04,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:22:04,743 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:22:04,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,762 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2023-02-15 18:22:04,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:22:04,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:22:04,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:22:04,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:22:04,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,775 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:22:04,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:22:04,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:22:04,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:22:04,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:22:04,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:04,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 18:22:04,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 18:22:04,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:22:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 18:22:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 18:22:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 18:22:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:22:04,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:22:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 18:22:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 18:22:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-02-15 18:22:04,827 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-02-15 18:22:04,888 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:22:04,889 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:22:05,025 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:22:05,030 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:22:05,030 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 18:22:05,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:22:05 BoogieIcfgContainer [2023-02-15 18:22:05,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:22:05,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:22:05,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:22:05,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:22:05,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:22:04" (1/3) ... [2023-02-15 18:22:05,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d95fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:22:05, skipping insertion in model container [2023-02-15 18:22:05,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04" (2/3) ... [2023-02-15 18:22:05,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d95fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:22:05, skipping insertion in model container [2023-02-15 18:22:05,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:22:05" (3/3) ... [2023-02-15 18:22:05,037 INFO L112 eAbstractionObserver]: Analyzing ICFG sep.i [2023-02-15 18:22:05,047 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:22:05,048 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:22:05,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:22:05,080 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f63793b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:22:05,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:22:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 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) [2023-02-15 18:22:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 18:22:05,091 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:05,092 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] [2023-02-15 18:22:05,093 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:05,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1158480486, now seen corresponding path program 1 times [2023-02-15 18:22:05,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:05,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060158259] [2023-02-15 18:22:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:05,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:05,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 18:22:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:05,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 18:22:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:05,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 18:22:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 18:22:05,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:05,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060158259] [2023-02-15 18:22:05,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060158259] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:05,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465931205] [2023-02-15 18:22:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:05,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:05,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:05,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:05,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 18:22:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:05,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 18:22:05,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 18:22:05,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:22:05,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465931205] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:05,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:22:05,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2023-02-15 18:22:05,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678643282] [2023-02-15 18:22:05,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:05,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 18:22:05,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:05,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 18:22:05,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:22:05,494 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 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 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2023-02-15 18:22:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:05,506 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2023-02-15 18:22:05,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 18:22:05,507 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 28 [2023-02-15 18:22:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:05,511 INFO L225 Difference]: With dead ends: 50 [2023-02-15 18:22:05,511 INFO L226 Difference]: Without dead ends: 22 [2023-02-15 18:22:05,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:22:05,515 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:05,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:05,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-15 18:22:05,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-15 18:22:05,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2023-02-15 18:22:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-02-15 18:22:05,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-02-15 18:22:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:05,538 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-02-15 18:22:05,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2023-02-15 18:22:05,538 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-02-15 18:22:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 18:22:05,539 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:05,539 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] [2023-02-15 18:22:05,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 18:22:05,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 18:22:05,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:05,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:05,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1033293076, now seen corresponding path program 1 times [2023-02-15 18:22:05,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:05,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932252150] [2023-02-15 18:22:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:05,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:05,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 18:22:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:05,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 18:22:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:05,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 18:22:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 18:22:05,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:05,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932252150] [2023-02-15 18:22:05,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932252150] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:05,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708928784] [2023-02-15 18:22:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:05,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:05,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:05,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:05,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 18:22:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 18:22:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 18:22:05,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:22:05,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708928784] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:05,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:22:05,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-02-15 18:22:05,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502638582] [2023-02-15 18:22:05,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:05,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 18:22:05,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:05,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 18:22:05,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 18:22:05,988 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-02-15 18:22:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:06,023 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2023-02-15 18:22:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 18:22:06,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 28 [2023-02-15 18:22:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:06,024 INFO L225 Difference]: With dead ends: 43 [2023-02-15 18:22:06,025 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 18:22:06,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 18:22:06,027 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:06,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:06,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 18:22:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-02-15 18:22:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2023-02-15 18:22:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-15 18:22:06,037 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2023-02-15 18:22:06,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:06,037 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-15 18:22:06,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-02-15 18:22:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-15 18:22:06,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 18:22:06,038 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:06,038 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] [2023-02-15 18:22:06,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:06,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 18:22:06,241 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash -14370886, now seen corresponding path program 1 times [2023-02-15 18:22:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:06,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395322226] [2023-02-15 18:22:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:06,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 18:22:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-15 18:22:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-15 18:22:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 18:22:06,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:06,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395322226] [2023-02-15 18:22:06,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395322226] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:06,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:22:06,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 18:22:06,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814940629] [2023-02-15 18:22:06,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:06,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 18:22:06,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:06,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 18:22:06,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 18:22:06,378 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:06,408 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-02-15 18:22:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 18:22:06,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-02-15 18:22:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:06,409 INFO L225 Difference]: With dead ends: 39 [2023-02-15 18:22:06,410 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 18:22:06,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 18:22:06,412 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:06,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 18:22:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-15 18:22:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2023-02-15 18:22:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-15 18:22:06,420 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 37 [2023-02-15 18:22:06,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:06,420 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-15 18:22:06,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:06,421 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-15 18:22:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 18:22:06,423 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:06,423 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] [2023-02-15 18:22:06,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 18:22:06,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:06,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:06,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1444896732, now seen corresponding path program 1 times [2023-02-15 18:22:06,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:06,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772368461] [2023-02-15 18:22:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:06,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 18:22:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-15 18:22:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 18:22:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:22:06,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:06,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772368461] [2023-02-15 18:22:06,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772368461] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:06,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672190025] [2023-02-15 18:22:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:06,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:06,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:06,562 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:06,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 18:22:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:22:06,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 18:22:06,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:22:06,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672190025] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:06,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:06,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2023-02-15 18:22:06,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111313116] [2023-02-15 18:22:06,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:06,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 18:22:06,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:06,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 18:22:06,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 18:22:06,715 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:22:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:06,788 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2023-02-15 18:22:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 18:22:06,788 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-02-15 18:22:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:06,789 INFO L225 Difference]: With dead ends: 49 [2023-02-15 18:22:06,789 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 18:22:06,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-15 18:22:06,791 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:06,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:22:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 18:22:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-02-15 18:22:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2023-02-15 18:22:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-02-15 18:22:06,796 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 39 [2023-02-15 18:22:06,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:06,796 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-02-15 18:22:06,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:22:06,796 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-02-15 18:22:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 18:22:06,797 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:06,797 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:06,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:06,997 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 [2023-02-15 18:22:06,998 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:06,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1089239822, now seen corresponding path program 2 times [2023-02-15 18:22:06,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:06,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492533607] [2023-02-15 18:22:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:06,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:07,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 18:22:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:07,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 18:22:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:07,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 18:22:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 18:22:07,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:07,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492533607] [2023-02-15 18:22:07,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492533607] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:07,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141565342] [2023-02-15 18:22:07,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:22:07,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:07,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:07,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:07,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 18:22:07,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:22:07,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:07,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 18:22:07,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 18:22:08,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 18:22:08,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141565342] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:08,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:08,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2023-02-15 18:22:08,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558643451] [2023-02-15 18:22:08,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:08,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 18:22:08,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:08,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 18:22:08,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 18:22:08,528 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 18:22:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:08,650 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2023-02-15 18:22:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 18:22:08,651 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2023-02-15 18:22:08,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:08,655 INFO L225 Difference]: With dead ends: 73 [2023-02-15 18:22:08,655 INFO L226 Difference]: Without dead ends: 69 [2023-02-15 18:22:08,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 17 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-02-15 18:22:08,656 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:08,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 478 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:22:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-15 18:22:08,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2023-02-15 18:22:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 18:22:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2023-02-15 18:22:08,677 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 48 [2023-02-15 18:22:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:08,679 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2023-02-15 18:22:08,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 18:22:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2023-02-15 18:22:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 18:22:08,683 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:08,684 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:08,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 18:22:08,888 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 [2023-02-15 18:22:08,888 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:08,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:08,889 INFO L85 PathProgramCache]: Analyzing trace with hash -409181452, now seen corresponding path program 1 times [2023-02-15 18:22:08,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:08,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231489203] [2023-02-15 18:22:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:08,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:09,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 18:22:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:09,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 18:22:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:09,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 18:22:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 18:22:09,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231489203] [2023-02-15 18:22:09,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231489203] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165136393] [2023-02-15 18:22:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:09,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:09,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:09,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:09,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 18:22:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:09,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 18:22:09,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:09,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 18:22:10,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-02-15 18:22:10,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 18:22:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 18:22:10,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:10,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-02-15 18:22:10,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-02-15 18:22:10,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-02-15 18:22:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 67 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 18:22:10,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165136393] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:10,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:10,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 19] total 44 [2023-02-15 18:22:10,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963981841] [2023-02-15 18:22:10,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:10,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 18:22:10,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:10,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 18:22:10,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 18:22:10,775 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 44 states, 40 states have (on average 2.525) internal successors, (101), 42 states have internal predecessors, (101), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-15 18:22:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:13,022 INFO L93 Difference]: Finished difference Result 309 states and 458 transitions. [2023-02-15 18:22:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-15 18:22:13,023 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 2.525) internal successors, (101), 42 states have internal predecessors, (101), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 48 [2023-02-15 18:22:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:13,025 INFO L225 Difference]: With dead ends: 309 [2023-02-15 18:22:13,025 INFO L226 Difference]: Without dead ends: 268 [2023-02-15 18:22:13,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3088 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1599, Invalid=9113, Unknown=0, NotChecked=0, Total=10712 [2023-02-15 18:22:13,029 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 391 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:13,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 404 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 18:22:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-02-15 18:22:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 187. [2023-02-15 18:22:13,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 162 states have (on average 1.3395061728395061) internal successors, (217), 168 states have internal predecessors, (217), 13 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (55), 13 states have call predecessors, (55), 13 states have call successors, (55) [2023-02-15 18:22:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 285 transitions. [2023-02-15 18:22:13,056 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 285 transitions. Word has length 48 [2023-02-15 18:22:13,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:13,057 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 285 transitions. [2023-02-15 18:22:13,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 2.525) internal successors, (101), 42 states have internal predecessors, (101), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-15 18:22:13,057 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 285 transitions. [2023-02-15 18:22:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 18:22:13,060 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:13,060 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:13,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:13,265 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 [2023-02-15 18:22:13,267 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:13,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:13,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1360360308, now seen corresponding path program 2 times [2023-02-15 18:22:13,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:13,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644453191] [2023-02-15 18:22:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:13,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:13,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 18:22:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:13,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 18:22:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:13,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 18:22:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 18:22:13,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:13,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644453191] [2023-02-15 18:22:13,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644453191] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:13,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953752639] [2023-02-15 18:22:13,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:22:13,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:13,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:13,803 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:13,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 18:22:13,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:22:13,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:13,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 18:22:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:14,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:22:14,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-02-15 18:22:14,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-02-15 18:22:14,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-02-15 18:22:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 73 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 18:22:17,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:17,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-02-15 18:22:17,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-02-15 18:22:17,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-02-15 18:22:18,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:22:18,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 35 [2023-02-15 18:22:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 47 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 18:22:18,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953752639] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:18,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:18,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 17] total 46 [2023-02-15 18:22:18,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387221788] [2023-02-15 18:22:18,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:18,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 18:22:18,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:18,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 18:22:18,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1848, Unknown=2, NotChecked=0, Total=2070 [2023-02-15 18:22:18,192 INFO L87 Difference]: Start difference. First operand 187 states and 285 transitions. Second operand has 46 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 42 states have internal predecessors, (100), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 18:22:29,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:22:31,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:22:33,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:22:40,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:22:42,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:22:44,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:22:46,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:22:51,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:22:54,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:22:56,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:22:59,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:01,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:06,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:08,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:10,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:12,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:17,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:28,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:30,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:32,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:34,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:36,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:38,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:38,261 INFO L93 Difference]: Finished difference Result 710 states and 1000 transitions. [2023-02-15 18:23:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-02-15 18:23:38,262 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 42 states have internal predecessors, (100), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) Word has length 48 [2023-02-15 18:23:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:38,266 INFO L225 Difference]: With dead ends: 710 [2023-02-15 18:23:38,266 INFO L226 Difference]: Without dead ends: 482 [2023-02-15 18:23:38,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 7183 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=2217, Invalid=18085, Unknown=4, NotChecked=0, Total=20306 [2023-02-15 18:23:38,276 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 531 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 180 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.5s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:38,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 687 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1813 Invalid, 23 Unknown, 0 Unchecked, 48.5s Time] [2023-02-15 18:23:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-02-15 18:23:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 331. [2023-02-15 18:23:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 287 states have (on average 1.3101045296167246) internal successors, (376), 303 states have internal predecessors, (376), 17 states have call successors, (17), 10 states have call predecessors, (17), 26 states have return successors, (71), 17 states have call predecessors, (71), 17 states have call successors, (71) [2023-02-15 18:23:38,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 464 transitions. [2023-02-15 18:23:38,314 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 464 transitions. Word has length 48 [2023-02-15 18:23:38,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:38,314 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 464 transitions. [2023-02-15 18:23:38,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 42 states have internal predecessors, (100), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 18:23:38,314 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 464 transitions. [2023-02-15 18:23:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 18:23:38,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:38,330 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:38,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:38,531 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 [2023-02-15 18:23:38,531 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:38,532 INFO L85 PathProgramCache]: Analyzing trace with hash -868345224, now seen corresponding path program 3 times [2023-02-15 18:23:38,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:38,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662127495] [2023-02-15 18:23:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:38,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:38,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 18:23:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:38,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 18:23:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:38,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 18:23:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 18:23:39,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:39,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662127495] [2023-02-15 18:23:39,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662127495] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:23:39,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217777265] [2023-02-15 18:23:39,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:23:39,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:39,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:39,046 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:39,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 18:23:39,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 18:23:39,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:39,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 18:23:39,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 18:23:39,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 18:23:39,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217777265] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:39,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:23:39,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2023-02-15 18:23:39,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311033016] [2023-02-15 18:23:39,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:39,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 18:23:39,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:39,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 18:23:39,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 18:23:39,542 INFO L87 Difference]: Start difference. First operand 331 states and 464 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 18:23:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:39,700 INFO L93 Difference]: Finished difference Result 599 states and 940 transitions. [2023-02-15 18:23:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 18:23:39,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2023-02-15 18:23:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:39,703 INFO L225 Difference]: With dead ends: 599 [2023-02-15 18:23:39,704 INFO L226 Difference]: Without dead ends: 595 [2023-02-15 18:23:39,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 21 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-02-15 18:23:39,705 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 21 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:39,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 653 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:23:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-02-15 18:23:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 467. [2023-02-15 18:23:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 409 states have (on average 1.3643031784841075) internal successors, (558), 433 states have internal predecessors, (558), 23 states have call successors, (23), 10 states have call predecessors, (23), 34 states have return successors, (119), 23 states have call predecessors, (119), 23 states have call successors, (119) [2023-02-15 18:23:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 700 transitions. [2023-02-15 18:23:39,755 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 700 transitions. Word has length 48 [2023-02-15 18:23:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:39,755 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 700 transitions. [2023-02-15 18:23:39,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 18:23:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 700 transitions. [2023-02-15 18:23:39,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 18:23:39,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:39,757 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:39,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 18:23:39,962 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 [2023-02-15 18:23:39,962 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:39,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:39,963 INFO L85 PathProgramCache]: Analyzing trace with hash -610179786, now seen corresponding path program 4 times [2023-02-15 18:23:39,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:39,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203704801] [2023-02-15 18:23:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:39,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:40,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 18:23:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:40,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 18:23:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:40,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 18:23:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 18:23:40,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:40,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203704801] [2023-02-15 18:23:40,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203704801] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:23:40,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86843985] [2023-02-15 18:23:40,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:23:40,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:40,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:40,805 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:40,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 18:23:40,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:23:40,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:40,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-15 18:23:40,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:41,120 INFO L321 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2023-02-15 18:23:41,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-02-15 18:23:41,313 INFO L321 Elim1Store]: treesize reduction 125, result has 10.7 percent of original size [2023-02-15 18:23:41,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 35 [2023-02-15 18:23:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 18:23:41,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:42,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2023-02-15 18:23:42,184 INFO L321 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2023-02-15 18:23:42,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 85 [2023-02-15 18:23:42,373 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:23:42,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 50 [2023-02-15 18:23:42,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-02-15 18:23:42,407 INFO L321 Elim1Store]: treesize reduction 12, result has 71.4 percent of original size [2023-02-15 18:23:42,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 101 [2023-02-15 18:23:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 18:23:42,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86843985] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:42,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:23:42,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 19] total 54 [2023-02-15 18:23:42,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088569711] [2023-02-15 18:23:42,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:42,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-15 18:23:42,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:42,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-15 18:23:42,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2548, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 18:23:42,697 INFO L87 Difference]: Start difference. First operand 467 states and 700 transitions. Second operand has 54 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 52 states have internal predecessors, (107), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 18:23:47,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:49,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 18:23:52,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:54,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:23:56,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 18:23:58,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:24:00,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:24:02,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:24:02,092 INFO L93 Difference]: Finished difference Result 689 states and 994 transitions. [2023-02-15 18:24:02,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-15 18:24:02,093 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 52 states have internal predecessors, (107), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 48 [2023-02-15 18:24:02,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:24:02,096 INFO L225 Difference]: With dead ends: 689 [2023-02-15 18:24:02,096 INFO L226 Difference]: Without dead ends: 663 [2023-02-15 18:24:02,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5835 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1909, Invalid=13591, Unknown=0, NotChecked=0, Total=15500 [2023-02-15 18:24:02,101 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 346 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 107 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:24:02,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 534 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1258 Invalid, 8 Unknown, 0 Unchecked, 16.0s Time] [2023-02-15 18:24:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-02-15 18:24:02,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 552. [2023-02-15 18:24:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 485 states have (on average 1.377319587628866) internal successors, (668), 516 states have internal predecessors, (668), 24 states have call successors, (24), 11 states have call predecessors, (24), 42 states have return successors, (129), 24 states have call predecessors, (129), 24 states have call successors, (129) [2023-02-15 18:24:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 821 transitions. [2023-02-15 18:24:02,169 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 821 transitions. Word has length 48 [2023-02-15 18:24:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:24:02,170 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 821 transitions. [2023-02-15 18:24:02,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 52 states have internal predecessors, (107), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 18:24:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 821 transitions. [2023-02-15 18:24:02,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 18:24:02,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:24:02,172 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:24:02,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 18:24:02,376 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 [2023-02-15 18:24:02,379 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:24:02,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:24:02,379 INFO L85 PathProgramCache]: Analyzing trace with hash -841093328, now seen corresponding path program 5 times [2023-02-15 18:24:02,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:24:02,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672991369] [2023-02-15 18:24:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:24:02,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:24:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:24:02,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 18:24:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:24:02,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 18:24:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:24:02,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 18:24:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:24:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 18:24:02,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:24:02,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672991369] [2023-02-15 18:24:02,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672991369] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:24:02,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186256768] [2023-02-15 18:24:02,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:24:02,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:24:02,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:24:02,951 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:24:02,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 18:24:03,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 18:24:03,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:24:03,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 18:24:03,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:24:03,252 INFO L321 Elim1Store]: treesize reduction 46, result has 37.8 percent of original size [2023-02-15 18:24:03,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 50 [2023-02-15 18:24:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 18:24:12,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:24:13,527 INFO L321 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2023-02-15 18:24:13,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-02-15 18:24:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 18:24:13,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186256768] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:24:13,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:24:13,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 39 [2023-02-15 18:24:13,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645807044] [2023-02-15 18:24:13,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:24:13,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 18:24:13,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:24:13,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 18:24:13,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1332, Unknown=2, NotChecked=0, Total=1482 [2023-02-15 18:24:13,569 INFO L87 Difference]: Start difference. First operand 552 states and 821 transitions. Second operand has 39 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 35 states have internal predecessors, (89), 6 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 18:24:18,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:24:20,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:24:26,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:24:30,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:24:32,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:24:34,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:24:36,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:24:38,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:24:40,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 18:25:03,575 WARN L233 SmtUtils]: Spent 18.08s on a formula simplification. DAG size of input: 98 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:25:21,708 WARN L233 SmtUtils]: Spent 18.07s on a formula simplification. DAG size of input: 84 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:25:27,869 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 89 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:25:34,022 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 89 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:26:12,285 WARN L233 SmtUtils]: Spent 18.16s on a formula simplification. DAG size of input: 105 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)