./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/sep20-1.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 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 10:23:23,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 10:23:23,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 10:23:23,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 10:23:23,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 10:23:23,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 10:23:23,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 10:23:23,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 10:23:23,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 10:23:23,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 10:23:23,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 10:23:23,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 10:23:23,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 10:23:23,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 10:23:23,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 10:23:23,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 10:23:23,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 10:23:23,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 10:23:23,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 10:23:23,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 10:23:23,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 10:23:23,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 10:23:23,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 10:23:23,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 10:23:23,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 10:23:23,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 10:23:23,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 10:23:23,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 10:23:23,174 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 10:23:23,175 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 10:23:23,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 10:23:23,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 10:23:23,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 10:23:23,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 10:23:23,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 10:23:23,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 10:23:23,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 10:23:23,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 10:23:23,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 10:23:23,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 10:23:23,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 10:23:23,184 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 10:23:23,221 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 10:23:23,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 10:23:23,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 10:23:23,223 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 10:23:23,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 10:23:23,224 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 10:23:23,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 10:23:23,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 10:23:23,224 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 10:23:23,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 10:23:23,225 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 10:23:23,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 10:23:23,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 10:23:23,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 10:23:23,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 10:23:23,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 10:23:23,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 10:23:23,227 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 10:23:23,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 10:23:23,227 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 10:23:23,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 10:23:23,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 10:23:23,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 10:23:23,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 10:23:23,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 10:23:23,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 10:23:23,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 10:23:23,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 10:23:23,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 10:23:23,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 10:23:23,229 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 10:23:23,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 10:23:23,230 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 10:23:23,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 10:23:23,230 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 10:23:23,230 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c [2023-02-18 10:23:23,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 10:23:23,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 10:23:23,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 10:23:23,479 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 10:23:23,479 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 10:23:23,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep20-1.i [2023-02-18 10:23:24,635 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 10:23:24,784 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 10:23:24,784 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i [2023-02-18 10:23:24,789 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a8aedca/8001b596f3d44f72a5779841ec286d72/FLAG2472ca774 [2023-02-18 10:23:24,803 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a8aedca/8001b596f3d44f72a5779841ec286d72 [2023-02-18 10:23:24,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 10:23:24,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 10:23:24,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 10:23:24,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 10:23:24,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 10:23:24,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:24,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@85b22e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24, skipping insertion in model container [2023-02-18 10:23:24,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:24,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 10:23:24,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 10:23:24,952 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/sep20-1.i[1293,1306] [2023-02-18 10:23:24,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 10:23:24,963 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 10:23:24,979 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/sep20-1.i[1293,1306] [2023-02-18 10:23:24,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 10:23:24,990 INFO L208 MainTranslator]: Completed translation [2023-02-18 10:23:24,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24 WrapperNode [2023-02-18 10:23:24,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 10:23:24,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 10:23:24,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 10:23:24,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 10:23:24,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:25,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:25,017 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-18 10:23:25,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 10:23:25,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 10:23:25,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 10:23:25,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 10:23:25,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:25,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:25,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:25,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:25,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:25,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:25,045 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:25,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:25,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 10:23:25,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 10:23:25,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 10:23:25,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 10:23:25,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24" (1/1) ... [2023-02-18 10:23:25,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 10:23:25,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:25,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 10:23:25,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 10:23:25,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 10:23:25,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 10:23:25,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 10:23:25,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 10:23:25,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 10:23:25,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 10:23:25,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 10:23:25,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 10:23:25,129 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-02-18 10:23:25,129 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-02-18 10:23:25,237 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 10:23:25,239 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 10:23:25,450 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 10:23:25,455 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 10:23:25,456 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 10:23:25,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:23:25 BoogieIcfgContainer [2023-02-18 10:23:25,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 10:23:25,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 10:23:25,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 10:23:25,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 10:23:25,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 10:23:24" (1/3) ... [2023-02-18 10:23:25,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21158440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:23:25, skipping insertion in model container [2023-02-18 10:23:25,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:23:24" (2/3) ... [2023-02-18 10:23:25,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21158440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:23:25, skipping insertion in model container [2023-02-18 10:23:25,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:23:25" (3/3) ... [2023-02-18 10:23:25,465 INFO L112 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2023-02-18 10:23:25,481 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 10:23:25,482 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 10:23:25,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 10:23:25,558 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;@430fc060, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 10:23:25,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 10:23:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 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) [2023-02-18 10:23:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 10:23:25,571 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:25,572 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] [2023-02-18 10:23:25,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2023-02-18 10:23:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:25,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338531590] [2023-02-18 10:23:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:25,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:25,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 10:23:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:25,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 10:23:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:25,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-18 10:23:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 10:23:25,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338531590] [2023-02-18 10:23:25,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338531590] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:23:25,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 10:23:25,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 10:23:25,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886583147] [2023-02-18 10:23:25,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:23:25,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:23:25,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:23:25,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 10:23:25,840 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 10:23:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:25,888 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2023-02-18 10:23:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:23:25,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-18 10:23:25,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:25,896 INFO L225 Difference]: With dead ends: 52 [2023-02-18 10:23:25,897 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 10:23:25,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 10:23:25,902 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:25,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:25,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 10:23:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-18 10:23:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2023-02-18 10:23:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-18 10:23:25,935 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2023-02-18 10:23:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:25,935 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-18 10:23:25,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 10:23:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-18 10:23:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 10:23:25,937 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:25,937 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:25,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 10:23:25,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:25,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2023-02-18 10:23:25,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:25,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641224486] [2023-02-18 10:23:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:25,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:26,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 10:23:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:26,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 10:23:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:26,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-18 10:23:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 10:23:26,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:26,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641224486] [2023-02-18 10:23:26,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641224486] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:26,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996134704] [2023-02-18 10:23:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:26,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:26,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:26,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:26,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 10:23:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:26,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 10:23:26,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 10:23:26,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 10:23:26,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996134704] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:23:26,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 10:23:26,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-18 10:23:26,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581730170] [2023-02-18 10:23:26,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:23:26,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:23:26,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:26,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:23:26,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 10:23:26,274 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-02-18 10:23:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:26,289 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-02-18 10:23:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:23:26,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 30 [2023-02-18 10:23:26,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:26,291 INFO L225 Difference]: With dead ends: 45 [2023-02-18 10:23:26,292 INFO L226 Difference]: Without dead ends: 27 [2023-02-18 10:23:26,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 10:23:26,294 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:26,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-18 10:23:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-18 10:23:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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) [2023-02-18 10:23:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-02-18 10:23:26,298 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2023-02-18 10:23:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:26,299 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-02-18 10:23:26,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-02-18 10:23:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-02-18 10:23:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 10:23:26,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:26,301 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] [2023-02-18 10:23:26,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:26,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:26,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:26,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:26,508 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2023-02-18 10:23:26,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:26,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630752042] [2023-02-18 10:23:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:26,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:26,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 10:23:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:26,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-18 10:23:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:26,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 10:23:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 10:23:26,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:26,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630752042] [2023-02-18 10:23:26,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630752042] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:26,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28195307] [2023-02-18 10:23:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:26,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:26,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:26,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:26,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 10:23:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:26,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 10:23:26,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 10:23:26,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 10:23:26,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28195307] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:23:26,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 10:23:26,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-02-18 10:23:26,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004445789] [2023-02-18 10:23:26,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:23:26,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:23:26,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:26,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:23:26,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 10:23:26,799 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2023-02-18 10:23:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:26,816 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-02-18 10:23:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:23:26,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 39 [2023-02-18 10:23:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:26,818 INFO L225 Difference]: With dead ends: 41 [2023-02-18 10:23:26,818 INFO L226 Difference]: Without dead ends: 27 [2023-02-18 10:23:26,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 10:23:26,819 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:26,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:26,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-18 10:23:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-02-18 10:23:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:23:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-18 10:23:26,832 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2023-02-18 10:23:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:26,834 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-18 10:23:26,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2023-02-18 10:23:26,834 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-18 10:23:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 10:23:26,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:26,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:26,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:27,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-18 10:23:27,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:27,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:27,051 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2023-02-18 10:23:27,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:27,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773440664] [2023-02-18 10:23:27,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:27,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:27,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 10:23:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:27,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-18 10:23:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:27,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-18 10:23:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 10:23:27,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:27,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773440664] [2023-02-18 10:23:27,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773440664] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:27,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205939742] [2023-02-18 10:23:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:27,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:27,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:27,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:27,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 10:23:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:27,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 10:23:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-18 10:23:27,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-18 10:23:27,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205939742] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:27,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:27,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-18 10:23:27,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596436702] [2023-02-18 10:23:27,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:27,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 10:23:27,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:27,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 10:23:27,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-18 10:23:27,362 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 10:23:27,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:27,406 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2023-02-18 10:23:27,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 10:23:27,407 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2023-02-18 10:23:27,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:27,408 INFO L225 Difference]: With dead ends: 58 [2023-02-18 10:23:27,408 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 10:23:27,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-18 10:23:27,409 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:27,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 156 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:27,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 10:23:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-02-18 10:23:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 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) [2023-02-18 10:23:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-02-18 10:23:27,416 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2023-02-18 10:23:27,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:27,416 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-02-18 10:23:27,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 10:23:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-02-18 10:23:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 10:23:27,419 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:27,419 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:27,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:27,625 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 [2023-02-18 10:23:27,626 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:27,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2023-02-18 10:23:27,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:27,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111718375] [2023-02-18 10:23:27,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:27,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:27,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 10:23:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:27,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 10:23:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:27,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-18 10:23:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-02-18 10:23:27,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:27,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111718375] [2023-02-18 10:23:27,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111718375] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:27,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050200138] [2023-02-18 10:23:27,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:23:27,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:27,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:27,725 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:27,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 10:23:27,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:23:27,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:23:27,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 10:23:27,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 10:23:27,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 10:23:27,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050200138] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:27,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:27,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-18 10:23:27,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925658594] [2023-02-18 10:23:27,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:27,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 10:23:27,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:27,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 10:23:27,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 10:23:27,925 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 10:23:27,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:27,981 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2023-02-18 10:23:27,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 10:23:27,981 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2023-02-18 10:23:27,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:27,983 INFO L225 Difference]: With dead ends: 74 [2023-02-18 10:23:27,983 INFO L226 Difference]: Without dead ends: 50 [2023-02-18 10:23:27,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 10:23:27,985 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:27,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 111 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:27,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-18 10:23:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-02-18 10:23:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 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) [2023-02-18 10:23:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2023-02-18 10:23:28,003 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2023-02-18 10:23:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:28,003 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2023-02-18 10:23:28,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 10:23:28,004 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2023-02-18 10:23:28,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-18 10:23:28,009 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:28,009 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:28,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:28,215 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 [2023-02-18 10:23:28,215 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:28,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2023-02-18 10:23:28,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:28,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163823808] [2023-02-18 10:23:28,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:28,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:28,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-18 10:23:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:28,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 10:23:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:28,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-18 10:23:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-18 10:23:28,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:28,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163823808] [2023-02-18 10:23:28,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163823808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:28,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076655749] [2023-02-18 10:23:28,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 10:23:28,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:28,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:28,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:28,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 10:23:28,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 10:23:28,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:23:28,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 10:23:28,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-18 10:23:28,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-18 10:23:28,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076655749] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:28,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:28,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-18 10:23:28,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634266271] [2023-02-18 10:23:28,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:28,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 10:23:28,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 10:23:28,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-18 10:23:28,682 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:23:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:28,744 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2023-02-18 10:23:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 10:23:28,745 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2023-02-18 10:23:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:28,747 INFO L225 Difference]: With dead ends: 90 [2023-02-18 10:23:28,747 INFO L226 Difference]: Without dead ends: 64 [2023-02-18 10:23:28,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-18 10:23:28,749 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:28,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 118 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:28,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-18 10:23:28,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-02-18 10:23:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 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) [2023-02-18 10:23:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2023-02-18 10:23:28,760 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2023-02-18 10:23:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:28,761 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2023-02-18 10:23:28,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:23:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2023-02-18 10:23:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-18 10:23:28,763 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:28,763 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:28,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:28,970 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 [2023-02-18 10:23:28,970 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:28,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2023-02-18 10:23:28,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:28,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57808846] [2023-02-18 10:23:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:28,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:29,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-18 10:23:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:29,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 10:23:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:29,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-18 10:23:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-18 10:23:29,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:29,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57808846] [2023-02-18 10:23:29,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57808846] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:29,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740298497] [2023-02-18 10:23:29,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 10:23:29,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:29,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:29,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:29,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 10:23:29,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 10:23:29,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:23:29,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 10:23:29,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-18 10:23:29,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-18 10:23:29,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740298497] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:29,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:29,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-02-18 10:23:29,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743609419] [2023-02-18 10:23:29,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:29,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 10:23:29,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:29,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 10:23:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-02-18 10:23:29,724 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 10:23:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:29,773 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2023-02-18 10:23:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 10:23:29,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2023-02-18 10:23:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:29,774 INFO L225 Difference]: With dead ends: 119 [2023-02-18 10:23:29,774 INFO L226 Difference]: Without dead ends: 81 [2023-02-18 10:23:29,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 15 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-02-18 10:23:29,776 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:29,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 74 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-18 10:23:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-18 10:23:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 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) [2023-02-18 10:23:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2023-02-18 10:23:29,783 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 108 [2023-02-18 10:23:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:29,783 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2023-02-18 10:23:29,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 10:23:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2023-02-18 10:23:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-02-18 10:23:29,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:29,785 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:29,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:29,991 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 [2023-02-18 10:23:29,991 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:29,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2004558111, now seen corresponding path program 5 times [2023-02-18 10:23:29,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:29,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186593236] [2023-02-18 10:23:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:29,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:30,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 10:23:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:30,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-18 10:23:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:30,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-02-18 10:23:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2023-02-18 10:23:30,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:30,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186593236] [2023-02-18 10:23:30,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186593236] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:30,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571378704] [2023-02-18 10:23:30,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 10:23:30,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:30,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:30,281 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:30,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 10:23:31,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-02-18 10:23:31,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:23:31,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 10:23:31,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2023-02-18 10:23:31,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2023-02-18 10:23:31,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571378704] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:31,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:31,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-18 10:23:31,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036405852] [2023-02-18 10:23:31,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:31,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 10:23:31,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 10:23:31,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-18 10:23:31,225 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 10:23:31,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:31,261 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2023-02-18 10:23:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 10:23:31,262 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2023-02-18 10:23:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:31,263 INFO L225 Difference]: With dead ends: 142 [2023-02-18 10:23:31,263 INFO L226 Difference]: Without dead ends: 105 [2023-02-18 10:23:31,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 245 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-18 10:23:31,264 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:31,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 96 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-18 10:23:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-02-18 10:23:31,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:23:31,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2023-02-18 10:23:31,271 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 126 [2023-02-18 10:23:31,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:31,271 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2023-02-18 10:23:31,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 10:23:31,272 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2023-02-18 10:23:31,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-02-18 10:23:31,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:31,273 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 20, 20, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:31,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:31,482 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 [2023-02-18 10:23:31,482 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:31,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:31,483 INFO L85 PathProgramCache]: Analyzing trace with hash 848751647, now seen corresponding path program 6 times [2023-02-18 10:23:31,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:31,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681210040] [2023-02-18 10:23:31,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:31,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:32,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 10:23:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:32,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-02-18 10:23:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:32,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-02-18 10:23:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1601 trivial. 0 not checked. [2023-02-18 10:23:32,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:32,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681210040] [2023-02-18 10:23:32,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681210040] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:32,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802049144] [2023-02-18 10:23:32,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 10:23:32,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:32,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:32,295 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:32,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 10:23:32,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 10:23:32,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:23:32,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 10:23:32,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2023-02-18 10:23:32,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2023-02-18 10:23:32,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802049144] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:32,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:32,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2023-02-18 10:23:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864149249] [2023-02-18 10:23:32,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:32,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 10:23:32,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 10:23:32,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-18 10:23:32,510 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:23:32,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:32,581 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2023-02-18 10:23:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 10:23:32,581 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 198 [2023-02-18 10:23:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:32,582 INFO L225 Difference]: With dead ends: 179 [2023-02-18 10:23:32,582 INFO L226 Difference]: Without dead ends: 118 [2023-02-18 10:23:32,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-18 10:23:32,584 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:32,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 236 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:23:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-18 10:23:32,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2023-02-18 10:23:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.162162162162162) internal successors, (129), 111 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:23:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2023-02-18 10:23:32,591 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 198 [2023-02-18 10:23:32,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:32,591 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2023-02-18 10:23:32,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:23:32,591 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2023-02-18 10:23:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-02-18 10:23:32,593 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:32,593 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:32,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:32,805 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 [2023-02-18 10:23:32,805 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:32,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash -217509715, now seen corresponding path program 7 times [2023-02-18 10:23:32,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:32,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897203268] [2023-02-18 10:23:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:32,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:33,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 10:23:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:33,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-18 10:23:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:33,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-02-18 10:23:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2023-02-18 10:23:33,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:33,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897203268] [2023-02-18 10:23:33,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897203268] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:33,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843731134] [2023-02-18 10:23:33,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 10:23:33,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:33,597 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:33,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 10:23:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 10:23:33,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2023-02-18 10:23:33,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2023-02-18 10:23:34,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843731134] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:34,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:34,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 22 [2023-02-18 10:23:34,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083129814] [2023-02-18 10:23:34,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:34,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 10:23:34,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:34,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 10:23:34,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-18 10:23:34,133 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 10:23:34,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:34,187 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2023-02-18 10:23:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 10:23:34,187 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 215 [2023-02-18 10:23:34,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:34,189 INFO L225 Difference]: With dead ends: 203 [2023-02-18 10:23:34,189 INFO L226 Difference]: Without dead ends: 131 [2023-02-18 10:23:34,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 405 SyntacticMatches, 27 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-18 10:23:34,190 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:34,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 152 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-18 10:23:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-02-18 10:23:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 126 states have internal predecessors, (149), 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) [2023-02-18 10:23:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2023-02-18 10:23:34,196 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 215 [2023-02-18 10:23:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:34,196 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2023-02-18 10:23:34,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 10:23:34,197 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2023-02-18 10:23:34,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-02-18 10:23:34,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:34,199 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:34,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:34,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 10:23:34,407 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:34,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2054059049, now seen corresponding path program 8 times [2023-02-18 10:23:34,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:34,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3345905] [2023-02-18 10:23:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:34,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:34,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 10:23:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:34,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-18 10:23:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:34,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2023-02-18 10:23:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2023-02-18 10:23:34,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3345905] [2023-02-18 10:23:34,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3345905] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:34,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431686585] [2023-02-18 10:23:34,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:23:34,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:34,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:34,854 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:34,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 10:23:35,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:23:35,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:23:35,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 10:23:35,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 2490 proven. 36 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2023-02-18 10:23:35,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2023-02-18 10:23:35,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431686585] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:35,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:35,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-18 10:23:35,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872446078] [2023-02-18 10:23:35,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:35,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 10:23:35,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:35,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 10:23:35,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-18 10:23:35,209 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 10:23:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:35,246 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2023-02-18 10:23:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 10:23:35,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 260 [2023-02-18 10:23:35,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:35,248 INFO L225 Difference]: With dead ends: 218 [2023-02-18 10:23:35,248 INFO L226 Difference]: Without dead ends: 147 [2023-02-18 10:23:35,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 512 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-18 10:23:35,249 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:35,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-18 10:23:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-02-18 10:23:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 142 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:23:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2023-02-18 10:23:35,255 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 260 [2023-02-18 10:23:35,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:35,256 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2023-02-18 10:23:35,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 10:23:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2023-02-18 10:23:35,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-02-18 10:23:35,259 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:35,259 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:35,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 10:23:35,467 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash -371662137, now seen corresponding path program 9 times [2023-02-18 10:23:35,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:35,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371214529] [2023-02-18 10:23:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:35,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:36,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 10:23:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:36,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-18 10:23:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:36,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2023-02-18 10:23:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2023-02-18 10:23:36,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:36,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371214529] [2023-02-18 10:23:36,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371214529] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:36,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218339760] [2023-02-18 10:23:36,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 10:23:36,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:36,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:36,213 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:36,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 10:23:40,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-02-18 10:23:40,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:23:40,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-18 10:23:40,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 2490 proven. 196 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2023-02-18 10:23:40,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2023-02-18 10:23:40,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218339760] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:40,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:40,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2023-02-18 10:23:40,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044243759] [2023-02-18 10:23:40,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:40,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 10:23:40,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:40,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 10:23:40,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-18 10:23:40,451 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 10:23:40,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:23:40,499 INFO L93 Difference]: Finished difference Result 228 states and 277 transitions. [2023-02-18 10:23:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 10:23:40,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 276 [2023-02-18 10:23:40,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:23:40,501 INFO L225 Difference]: With dead ends: 228 [2023-02-18 10:23:40,501 INFO L226 Difference]: Without dead ends: 157 [2023-02-18 10:23:40,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 528 SyntacticMatches, 25 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-18 10:23:40,502 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:23:40,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 72 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:23:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-18 10:23:40,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-02-18 10:23:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 states have internal predecessors, (175), 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) [2023-02-18 10:23:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 181 transitions. [2023-02-18 10:23:40,507 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 181 transitions. Word has length 276 [2023-02-18 10:23:40,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:23:40,508 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 181 transitions. [2023-02-18 10:23:40,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 10:23:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 181 transitions. [2023-02-18 10:23:40,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-18 10:23:40,511 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:23:40,511 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:23:40,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 10:23:40,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 10:23:40,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:23:40,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:23:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2076360355, now seen corresponding path program 10 times [2023-02-18 10:23:40,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:23:40,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470474944] [2023-02-18 10:23:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:23:40,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:23:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:46,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 10:23:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:47,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-18 10:23:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:48,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-18 10:23:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:23:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 116 proven. 5524 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2023-02-18 10:23:49,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:23:49,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470474944] [2023-02-18 10:23:49,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470474944] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:23:49,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639281494] [2023-02-18 10:23:49,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 10:23:49,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:23:49,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:23:49,921 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:23:49,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 10:23:50,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 10:23:50,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:23:50,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 145 conjunts are in the unsatisfiable core [2023-02-18 10:23:50,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:23:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2023-02-18 10:23:57,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:23:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2023-02-18 10:23:59,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639281494] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:23:59,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:23:59,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 30, 30] total 92 [2023-02-18 10:23:59,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286829479] [2023-02-18 10:23:59,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:23:59,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-02-18 10:23:59,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:23:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-02-18 10:23:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=8089, Unknown=0, NotChecked=0, Total=8372 [2023-02-18 10:23:59,378 INFO L87 Difference]: Start difference. First operand 157 states and 181 transitions. Second operand has 92 states, 90 states have (on average 2.5444444444444443) internal successors, (229), 86 states have internal predecessors, (229), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-18 10:24:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:24:05,327 INFO L93 Difference]: Finished difference Result 902 states and 1308 transitions. [2023-02-18 10:24:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-18 10:24:05,327 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 90 states have (on average 2.5444444444444443) internal successors, (229), 86 states have internal predecessors, (229), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 286 [2023-02-18 10:24:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:24:05,335 INFO L225 Difference]: With dead ends: 902 [2023-02-18 10:24:05,335 INFO L226 Difference]: Without dead ends: 898 [2023-02-18 10:24:05,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 496 SyntacticMatches, 75 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3882 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=308, Invalid=8622, Unknown=0, NotChecked=0, Total=8930 [2023-02-18 10:24:05,344 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 220 mSDsluCounter, 5156 mSDsCounter, 0 mSdLazyCounter, 10328 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 5281 SdHoareTripleChecker+Invalid, 10475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 10328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-02-18 10:24:05,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 5281 Invalid, 10475 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 10328 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-02-18 10:24:05,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2023-02-18 10:24:05,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 584. [2023-02-18 10:24:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 576 states have (on average 1.2864583333333333) internal successors, (741), 577 states have internal predecessors, (741), 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) [2023-02-18 10:24:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 755 transitions. [2023-02-18 10:24:05,441 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 755 transitions. Word has length 286 [2023-02-18 10:24:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:24:05,441 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 755 transitions. [2023-02-18 10:24:05,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 90 states have (on average 2.5444444444444443) internal successors, (229), 86 states have internal predecessors, (229), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-18 10:24:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 755 transitions. [2023-02-18 10:24:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-18 10:24:05,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:24:05,450 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:24:05,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 10:24:05,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 10:24:05,658 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:24:05,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:24:05,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1396301985, now seen corresponding path program 1 times [2023-02-18 10:24:05,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:24:05,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134180979] [2023-02-18 10:24:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:24:05,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:24:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:24:14,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 10:24:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:24:14,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-18 10:24:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:24:14,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-18 10:24:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:24:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1244 proven. 3639 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2023-02-18 10:24:16,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:24:16,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134180979] [2023-02-18 10:24:16,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134180979] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:24:16,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651039225] [2023-02-18 10:24:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:24:16,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:24:16,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:24:16,101 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:24:16,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 10:24:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:24:16,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-18 10:24:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:24:16,477 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 [2023-02-18 10:24:16,942 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 40 treesize of output 24 [2023-02-18 10:24:16,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-18 10:24:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2491 proven. 1872 refuted. 0 times theorem prover too weak. 1903 trivial. 0 not checked. [2023-02-18 10:24:18,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:24:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2566 proven. 1795 refuted. 0 times theorem prover too weak. 1905 trivial. 0 not checked. [2023-02-18 10:24:21,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651039225] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:24:21,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:24:21,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 32, 30] total 106 [2023-02-18 10:24:21,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410344573] [2023-02-18 10:24:21,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:24:21,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-02-18 10:24:21,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:24:21,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-02-18 10:24:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=10747, Unknown=0, NotChecked=0, Total=11130 [2023-02-18 10:24:21,401 INFO L87 Difference]: Start difference. First operand 584 states and 755 transitions. Second operand has 106 states, 104 states have (on average 2.7884615384615383) internal successors, (290), 103 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-18 10:24:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:24:41,528 INFO L93 Difference]: Finished difference Result 3097 states and 4235 transitions. [2023-02-18 10:24:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2023-02-18 10:24:41,528 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 104 states have (on average 2.7884615384615383) internal successors, (290), 103 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 286 [2023-02-18 10:24:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:24:41,539 INFO L225 Difference]: With dead ends: 3097 [2023-02-18 10:24:41,540 INFO L226 Difference]: Without dead ends: 2382 [2023-02-18 10:24:41,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 616 SyntacticMatches, 52 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 24512 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=2739, Invalid=72063, Unknown=0, NotChecked=0, Total=74802 [2023-02-18 10:24:41,555 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 630 mSDsluCounter, 4638 mSDsCounter, 0 mSdLazyCounter, 10008 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 4734 SdHoareTripleChecker+Invalid, 10100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 10008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-02-18 10:24:41,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 4734 Invalid, 10100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 10008 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-02-18 10:24:41,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2023-02-18 10:24:41,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1597. [2023-02-18 10:24:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1578 states have (on average 1.3193916349809887) internal successors, (2082), 1581 states have internal predecessors, (2082), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2023-02-18 10:24:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2127 transitions. [2023-02-18 10:24:41,725 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2127 transitions. Word has length 286 [2023-02-18 10:24:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:24:41,726 INFO L495 AbstractCegarLoop]: Abstraction has 1597 states and 2127 transitions. [2023-02-18 10:24:41,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 104 states have (on average 2.7884615384615383) internal successors, (290), 103 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-18 10:24:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2127 transitions. [2023-02-18 10:24:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-18 10:24:41,739 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:24:41,739 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:24:41,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 10:24:41,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 10:24:41,948 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:24:41,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:24:41,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1818194917, now seen corresponding path program 2 times [2023-02-18 10:24:41,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:24:41,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700206420] [2023-02-18 10:24:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:24:41,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:24:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:24:53,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 10:24:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:24:54,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-18 10:24:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:24:54,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-18 10:24:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:24:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1552 proven. 4066 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2023-02-18 10:24:55,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:24:55,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700206420] [2023-02-18 10:24:55,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700206420] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:24:55,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456802104] [2023-02-18 10:24:55,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:24:55,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:24:55,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:24:55,399 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:24:55,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 10:24:55,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:24:55,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:24:55,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 224 conjunts are in the unsatisfiable core [2023-02-18 10:24:55,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:24:55,852 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 [2023-02-18 10:24:56,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:56,872 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 71 treesize of output 66 [2023-02-18 10:24:56,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:56,976 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 71 treesize of output 66 [2023-02-18 10:24:57,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:57,067 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 71 treesize of output 66 [2023-02-18 10:24:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:57,153 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 71 treesize of output 66 [2023-02-18 10:24:57,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:57,241 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 71 treesize of output 66 [2023-02-18 10:24:57,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:57,331 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 71 treesize of output 66 [2023-02-18 10:24:57,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:57,449 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 71 treesize of output 66 [2023-02-18 10:24:57,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:57,635 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 71 treesize of output 66 [2023-02-18 10:24:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:57,729 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 71 treesize of output 66 [2023-02-18 10:24:57,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:57,859 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 71 treesize of output 66 [2023-02-18 10:24:57,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:57,958 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 71 treesize of output 66 [2023-02-18 10:24:58,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:58,057 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 71 treesize of output 66 [2023-02-18 10:24:58,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:58,170 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 71 treesize of output 66 [2023-02-18 10:24:58,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:58,282 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 71 treesize of output 66 [2023-02-18 10:24:58,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:58,491 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 71 treesize of output 66 [2023-02-18 10:24:58,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:58,598 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 71 treesize of output 66 [2023-02-18 10:24:58,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:58,706 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 71 treesize of output 66 [2023-02-18 10:24:58,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:58,818 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 71 treesize of output 66 [2023-02-18 10:24:58,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:24:58,935 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 10:24:58,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:24:58,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 82 [2023-02-18 10:24:59,039 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 10:24:59,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:24:59,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 97 [2023-02-18 10:25:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2545 proven. 3127 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2023-02-18 10:25:02,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:25:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2620 proven. 2651 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2023-02-18 10:25:27,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456802104] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:25:27,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:25:27,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 88, 84] total 193 [2023-02-18 10:25:27,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425443205] [2023-02-18 10:25:27,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:25:27,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-02-18 10:25:27,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:25:27,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-02-18 10:25:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=35914, Unknown=0, NotChecked=0, Total=37056 [2023-02-18 10:25:27,095 INFO L87 Difference]: Start difference. First operand 1597 states and 2127 transitions. Second operand has 193 states, 193 states have (on average 2.2694300518134716) internal successors, (438), 191 states have internal predecessors, (438), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-18 10:26:05,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:26:05,339 INFO L93 Difference]: Finished difference Result 7081 states and 9771 transitions. [2023-02-18 10:26:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2023-02-18 10:26:05,341 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.2694300518134716) internal successors, (438), 191 states have internal predecessors, (438), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 286 [2023-02-18 10:26:05,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:26:05,363 INFO L225 Difference]: With dead ends: 7081 [2023-02-18 10:26:05,363 INFO L226 Difference]: Without dead ends: 5026 [2023-02-18 10:26:05,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 448 SyntacticMatches, 74 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19706 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=3016, Invalid=64324, Unknown=0, NotChecked=0, Total=67340 [2023-02-18 10:26:05,375 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 469 mSDsluCounter, 12920 mSDsCounter, 0 mSdLazyCounter, 26242 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 13058 SdHoareTripleChecker+Invalid, 26381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 26242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:26:05,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 13058 Invalid, 26381 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [139 Valid, 26242 Invalid, 0 Unknown, 0 Unchecked, 23.0s Time] [2023-02-18 10:26:05,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2023-02-18 10:26:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3257. [2023-02-18 10:26:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 3220 states have (on average 1.3217391304347825) internal successors, (4256), 3226 states have internal predecessors, (4256), 19 states have call successors, (19), 11 states have call predecessors, (19), 17 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2023-02-18 10:26:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4366 transitions. [2023-02-18 10:26:05,781 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4366 transitions. Word has length 286 [2023-02-18 10:26:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:26:05,781 INFO L495 AbstractCegarLoop]: Abstraction has 3257 states and 4366 transitions. [2023-02-18 10:26:05,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.2694300518134716) internal successors, (438), 191 states have internal predecessors, (438), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-18 10:26:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4366 transitions. [2023-02-18 10:26:05,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-18 10:26:05,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:26:05,803 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:26:05,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-18 10:26:06,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:26:06,013 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:26:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:26:06,014 INFO L85 PathProgramCache]: Analyzing trace with hash 938743263, now seen corresponding path program 3 times [2023-02-18 10:26:06,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:26:06,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664781092] [2023-02-18 10:26:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:26:06,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:26:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:26:14,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 10:26:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:26:14,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-18 10:26:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:26:15,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-18 10:26:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:26:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2490 proven. 3130 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2023-02-18 10:26:16,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:26:16,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664781092] [2023-02-18 10:26:16,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664781092] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:26:16,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759013577] [2023-02-18 10:26:16,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 10:26:16,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:26:16,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:26:16,286 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:26:16,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 10:26:33,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2023-02-18 10:26:33,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:26:33,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 204 conjunts are in the unsatisfiable core [2023-02-18 10:26:33,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:26:34,793 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 [2023-02-18 10:26:36,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:26:36,341 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 74 treesize of output 67 [2023-02-18 10:26:36,373 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 60 treesize of output 50 [2023-02-18 10:26:36,434 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 65 treesize of output 55 [2023-02-18 10:26:36,469 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 70 treesize of output 60 [2023-02-18 10:26:36,506 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 75 treesize of output 65 [2023-02-18 10:26:36,545 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 80 treesize of output 70 [2023-02-18 10:26:36,589 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 85 treesize of output 75 [2023-02-18 10:26:36,636 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 90 treesize of output 80 [2023-02-18 10:26:36,726 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 95 treesize of output 85 [2023-02-18 10:26:36,778 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 100 treesize of output 90 [2023-02-18 10:26:36,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:26:36,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 67 [2023-02-18 10:26:36,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:26:36,955 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 3 case distinctions, treesize of input 67 treesize of output 126 [2023-02-18 10:26:37,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:26:37,276 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 3 case distinctions, treesize of input 67 treesize of output 126 [2023-02-18 10:26:37,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:26:37,417 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 3 case distinctions, treesize of input 67 treesize of output 126 [2023-02-18 10:26:37,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:26:37,616 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 3 case distinctions, treesize of input 67 treesize of output 126 [2023-02-18 10:26:37,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:26:37,710 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 3 case distinctions, treesize of input 67 treesize of output 126 [2023-02-18 10:26:37,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:26:37,889 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 3 case distinctions, treesize of input 67 treesize of output 126 [2023-02-18 10:26:38,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:26:38,064 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 5 case distinctions, treesize of input 77 treesize of output 173 [2023-02-18 10:26:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:26:38,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:26:38,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 517 treesize of output 442 [2023-02-18 10:26:47,925 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 127 treesize of output 120 [2023-02-18 10:26:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 3705 proven. 1081 refuted. 0 times theorem prover too weak. 1480 trivial. 0 not checked. [2023-02-18 10:26:49,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:26:49,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759013577] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:26:49,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 10:26:49,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 61] total 113 [2023-02-18 10:26:49,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515010152] [2023-02-18 10:26:49,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 10:26:49,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-02-18 10:26:49,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:26:49,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-02-18 10:26:49,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=12112, Unknown=0, NotChecked=0, Total=12882 [2023-02-18 10:26:49,623 INFO L87 Difference]: Start difference. First operand 3257 states and 4366 transitions. Second operand has 113 states, 113 states have (on average 2.1769911504424777) internal successors, (246), 112 states have internal predecessors, (246), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 10:26:54,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:26:58,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:27:12,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:27:22,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:27:36,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:27:40,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:27:42,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:27:44,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:28:39,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:28:42,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:29:01,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:29:03,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:29:18,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:29:21,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:29:25,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:29:44,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:29:55,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:30:13,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:30:19,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:30:25,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:30:29,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:30:43,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:30:53,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:30:57,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:31:01,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:31:19,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:31:22,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:31:26,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:31:38,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:31:47,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:31:50,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:32:11,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:32:22,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:32:26,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:32:46,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:33:01,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:33:04,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:33:25,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:33:29,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:33:33,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:33:56,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:34:00,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:34:03,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:34:27,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:34:32,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:34:42,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:34:45,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:34:52,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:34:55,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:35:06,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:35:09,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:35:18,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:35:26,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:35:29,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:35:32,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:35:55,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:35:56,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:35:59,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:36:03,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-18 10:36:21,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]