./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/verifythis/tree_max.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 06:29:32,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 06:29:32,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 06:29:32,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 06:29:32,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 06:29:32,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 06:29:32,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 06:29:32,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 06:29:32,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 06:29:32,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 06:29:32,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 06:29:32,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 06:29:32,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 06:29:32,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 06:29:32,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 06:29:32,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 06:29:32,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 06:29:32,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 06:29:32,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 06:29:32,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 06:29:32,134 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 06:29:32,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 06:29:32,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 06:29:32,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 06:29:32,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 06:29:32,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 06:29:32,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 06:29:32,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 06:29:32,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 06:29:32,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 06:29:32,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 06:29:32,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 06:29:32,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 06:29:32,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 06:29:32,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 06:29:32,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 06:29:32,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 06:29:32,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 06:29:32,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 06:29:32,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 06:29:32,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 06:29:32,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 06:29:32,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 06:29:32,172 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 06:29:32,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 06:29:32,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 06:29:32,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 06:29:32,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 06:29:32,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 06:29:32,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 06:29:32,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 06:29:32,174 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 06:29:32,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 06:29:32,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 06:29:32,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 06:29:32,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 06:29:32,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 06:29:32,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 06:29:32,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 06:29:32,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 06:29:32,176 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 06:29:32,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 06:29:32,176 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 06:29:32,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 06:29:32,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 06:29:32,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 06:29:32,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 06:29:32,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:29:32,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 06:29:32,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 06:29:32,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 06:29:32,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 06:29:32,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 06:29:32,179 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 06:29:32,179 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 06:29:32,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 06:29:32,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2022-07-12 06:29:32,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 06:29:32,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 06:29:32,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 06:29:32,418 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 06:29:32,420 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 06:29:32,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2022-07-12 06:29:32,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/597ed48f3/79b21d650d454e6d82ea8da6b9fac8e6/FLAGa2b710abe [2022-07-12 06:29:32,849 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 06:29:32,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2022-07-12 06:29:32,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/597ed48f3/79b21d650d454e6d82ea8da6b9fac8e6/FLAGa2b710abe [2022-07-12 06:29:32,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/597ed48f3/79b21d650d454e6d82ea8da6b9fac8e6 [2022-07-12 06:29:32,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 06:29:32,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 06:29:32,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 06:29:32,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 06:29:32,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 06:29:32,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:29:32" (1/1) ... [2022-07-12 06:29:32,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7366c34f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:32, skipping insertion in model container [2022-07-12 06:29:32,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:29:32" (1/1) ... [2022-07-12 06:29:32,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 06:29:32,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 06:29:33,057 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-07-12 06:29:33,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:29:33,089 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 06:29:33,105 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-07-12 06:29:33,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:29:33,133 INFO L208 MainTranslator]: Completed translation [2022-07-12 06:29:33,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:33 WrapperNode [2022-07-12 06:29:33,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 06:29:33,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 06:29:33,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 06:29:33,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 06:29:33,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:33" (1/1) ... [2022-07-12 06:29:33,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:33" (1/1) ... [2022-07-12 06:29:33,186 INFO L137 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 38 [2022-07-12 06:29:33,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 06:29:33,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 06:29:33,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 06:29:33,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 06:29:33,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:33" (1/1) ... [2022-07-12 06:29:33,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:33" (1/1) ... [2022-07-12 06:29:33,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:33" (1/1) ... [2022-07-12 06:29:33,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:33" (1/1) ... [2022-07-12 06:29:33,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:33" (1/1) ... [2022-07-12 06:29:33,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:33" (1/1) ... [2022-07-12 06:29:33,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:33" (1/1) ... [2022-07-12 06:29:33,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 06:29:33,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 06:29:33,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 06:29:33,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 06:29:33,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:33" (1/1) ... [2022-07-12 06:29:33,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:29:33,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:29:33,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 06:29:33,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 06:29:33,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 06:29:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 06:29:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-07-12 06:29:33,328 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-07-12 06:29:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-07-12 06:29:33,328 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-07-12 06:29:33,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 06:29:33,331 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-07-12 06:29:33,332 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-07-12 06:29:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 06:29:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 06:29:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 06:29:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 06:29:33,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 06:29:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 06:29:33,426 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 06:29:33,427 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 06:29:33,574 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 06:29:33,578 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 06:29:33,578 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 06:29:33,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:29:33 BoogieIcfgContainer [2022-07-12 06:29:33,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 06:29:33,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 06:29:33,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 06:29:33,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 06:29:33,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:29:32" (1/3) ... [2022-07-12 06:29:33,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752e7f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:29:33, skipping insertion in model container [2022-07-12 06:29:33,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:29:33" (2/3) ... [2022-07-12 06:29:33,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752e7f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:29:33, skipping insertion in model container [2022-07-12 06:29:33,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:29:33" (3/3) ... [2022-07-12 06:29:33,585 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max.c [2022-07-12 06:29:33,595 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 06:29:33,595 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 06:29:33,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 06:29:33,643 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@25cf0101, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@734bce38 [2022-07-12 06:29:33,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 06:29:33,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-12 06:29:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 06:29:33,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:29:33,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:29:33,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:29:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:29:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 998783614, now seen corresponding path program 1 times [2022-07-12 06:29:33,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:29:33,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58847221] [2022-07-12 06:29:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:29:33,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:29:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:33,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:29:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:33,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 06:29:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:29:33,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:29:33,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58847221] [2022-07-12 06:29:33,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58847221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:29:33,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:29:33,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 06:29:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597244357] [2022-07-12 06:29:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:29:33,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 06:29:33,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:29:33,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 06:29:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 06:29:34,007 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:29:34,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:29:34,248 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2022-07-12 06:29:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 06:29:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-12 06:29:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:29:34,256 INFO L225 Difference]: With dead ends: 74 [2022-07-12 06:29:34,256 INFO L226 Difference]: Without dead ends: 35 [2022-07-12 06:29:34,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-12 06:29:34,260 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 39 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:29:34,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 119 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:29:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-12 06:29:34,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-07-12 06:29:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-12 06:29:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-07-12 06:29:34,301 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2022-07-12 06:29:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:29:34,302 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-07-12 06:29:34,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:29:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-07-12 06:29:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 06:29:34,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:29:34,304 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:29:34,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 06:29:34,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:29:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:29:34,319 INFO L85 PathProgramCache]: Analyzing trace with hash -976273983, now seen corresponding path program 1 times [2022-07-12 06:29:34,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:29:34,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145667246] [2022-07-12 06:29:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:29:34,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:29:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:29:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:29:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:29:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 06:29:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 06:29:34,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:29:34,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145667246] [2022-07-12 06:29:34,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145667246] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:29:34,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:29:34,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 06:29:34,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208284701] [2022-07-12 06:29:34,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:29:34,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 06:29:34,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:29:34,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 06:29:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-12 06:29:34,485 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 06:29:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:29:34,645 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-07-12 06:29:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 06:29:34,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-07-12 06:29:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:29:34,647 INFO L225 Difference]: With dead ends: 48 [2022-07-12 06:29:34,647 INFO L226 Difference]: Without dead ends: 37 [2022-07-12 06:29:34,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-12 06:29:34,648 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:29:34,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 108 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:29:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-12 06:29:34,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-12 06:29:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-12 06:29:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-07-12 06:29:34,654 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2022-07-12 06:29:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:29:34,655 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-07-12 06:29:34,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 06:29:34,655 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-07-12 06:29:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 06:29:34,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:29:34,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:29:34,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 06:29:34,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:29:34,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:29:34,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1376325807, now seen corresponding path program 1 times [2022-07-12 06:29:34,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:29:34,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321280645] [2022-07-12 06:29:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:29:34,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:29:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:29:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:29:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:29:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 06:29:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:29:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:29:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:29:34,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:29:34,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321280645] [2022-07-12 06:29:34,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321280645] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:29:34,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065750198] [2022-07-12 06:29:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:29:34,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:29:34,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:29:34,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:29:34,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 06:29:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 06:29:34,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:29:35,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:29:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 06:29:35,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:29:35,336 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-12 06:29:35,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 06:29:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:29:35,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065750198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:29:35,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:29:35,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2022-07-12 06:29:35,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635460421] [2022-07-12 06:29:35,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:29:35,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 06:29:35,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:29:35,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 06:29:35,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-07-12 06:29:35,368 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-12 06:29:35,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:29:35,768 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-07-12 06:29:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 06:29:35,769 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2022-07-12 06:29:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:29:35,770 INFO L225 Difference]: With dead ends: 46 [2022-07-12 06:29:35,770 INFO L226 Difference]: Without dead ends: 44 [2022-07-12 06:29:35,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 06:29:35,771 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 06:29:35,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 164 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 06:29:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-12 06:29:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-07-12 06:29:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-12 06:29:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-07-12 06:29:35,777 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 41 [2022-07-12 06:29:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:29:35,778 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-07-12 06:29:35,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-12 06:29:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-07-12 06:29:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 06:29:35,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:29:35,779 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:29:35,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 06:29:35,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:29:35,992 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:29:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:29:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2126921006, now seen corresponding path program 1 times [2022-07-12 06:29:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:29:35,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499214315] [2022-07-12 06:29:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:29:35,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:29:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:36,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:29:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:36,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:29:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:36,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:29:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:36,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 06:29:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:36,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:29:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:36,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:29:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 06:29:36,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:29:36,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499214315] [2022-07-12 06:29:36,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499214315] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:29:36,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168494406] [2022-07-12 06:29:36,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:29:36,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:29:36,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:29:36,434 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:29:36,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 06:29:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:36,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-12 06:29:36,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:29:36,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:29:36,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:29:36,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:29:36,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:29:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 06:29:36,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:29:45,063 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 06:29:51,142 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 06:29:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 06:29:51,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168494406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:29:51,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:29:51,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 13] total 29 [2022-07-12 06:29:51,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471213594] [2022-07-12 06:29:51,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:29:51,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 06:29:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:29:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 06:29:51,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=732, Unknown=1, NotChecked=0, Total=812 [2022-07-12 06:29:51,221 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-12 06:29:52,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:29:52,197 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2022-07-12 06:29:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 06:29:52,198 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 47 [2022-07-12 06:29:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:29:52,199 INFO L225 Difference]: With dead ends: 76 [2022-07-12 06:29:52,199 INFO L226 Difference]: Without dead ends: 64 [2022-07-12 06:29:52,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=239, Invalid=1922, Unknown=1, NotChecked=0, Total=2162 [2022-07-12 06:29:52,200 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 101 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 06:29:52,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 335 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 914 Invalid, 0 Unknown, 160 Unchecked, 0.5s Time] [2022-07-12 06:29:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-12 06:29:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-07-12 06:29:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-12 06:29:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-07-12 06:29:52,216 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 47 [2022-07-12 06:29:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:29:52,218 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-07-12 06:29:52,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-12 06:29:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-07-12 06:29:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 06:29:52,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:29:52,220 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:29:52,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 06:29:52,425 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,SelfDestructingSolverStorable3 [2022-07-12 06:29:52,426 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:29:52,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:29:52,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2051682644, now seen corresponding path program 1 times [2022-07-12 06:29:52,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:29:52,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845209678] [2022-07-12 06:29:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:29:52,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:29:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:52,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:29:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:52,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:29:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:52,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:29:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:52,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 06:29:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:52,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:29:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:52,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:29:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:29:52,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:29:52,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845209678] [2022-07-12 06:29:52,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845209678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:29:52,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435452385] [2022-07-12 06:29:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:29:52,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:29:52,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:29:52,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:29:52,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 06:29:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:29:52,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-12 06:29:52,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:29:52,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:29:52,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:29:52,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:29:52,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:29:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 06:29:52,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:30:01,233 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 06:30:07,306 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 06:30:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 06:30:07,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435452385] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:30:07,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:30:07,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 28 [2022-07-12 06:30:07,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435261749] [2022-07-12 06:30:07,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:30:07,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 06:30:07,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:30:07,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 06:30:07,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=686, Unknown=1, NotChecked=0, Total=756 [2022-07-12 06:30:07,393 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-07-12 06:30:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:30:08,177 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2022-07-12 06:30:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 06:30:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) Word has length 47 [2022-07-12 06:30:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:30:08,179 INFO L225 Difference]: With dead ends: 152 [2022-07-12 06:30:08,179 INFO L226 Difference]: Without dead ends: 90 [2022-07-12 06:30:08,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=212, Invalid=1949, Unknown=1, NotChecked=0, Total=2162 [2022-07-12 06:30:08,181 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 131 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:30:08,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 222 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 788 Invalid, 0 Unknown, 61 Unchecked, 0.4s Time] [2022-07-12 06:30:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-12 06:30:08,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-07-12 06:30:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (32), 15 states have call predecessors, (32), 10 states have call successors, (32) [2022-07-12 06:30:08,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2022-07-12 06:30:08,196 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 47 [2022-07-12 06:30:08,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:30:08,197 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2022-07-12 06:30:08,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-07-12 06:30:08,197 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2022-07-12 06:30:08,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-12 06:30:08,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:30:08,198 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:30:08,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 06:30:08,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:08,400 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:30:08,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:30:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash -945278837, now seen corresponding path program 2 times [2022-07-12 06:30:08,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:30:08,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429693008] [2022-07-12 06:30:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:08,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:30:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:08,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:08,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:08,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:08,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:08,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:08,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:30:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:08,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:08,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:09,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-12 06:30:09,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:30:09,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429693008] [2022-07-12 06:30:09,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429693008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:09,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671419700] [2022-07-12 06:30:09,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:30:09,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:09,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:30:09,108 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:30:09,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 06:30:09,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:30:09,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:30:09,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-12 06:30:09,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:30:09,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-07-12 06:30:09,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 13 [2022-07-12 06:30:09,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 9 [2022-07-12 06:30:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 06:30:09,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:30:10,453 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:30:10,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-07-12 06:30:10,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671419700] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:10,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:30:10,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 47 [2022-07-12 06:30:10,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839971714] [2022-07-12 06:30:10,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:30:10,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 06:30:10,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:30:10,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 06:30:10,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3142, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 06:30:10,757 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-12 06:30:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:30:13,197 INFO L93 Difference]: Finished difference Result 163 states and 287 transitions. [2022-07-12 06:30:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 06:30:13,198 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 70 [2022-07-12 06:30:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:30:13,201 INFO L225 Difference]: With dead ends: 163 [2022-07-12 06:30:13,201 INFO L226 Difference]: Without dead ends: 161 [2022-07-12 06:30:13,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=546, Invalid=7110, Unknown=0, NotChecked=0, Total=7656 [2022-07-12 06:30:13,203 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 163 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 06:30:13,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 384 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 06:30:13,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-12 06:30:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2022-07-12 06:30:13,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 96 states have (on average 1.21875) internal successors, (117), 98 states have internal predecessors, (117), 20 states have call successors, (20), 11 states have call predecessors, (20), 17 states have return successors, (86), 24 states have call predecessors, (86), 12 states have call successors, (86) [2022-07-12 06:30:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 223 transitions. [2022-07-12 06:30:13,235 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 223 transitions. Word has length 70 [2022-07-12 06:30:13,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:30:13,235 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 223 transitions. [2022-07-12 06:30:13,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-12 06:30:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 223 transitions. [2022-07-12 06:30:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-12 06:30:13,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:30:13,245 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:30:13,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 06:30:13,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:13,462 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:30:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:30:13,463 INFO L85 PathProgramCache]: Analyzing trace with hash -909256420, now seen corresponding path program 1 times [2022-07-12 06:30:13,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:30:13,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604298855] [2022-07-12 06:30:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:13,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:30:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:13,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:13,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:13,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:13,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:13,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:13,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:30:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:13,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:13,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:14,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:14,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-12 06:30:14,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:30:14,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604298855] [2022-07-12 06:30:14,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604298855] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:14,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826417770] [2022-07-12 06:30:14,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:14,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:14,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:30:14,063 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:30:14,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 06:30:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:14,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-12 06:30:14,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:30:14,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-07-12 06:30:14,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 13 [2022-07-12 06:30:14,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 9 [2022-07-12 06:30:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 06:30:14,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:30:15,758 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:30:15,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2022-07-12 06:30:16,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826417770] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:16,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:30:16,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2022-07-12 06:30:16,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085668700] [2022-07-12 06:30:16,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:30:16,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 06:30:16,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:30:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 06:30:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3737, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 06:30:16,052 INFO L87 Difference]: Start difference. First operand 134 states and 223 transitions. Second operand has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-12 06:30:21,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:30:21,053 INFO L93 Difference]: Finished difference Result 335 states and 640 transitions. [2022-07-12 06:30:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 06:30:21,054 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 71 [2022-07-12 06:30:21,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:30:21,056 INFO L225 Difference]: With dead ends: 335 [2022-07-12 06:30:21,056 INFO L226 Difference]: Without dead ends: 223 [2022-07-12 06:30:21,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2279 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=874, Invalid=11558, Unknown=0, NotChecked=0, Total=12432 [2022-07-12 06:30:21,061 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 161 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 3685 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 3769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-12 06:30:21,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 423 Invalid, 3769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3685 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-12 06:30:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-12 06:30:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 152. [2022-07-12 06:30:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 108 states have (on average 1.212962962962963) internal successors, (131), 114 states have internal predecessors, (131), 20 states have call successors, (20), 11 states have call predecessors, (20), 23 states have return successors, (122), 26 states have call predecessors, (122), 12 states have call successors, (122) [2022-07-12 06:30:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 273 transitions. [2022-07-12 06:30:21,107 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 273 transitions. Word has length 71 [2022-07-12 06:30:21,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:30:21,107 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 273 transitions. [2022-07-12 06:30:21,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-12 06:30:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 273 transitions. [2022-07-12 06:30:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-12 06:30:21,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:30:21,109 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:30:21,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 06:30:21,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:21,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:30:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:30:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1931785932, now seen corresponding path program 2 times [2022-07-12 06:30:21,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:30:21,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204315562] [2022-07-12 06:30:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:21,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:30:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:21,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:21,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:21,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:21,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:21,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:21,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:30:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:21,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:21,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:21,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:21,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 06:30:21,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:30:21,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204315562] [2022-07-12 06:30:21,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204315562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:21,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272312615] [2022-07-12 06:30:21,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:30:21,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:21,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:30:21,490 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:30:21,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 06:30:21,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:30:21,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:30:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 06:30:21,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:30:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 06:30:21,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:30:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 06:30:22,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272312615] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:30:22,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:30:22,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 21 [2022-07-12 06:30:22,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412145172] [2022-07-12 06:30:22,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:30:22,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 06:30:22,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:30:22,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 06:30:22,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-07-12 06:30:22,013 INFO L87 Difference]: Start difference. First operand 152 states and 273 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-12 06:30:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:30:23,036 INFO L93 Difference]: Finished difference Result 305 states and 646 transitions. [2022-07-12 06:30:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 06:30:23,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 71 [2022-07-12 06:30:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:30:23,038 INFO L225 Difference]: With dead ends: 305 [2022-07-12 06:30:23,039 INFO L226 Difference]: Without dead ends: 175 [2022-07-12 06:30:23,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 06:30:23,041 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 109 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:30:23,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 297 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 06:30:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-07-12 06:30:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 158. [2022-07-12 06:30:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 113 states have (on average 1.168141592920354) internal successors, (132), 118 states have internal predecessors, (132), 20 states have call successors, (20), 11 states have call predecessors, (20), 24 states have return successors, (129), 28 states have call predecessors, (129), 12 states have call successors, (129) [2022-07-12 06:30:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 281 transitions. [2022-07-12 06:30:23,071 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 281 transitions. Word has length 71 [2022-07-12 06:30:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:30:23,071 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 281 transitions. [2022-07-12 06:30:23,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-12 06:30:23,072 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 281 transitions. [2022-07-12 06:30:23,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-12 06:30:23,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:30:23,074 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:30:23,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 06:30:23,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:23,302 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:30:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:30:23,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1914561797, now seen corresponding path program 1 times [2022-07-12 06:30:23,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:30:23,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666739909] [2022-07-12 06:30:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:23,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:30:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:23,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:23,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:23,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:23,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:23,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:23,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:30:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:23,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:23,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:24,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:24,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-12 06:30:24,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:30:24,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666739909] [2022-07-12 06:30:24,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666739909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:24,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860679515] [2022-07-12 06:30:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:24,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:24,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:30:24,040 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:30:24,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 06:30:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:24,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-12 06:30:24,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:30:24,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-12 06:30:24,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-12 06:30:25,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:30:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 06:30:25,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:30:25,954 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:30:25,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-07-12 06:30:26,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860679515] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:26,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:30:26,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 54 [2022-07-12 06:30:26,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88866918] [2022-07-12 06:30:26,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:30:26,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-12 06:30:26,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:30:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-12 06:30:26,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4625, Unknown=0, NotChecked=0, Total=4830 [2022-07-12 06:30:26,448 INFO L87 Difference]: Start difference. First operand 158 states and 281 transitions. Second operand has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-12 06:30:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:30:29,659 INFO L93 Difference]: Finished difference Result 191 states and 326 transitions. [2022-07-12 06:30:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 06:30:29,660 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 72 [2022-07-12 06:30:29,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:30:29,672 INFO L225 Difference]: With dead ends: 191 [2022-07-12 06:30:29,672 INFO L226 Difference]: Without dead ends: 189 [2022-07-12 06:30:29,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=739, Invalid=10181, Unknown=0, NotChecked=0, Total=10920 [2022-07-12 06:30:29,676 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 172 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:30:29,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 381 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 06:30:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-12 06:30:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 153. [2022-07-12 06:30:29,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 109 states have (on average 1.165137614678899) internal successors, (127), 114 states have internal predecessors, (127), 20 states have call successors, (20), 11 states have call predecessors, (20), 23 states have return successors, (123), 27 states have call predecessors, (123), 12 states have call successors, (123) [2022-07-12 06:30:29,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 270 transitions. [2022-07-12 06:30:29,706 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 270 transitions. Word has length 72 [2022-07-12 06:30:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:30:29,707 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 270 transitions. [2022-07-12 06:30:29,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-12 06:30:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 270 transitions. [2022-07-12 06:30:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-12 06:30:29,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:30:29,709 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:30:29,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-12 06:30:29,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:29,926 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:30:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:30:29,926 INFO L85 PathProgramCache]: Analyzing trace with hash 872853690, now seen corresponding path program 1 times [2022-07-12 06:30:29,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:30:29,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244628774] [2022-07-12 06:30:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:29,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:30:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:30,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:30,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:30,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:30,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:30,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:30,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:30:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:30,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:30,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:30,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:30,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 06:30:30,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:30:30,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244628774] [2022-07-12 06:30:30,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244628774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:30,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699124517] [2022-07-12 06:30:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:30,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:30,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:30:30,528 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:30:30,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 06:30:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:30,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-12 06:30:30,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:30:30,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-12 06:30:30,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-12 06:30:31,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:30:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 06:30:31,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:30:31,381 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-12 06:30:31,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 06:30:31,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699124517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:31,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:30:31,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 43 [2022-07-12 06:30:31,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85306484] [2022-07-12 06:30:31,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:30:31,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 06:30:31,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:30:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 06:30:31,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 06:30:31,475 INFO L87 Difference]: Start difference. First operand 153 states and 270 transitions. Second operand has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2022-07-12 06:30:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:30:32,534 INFO L93 Difference]: Finished difference Result 189 states and 309 transitions. [2022-07-12 06:30:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 06:30:32,534 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) Word has length 72 [2022-07-12 06:30:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:30:32,536 INFO L225 Difference]: With dead ends: 189 [2022-07-12 06:30:32,536 INFO L226 Difference]: Without dead ends: 187 [2022-07-12 06:30:32,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=361, Invalid=4469, Unknown=0, NotChecked=0, Total=4830 [2022-07-12 06:30:32,539 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 94 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 06:30:32,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 337 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 06:30:32,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-12 06:30:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2022-07-12 06:30:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 98 states have (on average 1.183673469387755) internal successors, (116), 99 states have internal predecessors, (116), 19 states have call successors, (19), 10 states have call predecessors, (19), 18 states have return successors, (93), 26 states have call predecessors, (93), 12 states have call successors, (93) [2022-07-12 06:30:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 228 transitions. [2022-07-12 06:30:32,555 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 228 transitions. Word has length 72 [2022-07-12 06:30:32,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:30:32,556 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 228 transitions. [2022-07-12 06:30:32,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2022-07-12 06:30:32,556 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 228 transitions. [2022-07-12 06:30:32,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 06:30:32,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:30:32,557 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:30:32,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 06:30:32,775 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,SelfDestructingSolverStorable9 [2022-07-12 06:30:32,775 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:30:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:30:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash -666655302, now seen corresponding path program 2 times [2022-07-12 06:30:32,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:30:32,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142872662] [2022-07-12 06:30:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:32,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:30:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:32,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:32,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:32,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:33,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 06:30:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:33,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:33,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:33,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:33,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-12 06:30:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 06:30:33,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:30:33,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142872662] [2022-07-12 06:30:33,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142872662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:33,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044598557] [2022-07-12 06:30:33,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:30:33,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:33,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:30:33,025 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:30:33,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 06:30:33,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:30:33,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:30:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 06:30:33,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:30:33,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:30:33,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:30:33,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-12 06:30:33,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-12 06:30:33,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:30:33,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:30:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-12 06:30:33,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:30:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-12 06:30:33,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044598557] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:30:33,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:30:33,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 25 [2022-07-12 06:30:33,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228740658] [2022-07-12 06:30:33,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:30:33,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 06:30:33,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:30:33,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 06:30:33,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-07-12 06:30:33,755 INFO L87 Difference]: Start difference. First operand 136 states and 228 transitions. Second operand has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-12 06:30:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:30:33,992 INFO L93 Difference]: Finished difference Result 243 states and 415 transitions. [2022-07-12 06:30:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 06:30:33,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) Word has length 60 [2022-07-12 06:30:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:30:33,994 INFO L225 Difference]: With dead ends: 243 [2022-07-12 06:30:33,994 INFO L226 Difference]: Without dead ends: 141 [2022-07-12 06:30:33,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-07-12 06:30:33,996 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 26 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:30:33,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 482 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-07-12 06:30:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-12 06:30:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-07-12 06:30:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 102 states have internal predecessors, (119), 20 states have call successors, (20), 10 states have call predecessors, (20), 19 states have return successors, (99), 28 states have call predecessors, (99), 13 states have call successors, (99) [2022-07-12 06:30:34,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 238 transitions. [2022-07-12 06:30:34,005 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 238 transitions. Word has length 60 [2022-07-12 06:30:34,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:30:34,006 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 238 transitions. [2022-07-12 06:30:34,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-12 06:30:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 238 transitions. [2022-07-12 06:30:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-12 06:30:34,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:30:34,007 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:30:34,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 06:30:34,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:34,225 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:30:34,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:30:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1479239555, now seen corresponding path program 3 times [2022-07-12 06:30:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:30:34,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631226087] [2022-07-12 06:30:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:34,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:30:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:34,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:34,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:34,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:34,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:34,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-12 06:30:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:34,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:30:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:34,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:34,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:34,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:34,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-12 06:30:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-12 06:30:34,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:30:34,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631226087] [2022-07-12 06:30:34,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631226087] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:34,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694440255] [2022-07-12 06:30:34,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:30:34,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:34,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:30:34,640 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:30:34,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 06:30:34,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 06:30:34,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:30:34,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-12 06:30:34,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:30:34,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-07-12 06:30:34,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:30:34,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-12 06:30:34,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-12 06:30:34,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:30:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 06:30:34,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:30:35,157 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-12 06:30:35,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 06:30:35,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694440255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:35,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:30:35,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 30 [2022-07-12 06:30:35,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903139357] [2022-07-12 06:30:35,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:30:35,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 06:30:35,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:30:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 06:30:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 06:30:35,257 INFO L87 Difference]: Start difference. First operand 141 states and 238 transitions. Second operand has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-12 06:30:36,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:30:36,015 INFO L93 Difference]: Finished difference Result 168 states and 272 transitions. [2022-07-12 06:30:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 06:30:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) Word has length 70 [2022-07-12 06:30:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:30:36,017 INFO L225 Difference]: With dead ends: 168 [2022-07-12 06:30:36,017 INFO L226 Difference]: Without dead ends: 166 [2022-07-12 06:30:36,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=284, Invalid=2908, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 06:30:36,018 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:30:36,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 265 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 06:30:36,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-12 06:30:36,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2022-07-12 06:30:36,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 115 states have internal predecessors, (133), 23 states have call successors, (23), 12 states have call predecessors, (23), 20 states have return successors, (105), 30 states have call predecessors, (105), 13 states have call successors, (105) [2022-07-12 06:30:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 261 transitions. [2022-07-12 06:30:36,028 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 261 transitions. Word has length 70 [2022-07-12 06:30:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:30:36,029 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 261 transitions. [2022-07-12 06:30:36,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-12 06:30:36,029 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 261 transitions. [2022-07-12 06:30:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-12 06:30:36,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:30:36,030 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:30:36,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 06:30:36,247 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,SelfDestructingSolverStorable11 [2022-07-12 06:30:36,248 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:30:36,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:30:36,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1086227410, now seen corresponding path program 1 times [2022-07-12 06:30:36,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:30:36,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462499032] [2022-07-12 06:30:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:36,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:30:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:36,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:36,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:36,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:36,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:36,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-12 06:30:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:36,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:30:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:36,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:36,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:36,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:36,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-12 06:30:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-12 06:30:36,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:30:36,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462499032] [2022-07-12 06:30:36,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462499032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:36,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976894634] [2022-07-12 06:30:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:36,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:36,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:30:36,806 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:30:36,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 06:30:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:36,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-12 06:30:36,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:30:36,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:30:36,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:30:37,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-12 06:30:37,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-12 06:30:37,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:30:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 06:30:37,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:30:38,524 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-12 06:30:38,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2022-07-12 06:30:38,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976894634] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:38,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:30:38,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 47 [2022-07-12 06:30:38,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889663304] [2022-07-12 06:30:38,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:30:38,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 06:30:38,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:30:38,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 06:30:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 06:30:38,778 INFO L87 Difference]: Start difference. First operand 158 states and 261 transitions. Second operand has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-12 06:30:40,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:30:40,951 INFO L93 Difference]: Finished difference Result 202 states and 370 transitions. [2022-07-12 06:30:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 06:30:40,951 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 71 [2022-07-12 06:30:40,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:30:40,953 INFO L225 Difference]: With dead ends: 202 [2022-07-12 06:30:40,953 INFO L226 Difference]: Without dead ends: 200 [2022-07-12 06:30:40,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=546, Invalid=7644, Unknown=0, NotChecked=0, Total=8190 [2022-07-12 06:30:40,954 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 114 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 2131 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 06:30:40,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 403 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2131 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 06:30:40,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-12 06:30:40,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 169. [2022-07-12 06:30:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 121 states have (on average 1.165289256198347) internal successors, (141), 123 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 22 states have return successors, (136), 33 states have call predecessors, (136), 15 states have call successors, (136) [2022-07-12 06:30:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 302 transitions. [2022-07-12 06:30:40,966 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 302 transitions. Word has length 71 [2022-07-12 06:30:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:30:40,966 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 302 transitions. [2022-07-12 06:30:40,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-12 06:30:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 302 transitions. [2022-07-12 06:30:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 06:30:40,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:30:40,967 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:30:40,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 06:30:41,168 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,SelfDestructingSolverStorable12 [2022-07-12 06:30:41,168 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:30:41,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:30:41,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1479346186, now seen corresponding path program 1 times [2022-07-12 06:30:41,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:30:41,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379466018] [2022-07-12 06:30:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:41,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:30:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:41,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:41,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:41,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:41,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:41,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:41,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:30:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:41,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:41,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:41,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:41,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 06:30:41,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:30:41,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379466018] [2022-07-12 06:30:41,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379466018] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:41,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572568455] [2022-07-12 06:30:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:41,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:30:41,656 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:30:41,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 06:30:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:41,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 116 conjunts are in the unsatisfiable core [2022-07-12 06:30:41,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:30:41,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 06:30:41,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:30:41,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:30:42,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-12 06:30:42,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-12 06:30:42,065 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 06:30:42,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 06:30:42,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-12 06:30:42,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 06:30:42,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 06:30:42,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 06:30:42,953 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:30:42,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2022-07-12 06:30:42,959 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 06:30:42,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-12 06:30:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 06:30:42,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:30:43,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 06:30:43,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 06:30:45,791 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| 0 (store (select |c_#memory_$Pointer$.offset| 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) (+ 4 |c_nondet_tree_#res.offset|)) 0)) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (store |c_#memory_$Pointer$.base| 0 (store (select |c_#memory_$Pointer$.base| 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) (+ 4 |c_nondet_tree_#res.offset|)) 0)) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int)) (or (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) (+ 4 |c_nondet_tree_#res.offset|)) 0)))) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) (+ 4 |c_nondet_tree_#res.offset|)) 0)) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0))) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int)) (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) (+ 4 |c_nondet_tree_#res.offset|)) 0)))) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int)) (or (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) (+ 4 |c_nondet_tree_#res.offset|)) 0))))) is different from false [2022-07-12 06:30:47,839 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1448 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int)) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base) (+ 8 c_nondet_tree_~n~0.offset) v_ArrVal_1448)))) (store .cse0 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse0 v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) (+ 4 c_nondet_tree_~n~0.offset)) 0)))) (forall ((v_ArrVal_1450 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int)) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base) (+ 8 c_nondet_tree_~n~0.offset) v_ArrVal_1450)))) (store .cse1 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse1 v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) (+ 4 c_nondet_tree_~n~0.offset)) 0)) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0))) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int) (v_ArrVal_1450 Int)) (or (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base) (+ 8 c_nondet_tree_~n~0.offset) v_ArrVal_1450)))) (store .cse2 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse2 v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) (+ 4 c_nondet_tree_~n~0.offset)) 0)))) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int) (v_ArrVal_1448 Int)) (or (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base) (+ 8 c_nondet_tree_~n~0.offset) v_ArrVal_1448)))) (store .cse3 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse3 v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) (+ 4 c_nondet_tree_~n~0.offset)) 0)))) (forall ((v_ArrVal_1450 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base) (+ 8 c_nondet_tree_~n~0.offset) v_ArrVal_1450)))) (store .cse4 0 (store (select .cse4 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) (+ 4 c_nondet_tree_~n~0.offset)) 0)) (forall ((v_ArrVal_1448 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base) (+ 8 c_nondet_tree_~n~0.offset) v_ArrVal_1448)))) (store .cse5 0 (store (select .cse5 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) (+ 4 c_nondet_tree_~n~0.offset)) 0))) is different from false [2022-07-12 06:30:47,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572568455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:47,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:30:47,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 46 [2022-07-12 06:30:47,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242078076] [2022-07-12 06:30:47,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:30:47,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 06:30:47,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:30:47,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 06:30:47,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2910, Unknown=2, NotChecked=218, Total=3306 [2022-07-12 06:30:47,889 INFO L87 Difference]: Start difference. First operand 169 states and 302 transitions. Second operand has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2022-07-12 06:30:50,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:30:50,528 INFO L93 Difference]: Finished difference Result 452 states and 844 transitions. [2022-07-12 06:30:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 06:30:50,529 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) Word has length 76 [2022-07-12 06:30:50,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:30:50,532 INFO L225 Difference]: With dead ends: 452 [2022-07-12 06:30:50,532 INFO L226 Difference]: Without dead ends: 440 [2022-07-12 06:30:50,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=648, Invalid=10488, Unknown=2, NotChecked=418, Total=11556 [2022-07-12 06:30:50,533 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 123 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 2595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 695 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 06:30:50,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 672 Invalid, 2595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1830 Invalid, 0 Unknown, 695 Unchecked, 0.9s Time] [2022-07-12 06:30:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-07-12 06:30:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2022-07-12 06:30:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 248 states have (on average 1.189516129032258) internal successors, (295), 254 states have internal predecessors, (295), 38 states have call successors, (38), 21 states have call predecessors, (38), 52 states have return successors, (326), 63 states have call predecessors, (326), 22 states have call successors, (326) [2022-07-12 06:30:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 659 transitions. [2022-07-12 06:30:50,557 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 659 transitions. Word has length 76 [2022-07-12 06:30:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:30:50,558 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 659 transitions. [2022-07-12 06:30:50,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2022-07-12 06:30:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 659 transitions. [2022-07-12 06:30:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-12 06:30:50,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:30:50,561 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:30:50,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-12 06:30:50,775 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,SelfDestructingSolverStorable13 [2022-07-12 06:30:50,775 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:30:50,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:30:50,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1523837565, now seen corresponding path program 1 times [2022-07-12 06:30:50,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:30:50,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103670785] [2022-07-12 06:30:50,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:50,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:30:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:50,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:50,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:50,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:50,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:50,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:50,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:30:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:50,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:50,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:50,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:50,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 06:30:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 06:30:50,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:30:50,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103670785] [2022-07-12 06:30:50,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103670785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:50,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812803126] [2022-07-12 06:30:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:50,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:50,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:30:50,976 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:30:50,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 06:30:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:51,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 06:30:51,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:30:51,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 06:30:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 06:30:51,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:30:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 06:30:51,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812803126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:30:51,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:30:51,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 30 [2022-07-12 06:30:51,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345031582] [2022-07-12 06:30:51,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:30:51,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 06:30:51,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:30:51,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 06:30:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-07-12 06:30:51,701 INFO L87 Difference]: Start difference. First operand 339 states and 659 transitions. Second operand has 30 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-12 06:30:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:30:52,201 INFO L93 Difference]: Finished difference Result 490 states and 940 transitions. [2022-07-12 06:30:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 06:30:52,202 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) Word has length 72 [2022-07-12 06:30:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:30:52,205 INFO L225 Difference]: With dead ends: 490 [2022-07-12 06:30:52,205 INFO L226 Difference]: Without dead ends: 463 [2022-07-12 06:30:52,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 06:30:52,206 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 57 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 06:30:52,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 367 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 426 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2022-07-12 06:30:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-07-12 06:30:52,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 365. [2022-07-12 06:30:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 268 states have (on average 1.2014925373134329) internal successors, (322), 271 states have internal predecessors, (322), 41 states have call successors, (41), 23 states have call predecessors, (41), 55 states have return successors, (266), 70 states have call predecessors, (266), 25 states have call successors, (266) [2022-07-12 06:30:52,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 629 transitions. [2022-07-12 06:30:52,230 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 629 transitions. Word has length 72 [2022-07-12 06:30:52,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:30:52,230 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 629 transitions. [2022-07-12 06:30:52,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-12 06:30:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 629 transitions. [2022-07-12 06:30:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-12 06:30:52,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:30:52,233 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:30:52,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 06:30:52,450 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,SelfDestructingSolverStorable14 [2022-07-12 06:30:52,451 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:30:52,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:30:52,451 INFO L85 PathProgramCache]: Analyzing trace with hash -700730293, now seen corresponding path program 3 times [2022-07-12 06:30:52,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:30:52,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99334693] [2022-07-12 06:30:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:30:52,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:30:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:30:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:30:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:30:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:30:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:30:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:30:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-12 06:30:52,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:30:52,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99334693] [2022-07-12 06:30:52,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99334693] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:30:52,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097946964] [2022-07-12 06:30:52,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:30:52,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:30:52,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:30:52,947 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:30:52,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 06:30:53,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 06:30:53,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:30:53,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-12 06:30:53,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:30:53,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 06:30:53,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-07-12 06:30:53,372 INFO L356 Elim1Store]: treesize reduction 31, result has 44.6 percent of original size [2022-07-12 06:30:53,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 37 [2022-07-12 06:30:55,456 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27| Int)) (and (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27|) 8) 0) (= |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27|) 8)))) (exists ((|v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27| Int)) (not (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27|) 8)) (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27|) 8))) 0)))) is different from true [2022-07-12 06:31:03,652 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 06:31:12,065 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 06:31:20,122 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 06:31:20,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 06:31:20,748 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 06:31:20,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-07-12 06:31:20,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:31:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 29 proven. 31 refuted. 0 times theorem prover too weak. 54 trivial. 18 not checked. [2022-07-12 06:31:20,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:31:23,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097946964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:31:23,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:31:23,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 44 [2022-07-12 06:31:23,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417442157] [2022-07-12 06:31:23,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:31:23,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 06:31:23,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:31:23,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 06:31:23,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2707, Unknown=5, NotChecked=104, Total=2970 [2022-07-12 06:31:23,618 INFO L87 Difference]: Start difference. First operand 365 states and 629 transitions. Second operand has 44 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (24), 7 states have call predecessors, (24), 13 states have return successors, (19), 16 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-12 06:31:40,132 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 06:31:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:31:41,814 INFO L93 Difference]: Finished difference Result 871 states and 1560 transitions. [2022-07-12 06:31:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-12 06:31:41,815 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (24), 7 states have call predecessors, (24), 13 states have return successors, (19), 16 states have call predecessors, (19), 10 states have call successors, (19) Word has length 86 [2022-07-12 06:31:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:31:41,820 INFO L225 Difference]: With dead ends: 871 [2022-07-12 06:31:41,820 INFO L226 Difference]: Without dead ends: 778 [2022-07-12 06:31:41,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=461, Invalid=8094, Unknown=5, NotChecked=182, Total=8742 [2022-07-12 06:31:41,821 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 152 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 06:31:41,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 933 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2134 Invalid, 0 Unknown, 697 Unchecked, 0.9s Time] [2022-07-12 06:31:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-07-12 06:31:41,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 650. [2022-07-12 06:31:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 489 states have (on average 1.2269938650306749) internal successors, (600), 489 states have internal predecessors, (600), 54 states have call successors, (54), 32 states have call predecessors, (54), 106 states have return successors, (545), 128 states have call predecessors, (545), 30 states have call successors, (545) [2022-07-12 06:31:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1199 transitions. [2022-07-12 06:31:41,871 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1199 transitions. Word has length 86 [2022-07-12 06:31:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:31:41,871 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 1199 transitions. [2022-07-12 06:31:41,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (24), 7 states have call predecessors, (24), 13 states have return successors, (19), 16 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-12 06:31:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1199 transitions. [2022-07-12 06:31:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-12 06:31:41,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:31:41,875 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:31:41,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 06:31:42,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:31:42,091 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:31:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:31:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash 215586468, now seen corresponding path program 2 times [2022-07-12 06:31:42,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:31:42,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321632863] [2022-07-12 06:31:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:31:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:31:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:31:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:31:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:31:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:31:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:31:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:31:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-12 06:31:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:31:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:31:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 23 proven. 69 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-12 06:31:42,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:31:42,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321632863] [2022-07-12 06:31:42,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321632863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:31:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53398038] [2022-07-12 06:31:42,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:31:42,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:31:42,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:31:42,777 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:31:42,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 06:31:42,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:31:42,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:31:42,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-12 06:31:42,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:31:42,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 06:31:43,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:31:43,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:31:43,152 WARN L855 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int) (v_ArrVal_2032 (Array Int Int)) (v_ArrVal_2031 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_2031)) (= (select |c_old(#valid)| nondet_tree_~n~0.base) 0) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_2032)))) is different from true [2022-07-12 06:31:43,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 06:31:43,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 06:31:43,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 06:31:43,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 06:31:43,176 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 06:31:43,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 06:31:43,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-12 06:31:43,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-12 06:31:43,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:31:43,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:31:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 177 trivial. 8 not checked. [2022-07-12 06:31:43,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:31:43,978 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 06:31:43,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2022-07-12 06:31:43,982 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 06:31:43,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2022-07-12 06:31:44,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53398038] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:31:44,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:31:44,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2022-07-12 06:31:44,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665418745] [2022-07-12 06:31:44,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:31:44,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 06:31:44,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:31:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 06:31:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1364, Unknown=1, NotChecked=74, Total=1560 [2022-07-12 06:31:44,222 INFO L87 Difference]: Start difference. First operand 650 states and 1199 transitions. Second operand has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 14 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-12 06:31:45,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:31:45,565 INFO L93 Difference]: Finished difference Result 755 states and 1340 transitions. [2022-07-12 06:31:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 06:31:45,565 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 14 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) Word has length 97 [2022-07-12 06:31:45,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:31:45,569 INFO L225 Difference]: With dead ends: 755 [2022-07-12 06:31:45,570 INFO L226 Difference]: Without dead ends: 686 [2022-07-12 06:31:45,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=365, Invalid=3420, Unknown=1, NotChecked=120, Total=3906 [2022-07-12 06:31:45,571 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 06:31:45,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 534 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1115 Invalid, 0 Unknown, 258 Unchecked, 0.6s Time] [2022-07-12 06:31:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-07-12 06:31:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 600. [2022-07-12 06:31:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 452 states have (on average 1.2234513274336283) internal successors, (553), 448 states have internal predecessors, (553), 54 states have call successors, (54), 32 states have call predecessors, (54), 93 states have return successors, (459), 119 states have call predecessors, (459), 30 states have call successors, (459) [2022-07-12 06:31:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1066 transitions. [2022-07-12 06:31:45,609 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1066 transitions. Word has length 97 [2022-07-12 06:31:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:31:45,610 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 1066 transitions. [2022-07-12 06:31:45,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 14 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-12 06:31:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1066 transitions. [2022-07-12 06:31:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-12 06:31:45,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:31:45,613 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:31:45,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 06:31:45,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 06:31:45,828 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:31:45,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:31:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash 191480931, now seen corresponding path program 2 times [2022-07-12 06:31:45,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:31:45,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852185417] [2022-07-12 06:31:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:31:45,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:31:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:45,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:46,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:31:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:46,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:31:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:46,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:31:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:46,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-12 06:31:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:46,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:31:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:46,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:46,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:46,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:31:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:46,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 06:31:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-12 06:31:46,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:31:46,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852185417] [2022-07-12 06:31:46,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852185417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:31:46,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771229541] [2022-07-12 06:31:46,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:31:46,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:31:46,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:31:46,384 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:31:46,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 06:31:46,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:31:46,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:31:46,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-12 06:31:46,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:31:46,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:31:46,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:31:47,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-12 06:31:47,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-12 06:31:47,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:31:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 06:31:47,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:31:48,208 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-12 06:31:48,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2022-07-12 06:31:48,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771229541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:31:48,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:31:48,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 51 [2022-07-12 06:31:48,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456953160] [2022-07-12 06:31:48,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:31:48,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 06:31:48,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:31:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 06:31:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4618, Unknown=0, NotChecked=0, Total=4830 [2022-07-12 06:31:48,582 INFO L87 Difference]: Start difference. First operand 600 states and 1066 transitions. Second operand has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-12 06:31:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:31:53,296 INFO L93 Difference]: Finished difference Result 893 states and 1845 transitions. [2022-07-12 06:31:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-12 06:31:53,297 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 72 [2022-07-12 06:31:53,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:31:53,303 INFO L225 Difference]: With dead ends: 893 [2022-07-12 06:31:53,303 INFO L226 Difference]: Without dead ends: 891 [2022-07-12 06:31:53,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3454 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1095, Invalid=14405, Unknown=0, NotChecked=0, Total=15500 [2022-07-12 06:31:53,306 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 158 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 3835 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 3962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-12 06:31:53,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 472 Invalid, 3962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3835 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-12 06:31:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-07-12 06:31:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 589. [2022-07-12 06:31:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 445 states have (on average 1.2247191011235956) internal successors, (545), 440 states have internal predecessors, (545), 52 states have call successors, (52), 32 states have call predecessors, (52), 91 states have return successors, (438), 116 states have call predecessors, (438), 28 states have call successors, (438) [2022-07-12 06:31:53,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1035 transitions. [2022-07-12 06:31:53,365 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1035 transitions. Word has length 72 [2022-07-12 06:31:53,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:31:53,365 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 1035 transitions. [2022-07-12 06:31:53,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-12 06:31:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1035 transitions. [2022-07-12 06:31:53,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-12 06:31:53,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:31:53,370 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:31:53,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 06:31:53,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 06:31:53,610 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:31:53,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:31:53,610 INFO L85 PathProgramCache]: Analyzing trace with hash -118617124, now seen corresponding path program 4 times [2022-07-12 06:31:53,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:31:53,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679192452] [2022-07-12 06:31:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:31:53,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:31:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:53,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:53,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:31:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:53,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:31:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:53,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:31:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:53,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:31:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:53,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:31:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:53,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:53,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:31:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:53,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:53,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:31:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:54,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:54,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:31:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-12 06:31:54,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:31:54,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679192452] [2022-07-12 06:31:54,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679192452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:31:54,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391467024] [2022-07-12 06:31:54,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:31:54,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:31:54,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:31:54,026 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:31:54,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 06:31:54,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:31:54,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:31:54,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-12 06:31:54,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:31:54,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 06:31:54,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:31:54,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:31:54,374 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 06:31:54,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 06:31:54,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 06:31:54,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-12 06:31:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-12 06:31:55,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:31:55,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391467024] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:31:55,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:31:55,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2022-07-12 06:31:55,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292907872] [2022-07-12 06:31:55,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:31:55,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 06:31:55,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:31:55,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 06:31:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 06:31:55,590 INFO L87 Difference]: Start difference. First operand 589 states and 1035 transitions. Second operand has 35 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 28 states have internal predecessors, (75), 16 states have call successors, (23), 5 states have call predecessors, (23), 14 states have return successors, (23), 21 states have call predecessors, (23), 15 states have call successors, (23) [2022-07-12 06:31:56,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:31:56,948 INFO L93 Difference]: Finished difference Result 1008 states and 1863 transitions. [2022-07-12 06:31:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 06:31:56,948 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 28 states have internal predecessors, (75), 16 states have call successors, (23), 5 states have call predecessors, (23), 14 states have return successors, (23), 21 states have call predecessors, (23), 15 states have call successors, (23) Word has length 89 [2022-07-12 06:31:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:31:56,957 INFO L225 Difference]: With dead ends: 1008 [2022-07-12 06:31:56,958 INFO L226 Difference]: Without dead ends: 852 [2022-07-12 06:31:56,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=338, Invalid=3568, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 06:31:56,960 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 85 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:31:56,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 591 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 948 Invalid, 0 Unknown, 249 Unchecked, 0.4s Time] [2022-07-12 06:31:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-07-12 06:31:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 642. [2022-07-12 06:31:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 485 states have (on average 1.2288659793814434) internal successors, (596), 482 states have internal predecessors, (596), 52 states have call successors, (52), 32 states have call predecessors, (52), 104 states have return successors, (519), 127 states have call predecessors, (519), 28 states have call successors, (519) [2022-07-12 06:31:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1167 transitions. [2022-07-12 06:31:57,013 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1167 transitions. Word has length 89 [2022-07-12 06:31:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:31:57,013 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 1167 transitions. [2022-07-12 06:31:57,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 28 states have internal predecessors, (75), 16 states have call successors, (23), 5 states have call predecessors, (23), 14 states have return successors, (23), 21 states have call predecessors, (23), 15 states have call successors, (23) [2022-07-12 06:31:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1167 transitions. [2022-07-12 06:31:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-12 06:31:57,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:31:57,018 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:31:57,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 06:31:57,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:31:57,250 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:31:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:31:57,250 INFO L85 PathProgramCache]: Analyzing trace with hash -560347655, now seen corresponding path program 5 times [2022-07-12 06:31:57,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:31:57,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106385745] [2022-07-12 06:31:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:31:57,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:31:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:57,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:57,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:31:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:57,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:31:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:57,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:31:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:57,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:31:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:57,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:31:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:57,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:31:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:57,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:31:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:57,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:31:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:57,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:57,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:31:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:58,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:31:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:58,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:31:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:31:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 50 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-12 06:31:58,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:31:58,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106385745] [2022-07-12 06:31:58,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106385745] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:31:58,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238410669] [2022-07-12 06:31:58,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:31:58,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:31:58,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:31:58,068 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:31:58,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 06:31:58,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 06:31:58,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:31:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-12 06:31:58,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:31:59,709 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:31:59,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 65 [2022-07-12 06:31:59,714 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:31:59,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 48 [2022-07-12 06:31:59,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 9 [2022-07-12 06:31:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-07-12 06:31:59,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:32:00,745 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:32:00,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 68 [2022-07-12 06:32:01,177 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:32:01,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 56 [2022-07-12 06:32:01,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238410669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:01,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:32:01,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 56 [2022-07-12 06:32:01,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104952278] [2022-07-12 06:32:01,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:32:01,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-12 06:32:01,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:01,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-12 06:32:01,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4635, Unknown=0, NotChecked=0, Total=4830 [2022-07-12 06:32:01,423 INFO L87 Difference]: Start difference. First operand 642 states and 1167 transitions. Second operand has 56 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 40 states have internal predecessors, (87), 18 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (21), 17 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-12 06:32:05,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:05,104 INFO L93 Difference]: Finished difference Result 1019 states and 2036 transitions. [2022-07-12 06:32:05,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-12 06:32:05,104 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 40 states have internal predecessors, (87), 18 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (21), 17 states have call predecessors, (21), 12 states have call successors, (21) Word has length 99 [2022-07-12 06:32:05,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:05,110 INFO L225 Difference]: With dead ends: 1019 [2022-07-12 06:32:05,110 INFO L226 Difference]: Without dead ends: 1017 [2022-07-12 06:32:05,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2999 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1082, Invalid=14418, Unknown=0, NotChecked=0, Total=15500 [2022-07-12 06:32:05,113 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 160 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 3103 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 3613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:05,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 476 Invalid, 3613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 3103 Invalid, 0 Unknown, 417 Unchecked, 1.1s Time] [2022-07-12 06:32:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-07-12 06:32:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 782. [2022-07-12 06:32:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 586 states have (on average 1.226962457337884) internal successors, (719), 598 states have internal predecessors, (719), 58 states have call successors, (58), 36 states have call predecessors, (58), 137 states have return successors, (678), 147 states have call predecessors, (678), 28 states have call successors, (678) [2022-07-12 06:32:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1455 transitions. [2022-07-12 06:32:05,178 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1455 transitions. Word has length 99 [2022-07-12 06:32:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:05,178 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 1455 transitions. [2022-07-12 06:32:05,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 40 states have internal predecessors, (87), 18 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (21), 17 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-12 06:32:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1455 transitions. [2022-07-12 06:32:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-12 06:32:05,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:05,184 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:05,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:05,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:05,404 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:05,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:05,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1679039551, now seen corresponding path program 3 times [2022-07-12 06:32:05,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:05,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168523567] [2022-07-12 06:32:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:05,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:05,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:05,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:05,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:32:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:32:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:32:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:32:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:32:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-12 06:32:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:32:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:32:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 1 proven. 54 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-07-12 06:32:07,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:07,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168523567] [2022-07-12 06:32:07,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168523567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:07,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75224553] [2022-07-12 06:32:07,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:32:07,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:07,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:07,555 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:32:07,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 06:32:08,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-12 06:32:08,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:32:08,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 134 conjunts are in the unsatisfiable core [2022-07-12 06:32:08,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:08,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 06:32:08,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:32:08,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:32:08,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 06:32:08,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 06:32:08,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 20 [2022-07-12 06:32:08,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 20 [2022-07-12 06:32:08,520 WARN L855 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int) (v_arrayElimArr_6 (Array Int Int)) (v_arrayElimArr_5 (Array Int Int))) (and (= (select v_arrayElimArr_6 4) 0) (= (select v_arrayElimArr_5 4) 0) (= (select v_arrayElimArr_6 8) 0) (= (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_arrayElimArr_6) |c_#memory_$Pointer$.offset|) (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_arrayElimArr_5) |c_#memory_$Pointer$.base|))) is different from true [2022-07-12 06:32:08,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 06:32:08,796 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-12 06:32:08,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 31 [2022-07-12 06:32:08,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 06:32:08,815 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-12 06:32:08,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 31 [2022-07-12 06:32:08,833 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 06:32:08,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 06:32:08,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-12 06:32:08,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-12 06:32:08,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-12 06:32:08,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-12 06:32:09,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:32:09,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2022-07-12 06:32:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 180 trivial. 12 not checked. [2022-07-12 06:32:09,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:32:09,815 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 06:32:09,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2022-07-12 06:32:09,820 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 06:32:09,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2022-07-12 06:32:10,105 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:32:10,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2022-07-12 06:32:10,129 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:32:10,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2022-07-12 06:32:12,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75224553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:12,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:32:12,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 34 [2022-07-12 06:32:12,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185810605] [2022-07-12 06:32:12,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:32:12,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 06:32:12,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:12,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 06:32:12,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1408, Unknown=20, NotChecked=76, Total=1640 [2022-07-12 06:32:12,312 INFO L87 Difference]: Start difference. First operand 782 states and 1455 transitions. Second operand has 34 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 23 states have internal predecessors, (63), 10 states have call successors, (22), 8 states have call predecessors, (22), 12 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-12 06:32:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:17,668 INFO L93 Difference]: Finished difference Result 1316 states and 2476 transitions. [2022-07-12 06:32:17,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 06:32:17,669 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 23 states have internal predecessors, (63), 10 states have call successors, (22), 8 states have call predecessors, (22), 12 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) Word has length 107 [2022-07-12 06:32:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:17,675 INFO L225 Difference]: With dead ends: 1316 [2022-07-12 06:32:17,675 INFO L226 Difference]: Without dead ends: 1300 [2022-07-12 06:32:17,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 193 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=298, Invalid=2643, Unknown=33, NotChecked=106, Total=3080 [2022-07-12 06:32:17,676 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 42 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:17,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 357 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 496 Invalid, 0 Unknown, 483 Unchecked, 0.3s Time] [2022-07-12 06:32:17,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-07-12 06:32:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1040. [2022-07-12 06:32:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 778 states have (on average 1.2352185089974292) internal successors, (961), 797 states have internal predecessors, (961), 69 states have call successors, (69), 41 states have call predecessors, (69), 192 states have return successors, (868), 201 states have call predecessors, (868), 37 states have call successors, (868) [2022-07-12 06:32:17,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1898 transitions. [2022-07-12 06:32:17,750 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1898 transitions. Word has length 107 [2022-07-12 06:32:17,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:17,751 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 1898 transitions. [2022-07-12 06:32:17,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 23 states have internal predecessors, (63), 10 states have call successors, (22), 8 states have call predecessors, (22), 12 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-12 06:32:17,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1898 transitions. [2022-07-12 06:32:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-12 06:32:17,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:17,756 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:17,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:17,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:17,991 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash -285986040, now seen corresponding path program 3 times [2022-07-12 06:32:17,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:17,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27305315] [2022-07-12 06:32:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:17,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:18,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:18,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:18,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:32:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:18,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:18,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:32:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:18,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:18,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:32:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:18,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:32:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:18,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:18,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:32:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:18,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:18,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:32:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:19,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:19,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:32:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 46 proven. 82 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-12 06:32:19,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:19,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27305315] [2022-07-12 06:32:19,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27305315] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:19,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581988353] [2022-07-12 06:32:19,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:32:19,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:19,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:19,144 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:32:19,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 06:32:20,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-12 06:32:20,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:32:20,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 151 conjunts are in the unsatisfiable core [2022-07-12 06:32:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:20,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 06:32:20,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-07-12 06:32:20,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-07-12 06:32:20,196 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 06:32:20,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 06:32:20,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:32:20,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 06:32:20,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 06:32:22,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 06:32:22,896 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 06:32:22,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 50 [2022-07-12 06:32:22,902 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 06:32:22,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2022-07-12 06:32:23,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 9 [2022-07-12 06:32:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 47 proven. 87 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-12 06:32:23,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:32:24,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581988353] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:24,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:32:24,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36] total 68 [2022-07-12 06:32:24,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617153864] [2022-07-12 06:32:24,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:32:24,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-12 06:32:24,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:24,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-12 06:32:24,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6395, Unknown=2, NotChecked=0, Total=6642 [2022-07-12 06:32:24,260 INFO L87 Difference]: Start difference. First operand 1040 states and 1898 transitions. Second operand has 68 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 50 states have internal predecessors, (104), 23 states have call successors, (32), 10 states have call predecessors, (32), 16 states have return successors, (24), 22 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-12 06:32:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:34,599 INFO L93 Difference]: Finished difference Result 3098 states and 7729 transitions. [2022-07-12 06:32:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-07-12 06:32:34,599 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 50 states have internal predecessors, (104), 23 states have call successors, (32), 10 states have call predecessors, (32), 16 states have return successors, (24), 22 states have call predecessors, (24), 17 states have call successors, (24) Word has length 100 [2022-07-12 06:32:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:34,627 INFO L225 Difference]: With dead ends: 3098 [2022-07-12 06:32:34,627 INFO L226 Difference]: Without dead ends: 3096 [2022-07-12 06:32:34,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9265 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1541, Invalid=34744, Unknown=5, NotChecked=0, Total=36290 [2022-07-12 06:32:34,632 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 167 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 4342 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 6385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1974 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:34,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 929 Invalid, 6385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 4342 Invalid, 0 Unknown, 1974 Unchecked, 1.9s Time] [2022-07-12 06:32:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2022-07-12 06:32:34,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2000. [2022-07-12 06:32:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1527 states have (on average 1.2822527832351016) internal successors, (1958), 1495 states have internal predecessors, (1958), 103 states have call successors, (103), 54 states have call predecessors, (103), 369 states have return successors, (2675), 450 states have call predecessors, (2675), 66 states have call successors, (2675) [2022-07-12 06:32:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 4736 transitions. [2022-07-12 06:32:34,889 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 4736 transitions. Word has length 100 [2022-07-12 06:32:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:34,889 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 4736 transitions. [2022-07-12 06:32:34,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 50 states have internal predecessors, (104), 23 states have call successors, (32), 10 states have call predecessors, (32), 16 states have return successors, (24), 22 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-12 06:32:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 4736 transitions. [2022-07-12 06:32:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 06:32:34,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:34,899 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:34,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:35,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-12 06:32:35,124 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:35,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:35,124 INFO L85 PathProgramCache]: Analyzing trace with hash 181678716, now seen corresponding path program 4 times [2022-07-12 06:32:35,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:35,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412037176] [2022-07-12 06:32:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:35,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:35,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:35,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:35,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:35,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:32:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:35,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-12 06:32:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:35,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:32:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:35,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:35,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:35,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:32:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:35,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-12 06:32:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 06:32:35,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:35,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412037176] [2022-07-12 06:32:35,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412037176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633710132] [2022-07-12 06:32:35,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:32:35,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:35,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:35,980 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:32:35,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 06:32:36,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:32:36,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:32:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-12 06:32:36,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:36,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:32:36,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:32:36,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 06:32:36,965 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:32:36,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 62 [2022-07-12 06:32:36,971 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:32:36,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2022-07-12 06:32:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-12 06:32:36,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:32:37,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633710132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:37,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:32:37,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 19] total 49 [2022-07-12 06:32:37,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456141250] [2022-07-12 06:32:37,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:32:37,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 06:32:37,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:37,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 06:32:37,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2695, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 06:32:37,629 INFO L87 Difference]: Start difference. First operand 2000 states and 4736 transitions. Second operand has 49 states, 40 states have (on average 2.15) internal successors, (86), 38 states have internal predecessors, (86), 18 states have call successors, (23), 10 states have call predecessors, (23), 15 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2022-07-12 06:32:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:42,054 INFO L93 Difference]: Finished difference Result 9864 states and 36483 transitions. [2022-07-12 06:32:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-12 06:32:42,055 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 40 states have (on average 2.15) internal successors, (86), 38 states have internal predecessors, (86), 18 states have call successors, (23), 10 states have call predecessors, (23), 15 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) Word has length 76 [2022-07-12 06:32:42,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:42,173 INFO L225 Difference]: With dead ends: 9864 [2022-07-12 06:32:42,174 INFO L226 Difference]: Without dead ends: 9851 [2022-07-12 06:32:42,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3678 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1262, Invalid=13500, Unknown=0, NotChecked=0, Total=14762 [2022-07-12 06:32:42,182 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 379 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 3753 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 5331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 3753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1074 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:42,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 597 Invalid, 5331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 3753 Invalid, 0 Unknown, 1074 Unchecked, 1.6s Time] [2022-07-12 06:32:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9851 states. [2022-07-12 06:32:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9851 to 4466. [2022-07-12 06:32:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4466 states, 3446 states have (on average 1.2962855484619848) internal successors, (4467), 3274 states have internal predecessors, (4467), 242 states have call successors, (242), 81 states have call predecessors, (242), 777 states have return successors, (10402), 1110 states have call predecessors, (10402), 186 states have call successors, (10402) [2022-07-12 06:32:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4466 states to 4466 states and 15111 transitions. [2022-07-12 06:32:43,051 INFO L78 Accepts]: Start accepts. Automaton has 4466 states and 15111 transitions. Word has length 76 [2022-07-12 06:32:43,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:43,052 INFO L495 AbstractCegarLoop]: Abstraction has 4466 states and 15111 transitions. [2022-07-12 06:32:43,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 40 states have (on average 2.15) internal successors, (86), 38 states have internal predecessors, (86), 18 states have call successors, (23), 10 states have call predecessors, (23), 15 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2022-07-12 06:32:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4466 states and 15111 transitions. [2022-07-12 06:32:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 06:32:43,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:43,070 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:43,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-12 06:32:43,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-12 06:32:43,283 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:43,283 INFO L85 PathProgramCache]: Analyzing trace with hash 298042362, now seen corresponding path program 2 times [2022-07-12 06:32:43,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:43,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836520362] [2022-07-12 06:32:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:43,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:43,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:43,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:43,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:43,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:32:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:43,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-12 06:32:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:43,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-12 06:32:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:43,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:43,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:43,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:32:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:43,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-12 06:32:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-12 06:32:43,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:43,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836520362] [2022-07-12 06:32:43,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836520362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:43,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953662721] [2022-07-12 06:32:43,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:32:43,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:43,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:43,808 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:32:43,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 06:32:44,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:32:44,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:32:44,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-12 06:32:44,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:44,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 06:32:44,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-07-12 06:32:44,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-07-12 06:32:44,155 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 06:32:44,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 06:32:44,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 06:32:44,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-12 06:32:44,199 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-12 06:32:44,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2022-07-12 06:32:44,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-12 06:32:44,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 06:32:44,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 06:32:44,849 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 06:32:44,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2022-07-12 06:32:44,855 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 06:32:44,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-12 06:32:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 06:32:44,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:32:45,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 06:32:45,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 06:32:46,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953662721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:46,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:32:46,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 33 [2022-07-12 06:32:46,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045256950] [2022-07-12 06:32:46,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:32:46,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 06:32:46,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:32:46,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 06:32:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1602, Unknown=1, NotChecked=0, Total=1722 [2022-07-12 06:32:46,654 INFO L87 Difference]: Start difference. First operand 4466 states and 15111 transitions. Second operand has 33 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 22 states have internal predecessors, (65), 11 states have call successors, (21), 10 states have call predecessors, (21), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-12 06:32:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:32:47,766 INFO L93 Difference]: Finished difference Result 4661 states and 15508 transitions. [2022-07-12 06:32:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 06:32:47,767 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 22 states have internal predecessors, (65), 11 states have call successors, (21), 10 states have call predecessors, (21), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) Word has length 76 [2022-07-12 06:32:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:32:47,872 INFO L225 Difference]: With dead ends: 4661 [2022-07-12 06:32:47,872 INFO L226 Difference]: Without dead ends: 4599 [2022-07-12 06:32:47,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=247, Invalid=3058, Unknown=1, NotChecked=0, Total=3306 [2022-07-12 06:32:47,879 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 99 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 06:32:47,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 580 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1035 Invalid, 0 Unknown, 306 Unchecked, 0.5s Time] [2022-07-12 06:32:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2022-07-12 06:32:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4593. [2022-07-12 06:32:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4593 states, 3537 states have (on average 1.2945999434549054) internal successors, (4579), 3364 states have internal predecessors, (4579), 258 states have call successors, (258), 87 states have call predecessors, (258), 797 states have return successors, (10568), 1141 states have call predecessors, (10568), 200 states have call successors, (10568) [2022-07-12 06:32:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4593 states to 4593 states and 15405 transitions. [2022-07-12 06:32:48,464 INFO L78 Accepts]: Start accepts. Automaton has 4593 states and 15405 transitions. Word has length 76 [2022-07-12 06:32:48,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:32:48,465 INFO L495 AbstractCegarLoop]: Abstraction has 4593 states and 15405 transitions. [2022-07-12 06:32:48,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 22 states have internal predecessors, (65), 11 states have call successors, (21), 10 states have call predecessors, (21), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-12 06:32:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 4593 states and 15405 transitions. [2022-07-12 06:32:48,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-12 06:32:48,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:32:48,491 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:32:48,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 06:32:48,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:48,708 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:32:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:32:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1500376225, now seen corresponding path program 4 times [2022-07-12 06:32:48,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:32:48,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119672872] [2022-07-12 06:32:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:32:48,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:32:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:48,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:48,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:49,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:32:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:50,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:51,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 06:32:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:51,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 06:32:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:51,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-12 06:32:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:51,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:32:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:51,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:51,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:51,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:32:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:51,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-12 06:32:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:51,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:32:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:51,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 06:32:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:32:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-12 06:32:51,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:32:51,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119672872] [2022-07-12 06:32:51,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119672872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:32:51,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767250625] [2022-07-12 06:32:51,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:32:51,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:32:51,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:32:51,531 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:32:51,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 06:32:51,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:32:51,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:32:51,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-12 06:32:51,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:32:51,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 06:32:52,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 06:32:52,086 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 06:32:52,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 23 [2022-07-12 06:32:52,123 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 06:32:52,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 06:32:52,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 06:32:52,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-12 06:33:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 74 proven. 66 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-12 06:33:18,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:33:26,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767250625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:33:26,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:33:26,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2022-07-12 06:33:26,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736335831] [2022-07-12 06:33:26,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:33:26,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 06:33:26,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:33:26,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 06:33:26,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2106, Unknown=11, NotChecked=0, Total=2256 [2022-07-12 06:33:26,017 INFO L87 Difference]: Start difference. First operand 4593 states and 15405 transitions. Second operand has 44 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 19 states have call successors, (28), 9 states have call predecessors, (28), 16 states have return successors, (24), 18 states have call predecessors, (24), 17 states have call successors, (24)