./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ifeqn4.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 b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:05:23,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:05:23,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:05:23,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:05:23,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:05:23,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:05:23,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:05:23,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:05:23,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:05:23,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:05:23,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:05:23,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:05:23,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:05:23,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:05:23,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:05:23,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:05:23,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:05:23,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:05:23,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:05:23,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:05:23,165 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:05:23,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:05:23,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:05:23,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:05:23,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:05:23,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:05:23,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:05:23,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:05:23,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:05:23,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:05:23,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:05:23,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:05:23,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:05:23,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:05:23,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:05:23,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:05:23,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:05:23,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:05:23,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:05:23,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:05:23,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:05:23,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:05:23,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:05:23,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:05:23,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:05:23,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:05:23,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:05:23,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:05:23,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:05:23,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:05:23,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:05:23,211 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:05:23,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:05:23,212 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:05:23,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:05:23,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:05:23,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:05:23,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:05:23,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:05:23,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:05:23,213 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:05:23,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:05:23,214 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:05:23,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:05:23,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:05:23,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:05:23,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:05:23,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:05:23,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:05:23,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:05:23,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:05:23,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:05:23,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:05:23,216 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:05:23,216 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:05:23,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:05:23,216 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 [2022-07-20 22:05:23,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:05:23,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:05:23,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:05:23,460 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:05:23,460 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:05:23,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn4.c [2022-07-20 22:05:23,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94f02aa13/c20dfb7225f64ea4ac3a295e81ff3b75/FLAG46fb06093 [2022-07-20 22:05:23,930 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:05:23,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn4.c [2022-07-20 22:05:23,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94f02aa13/c20dfb7225f64ea4ac3a295e81ff3b75/FLAG46fb06093 [2022-07-20 22:05:23,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94f02aa13/c20dfb7225f64ea4ac3a295e81ff3b75 [2022-07-20 22:05:23,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:05:23,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:05:23,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:05:23,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:05:23,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:05:23,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:05:23" (1/1) ... [2022-07-20 22:05:23,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@482e66d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:23, skipping insertion in model container [2022-07-20 22:05:23,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:05:23" (1/1) ... [2022-07-20 22:05:23,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:05:23,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:05:24,114 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/array-fpi/ifeqn4.c[589,602] [2022-07-20 22:05:24,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:05:24,138 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:05:24,147 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/array-fpi/ifeqn4.c[589,602] [2022-07-20 22:05:24,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:05:24,166 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:05:24,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:24 WrapperNode [2022-07-20 22:05:24,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:05:24,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:05:24,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:05:24,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:05:24,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:24" (1/1) ... [2022-07-20 22:05:24,182 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:24" (1/1) ... [2022-07-20 22:05:24,197 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-07-20 22:05:24,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:05:24,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:05:24,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:05:24,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:05:24,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:24" (1/1) ... [2022-07-20 22:05:24,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:24" (1/1) ... [2022-07-20 22:05:24,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:24" (1/1) ... [2022-07-20 22:05:24,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:24" (1/1) ... [2022-07-20 22:05:24,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:24" (1/1) ... [2022-07-20 22:05:24,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:24" (1/1) ... [2022-07-20 22:05:24,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:24" (1/1) ... [2022-07-20 22:05:24,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:05:24,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:05:24,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:05:24,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:05:24,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:24" (1/1) ... [2022-07-20 22:05:24,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:05:24,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:05:24,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 22:05:24,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 22:05:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:05:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:05:24,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 22:05:24,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 22:05:24,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:05:24,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:05:24,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 22:05:24,324 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:05:24,325 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:05:24,477 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:05:24,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:05:24,498 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 22:05:24,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:05:24 BoogieIcfgContainer [2022-07-20 22:05:24,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:05:24,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:05:24,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:05:24,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:05:24,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:05:23" (1/3) ... [2022-07-20 22:05:24,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff3c627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:05:24, skipping insertion in model container [2022-07-20 22:05:24,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:05:24" (2/3) ... [2022-07-20 22:05:24,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff3c627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:05:24, skipping insertion in model container [2022-07-20 22:05:24,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:05:24" (3/3) ... [2022-07-20 22:05:24,507 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2022-07-20 22:05:24,518 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:05:24,519 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:05:24,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:05:24,567 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@63d6d14d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f83360 [2022-07-20 22:05:24,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:05:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 22:05:24,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:24,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:24,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:24,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2022-07-20 22:05:24,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:24,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817684488] [2022-07-20 22:05:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:24,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:05:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:05:24,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:05:24,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817684488] [2022-07-20 22:05:24,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817684488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:05:24,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:05:24,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:05:24,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174561804] [2022-07-20 22:05:24,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:05:24,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 22:05:24,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:05:24,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 22:05:24,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 22:05:24,732 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:05:24,747 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-07-20 22:05:24,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 22:05:24,749 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 22:05:24,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:05:24,757 INFO L225 Difference]: With dead ends: 42 [2022-07-20 22:05:24,757 INFO L226 Difference]: Without dead ends: 19 [2022-07-20 22:05:24,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 22:05:24,763 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:05:24,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:05:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-20 22:05:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-20 22:05:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-20 22:05:24,792 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-07-20 22:05:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:05:24,792 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-20 22:05:24,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-20 22:05:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 22:05:24,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:24,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:24,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:05:24,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2022-07-20 22:05:24,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:24,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130061220] [2022-07-20 22:05:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:24,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:05:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:05:24,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:05:24,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130061220] [2022-07-20 22:05:24,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130061220] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:05:24,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:05:24,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:05:24,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46596296] [2022-07-20 22:05:24,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:05:24,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:05:24,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:05:24,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:05:24,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:05:24,901 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:05:24,987 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-07-20 22:05:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:05:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 22:05:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:05:24,989 INFO L225 Difference]: With dead ends: 45 [2022-07-20 22:05:24,990 INFO L226 Difference]: Without dead ends: 31 [2022-07-20 22:05:24,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:05:24,993 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:05:24,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:05:24,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-20 22:05:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-07-20 22:05:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-20 22:05:25,003 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-07-20 22:05:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:05:25,003 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-20 22:05:25,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-20 22:05:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 22:05:25,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:25,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:25,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:05:25,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:25,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:25,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2022-07-20 22:05:25,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:25,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135369645] [2022-07-20 22:05:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:25,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:25,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:05:25,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536493550] [2022-07-20 22:05:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:25,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:05:25,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:05:25,054 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:05:25,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:05:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:05:25,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 22:05:25,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:05:25,160 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 [2022-07-20 22:05:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:05:25,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:05:25,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:05:25,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135369645] [2022-07-20 22:05:25,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:05:25,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536493550] [2022-07-20 22:05:25,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536493550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:05:25,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:05:25,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:05:25,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531029074] [2022-07-20 22:05:25,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:05:25,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:05:25,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:05:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:05:25,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:05:25,284 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:25,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:05:25,357 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-07-20 22:05:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:05:25,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-20 22:05:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:05:25,361 INFO L225 Difference]: With dead ends: 40 [2022-07-20 22:05:25,362 INFO L226 Difference]: Without dead ends: 38 [2022-07-20 22:05:25,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:05:25,364 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:05:25,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:05:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-20 22:05:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-07-20 22:05:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-07-20 22:05:25,376 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2022-07-20 22:05:25,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:05:25,377 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-07-20 22:05:25,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:25,377 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-07-20 22:05:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 22:05:25,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:25,379 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:25,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 22:05:25,595 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 [2022-07-20 22:05:25,595 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:25,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:25,596 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2022-07-20 22:05:25,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:25,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371682418] [2022-07-20 22:05:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:25,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:25,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:05:25,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081474171] [2022-07-20 22:05:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:25,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:05:25,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:05:25,642 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:05:25,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:05:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:05:25,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 22:05:25,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:05:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:05:25,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:05:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:05:25,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:05:25,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371682418] [2022-07-20 22:05:25,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:05:25,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081474171] [2022-07-20 22:05:25,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081474171] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:05:25,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:05:25,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-20 22:05:25,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811319350] [2022-07-20 22:05:25,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:05:25,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:05:25,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:05:25,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:05:25,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:05:25,830 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:26,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:05:26,003 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-07-20 22:05:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 22:05:26,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-20 22:05:26,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:05:26,004 INFO L225 Difference]: With dead ends: 70 [2022-07-20 22:05:26,004 INFO L226 Difference]: Without dead ends: 43 [2022-07-20 22:05:26,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:05:26,006 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:05:26,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:05:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-20 22:05:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-07-20 22:05:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-20 22:05:26,011 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-07-20 22:05:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:05:26,011 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-20 22:05:26,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-20 22:05:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 22:05:26,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:26,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:26,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:05:26,223 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 [2022-07-20 22:05:26,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:26,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:26,224 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2022-07-20 22:05:26,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:26,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004211498] [2022-07-20 22:05:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:26,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:26,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:05:26,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294482257] [2022-07-20 22:05:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:26,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:05:26,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:05:26,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:05:26,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:05:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:05:26,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 22:05:26,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:05:26,372 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 [2022-07-20 22:05:26,429 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-20 22:05:26,430 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 21 treesize of output 20 [2022-07-20 22:05:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:05:26,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:05:26,689 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 19 [2022-07-20 22:05:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:05:26,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:05:26,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004211498] [2022-07-20 22:05:26,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:05:26,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294482257] [2022-07-20 22:05:26,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294482257] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:05:26,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:05:26,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2022-07-20 22:05:26,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423512124] [2022-07-20 22:05:26,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:05:26,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 22:05:26,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:05:26,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 22:05:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:05:26,727 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:05:26,885 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-07-20 22:05:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 22:05:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-20 22:05:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:05:26,887 INFO L225 Difference]: With dead ends: 73 [2022-07-20 22:05:26,887 INFO L226 Difference]: Without dead ends: 61 [2022-07-20 22:05:26,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:05:26,888 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:05:26,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 71 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-07-20 22:05:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-20 22:05:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2022-07-20 22:05:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:26,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-07-20 22:05:26,894 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2022-07-20 22:05:26,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:05:26,895 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-07-20 22:05:26,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:26,895 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-07-20 22:05:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 22:05:26,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:26,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:26,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:05:27,111 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 [2022-07-20 22:05:27,112 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2022-07-20 22:05:27,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:27,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127085585] [2022-07-20 22:05:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:27,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:27,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:05:27,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498376287] [2022-07-20 22:05:27,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:27,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:05:27,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:05:27,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:05:27,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:05:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:05:27,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 22:05:27,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:05:27,259 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 10 treesize of output 8 [2022-07-20 22:05:27,282 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 [2022-07-20 22:05:27,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:27,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-07-20 22:05:27,394 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 [2022-07-20 22:05:27,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:27,459 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:05:27,459 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-07-20 22:05:27,622 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 22:05:27,622 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 38 [2022-07-20 22:05:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:05:27,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:05:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:05:28,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:05:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127085585] [2022-07-20 22:05:28,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:05:28,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498376287] [2022-07-20 22:05:28,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498376287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:05:28,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:05:28,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-07-20 22:05:28,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632032013] [2022-07-20 22:05:28,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:05:28,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 22:05:28,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:05:28,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 22:05:28,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-07-20 22:05:28,377 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:05:29,144 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2022-07-20 22:05:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 22:05:29,145 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-20 22:05:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:05:29,146 INFO L225 Difference]: With dead ends: 112 [2022-07-20 22:05:29,147 INFO L226 Difference]: Without dead ends: 81 [2022-07-20 22:05:29,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-07-20 22:05:29,148 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:05:29,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 75 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 174 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-07-20 22:05:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-20 22:05:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2022-07-20 22:05:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:29,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-07-20 22:05:29,167 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 28 [2022-07-20 22:05:29,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:05:29,168 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-07-20 22:05:29,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:29,170 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-07-20 22:05:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 22:05:29,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:29,171 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:29,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:05:29,387 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 [2022-07-20 22:05:29,387 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:29,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:29,388 INFO L85 PathProgramCache]: Analyzing trace with hash -849177916, now seen corresponding path program 2 times [2022-07-20 22:05:29,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:29,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934418134] [2022-07-20 22:05:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:29,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:29,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:05:29,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450742524] [2022-07-20 22:05:29,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:05:29,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:05:29,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:05:29,414 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:05:29,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:05:29,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 22:05:29,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:05:29,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 22:05:29,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:05:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:05:29,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:05:29,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:05:29,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934418134] [2022-07-20 22:05:29,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:05:29,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450742524] [2022-07-20 22:05:29,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450742524] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:05:29,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:05:29,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:05:29,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852323612] [2022-07-20 22:05:29,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:05:29,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:05:29,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:05:29,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:05:29,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:05:29,512 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:05:29,565 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2022-07-20 22:05:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:05:29,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-20 22:05:29,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:05:29,567 INFO L225 Difference]: With dead ends: 111 [2022-07-20 22:05:29,567 INFO L226 Difference]: Without dead ends: 80 [2022-07-20 22:05:29,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:05:29,568 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:05:29,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:05:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-20 22:05:29,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2022-07-20 22:05:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-07-20 22:05:29,577 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 30 [2022-07-20 22:05:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:05:29,578 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-07-20 22:05:29,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-07-20 22:05:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 22:05:29,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:29,579 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:29,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 22:05:29,799 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 [2022-07-20 22:05:29,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:29,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1242204926, now seen corresponding path program 3 times [2022-07-20 22:05:29,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:29,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301571202] [2022-07-20 22:05:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:29,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:29,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:05:29,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244316764] [2022-07-20 22:05:29,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 22:05:29,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:05:29,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:05:29,847 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:05:29,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 22:05:30,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 22:05:30,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:05:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 22:05:30,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:05:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:05:30,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:05:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 22:05:30,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:05:30,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301571202] [2022-07-20 22:05:30,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:05:30,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244316764] [2022-07-20 22:05:30,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244316764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:05:30,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:05:30,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2022-07-20 22:05:30,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231527718] [2022-07-20 22:05:30,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:05:30,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 22:05:30,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:05:30,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 22:05:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:05:30,304 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:30,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:05:30,641 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2022-07-20 22:05:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 22:05:30,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-20 22:05:30,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:05:30,642 INFO L225 Difference]: With dead ends: 116 [2022-07-20 22:05:30,642 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 22:05:30,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2022-07-20 22:05:30,643 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 200 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:05:30,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 71 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:05:30,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 22:05:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2022-07-20 22:05:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-07-20 22:05:30,652 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 30 [2022-07-20 22:05:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:05:30,652 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-07-20 22:05:30,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-07-20 22:05:30,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 22:05:30,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:30,653 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:30,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 22:05:30,853 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 [2022-07-20 22:05:30,854 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:30,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:30,854 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2022-07-20 22:05:30,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:30,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154078890] [2022-07-20 22:05:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:30,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:30,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:05:30,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81224491] [2022-07-20 22:05:30,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:05:30,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:05:30,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:05:30,882 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:05:30,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 22:05:30,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 22:05:30,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:05:30,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 22:05:30,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:05:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:05:31,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:05:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:05:31,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:05:31,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154078890] [2022-07-20 22:05:31,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:05:31,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81224491] [2022-07-20 22:05:31,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81224491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:05:31,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:05:31,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-20 22:05:31,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495858240] [2022-07-20 22:05:31,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:05:31,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 22:05:31,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:05:31,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 22:05:31,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-20 22:05:31,061 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:31,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:05:31,199 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-07-20 22:05:31,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 22:05:31,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-20 22:05:31,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:05:31,200 INFO L225 Difference]: With dead ends: 102 [2022-07-20 22:05:31,200 INFO L226 Difference]: Without dead ends: 77 [2022-07-20 22:05:31,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-20 22:05:31,201 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 76 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:05:31,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 60 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:05:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-20 22:05:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2022-07-20 22:05:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:31,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-07-20 22:05:31,208 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 32 [2022-07-20 22:05:31,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:05:31,208 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-07-20 22:05:31,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:31,208 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-07-20 22:05:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 22:05:31,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:31,209 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:31,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 22:05:31,411 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 [2022-07-20 22:05:31,412 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1847758638, now seen corresponding path program 4 times [2022-07-20 22:05:31,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:31,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480380896] [2022-07-20 22:05:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:31,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:31,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:05:31,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967678917] [2022-07-20 22:05:31,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 22:05:31,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:05:31,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:05:31,452 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:05:31,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 22:05:31,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 22:05:31,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:05:31,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 22:05:31,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:05:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:05:31,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:05:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:05:31,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:05:31,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480380896] [2022-07-20 22:05:31,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:05:31,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967678917] [2022-07-20 22:05:31,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967678917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:05:31,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:05:31,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-20 22:05:31,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005618412] [2022-07-20 22:05:31,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:05:31,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 22:05:31,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:05:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 22:05:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:05:31,692 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:05:31,924 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-07-20 22:05:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 22:05:31,925 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-20 22:05:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:05:31,926 INFO L225 Difference]: With dead ends: 116 [2022-07-20 22:05:31,926 INFO L226 Difference]: Without dead ends: 103 [2022-07-20 22:05:31,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-20 22:05:31,927 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 115 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:05:31,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 107 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:05:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-20 22:05:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 64. [2022-07-20 22:05:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-07-20 22:05:31,936 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 33 [2022-07-20 22:05:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:05:31,936 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-07-20 22:05:31,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-07-20 22:05:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 22:05:31,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:31,937 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:31,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 22:05:32,159 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 [2022-07-20 22:05:32,160 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1646708229, now seen corresponding path program 3 times [2022-07-20 22:05:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:32,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788589106] [2022-07-20 22:05:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:32,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:32,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:05:32,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049853184] [2022-07-20 22:05:32,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 22:05:32,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:05:32,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:05:32,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:05:32,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 22:05:32,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 22:05:32,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:05:32,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 22:05:32,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:05:32,468 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 10 treesize of output 8 [2022-07-20 22:05:32,498 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 [2022-07-20 22:05:32,562 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 57 treesize of output 50 [2022-07-20 22:05:32,585 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-07-20 22:05:32,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 95 [2022-07-20 22:05:32,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:32,600 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-07-20 22:05:32,802 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 80 treesize of output 73 [2022-07-20 22:05:32,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:32,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:32,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:32,829 INFO L356 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2022-07-20 22:05:32,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 124 [2022-07-20 22:05:32,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:32,856 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-07-20 22:05:45,250 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 52 [2022-07-20 22:05:45,254 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 8 treesize of output 7 [2022-07-20 22:05:49,502 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 157 [2022-07-20 22:05:49,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:05:49,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:49,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:49,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:49,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:49,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:49,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:49,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 194 [2022-07-20 22:05:49,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:49,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:49,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:49,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 57 [2022-07-20 22:05:50,160 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 81 [2022-07-20 22:05:50,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:50,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:50,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 62 [2022-07-20 22:05:50,624 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 22:05:50,625 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 72 treesize of output 64 [2022-07-20 22:05:50,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:50,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:50,633 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 15 treesize of output 11 [2022-07-20 22:05:50,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-07-20 22:05:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:05:50,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:05:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:05:52,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:05:52,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788589106] [2022-07-20 22:05:52,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:05:52,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049853184] [2022-07-20 22:05:52,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049853184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:05:52,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:05:52,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2022-07-20 22:05:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283481730] [2022-07-20 22:05:52,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:05:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 22:05:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:05:52,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 22:05:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1339, Unknown=5, NotChecked=0, Total=1640 [2022-07-20 22:05:52,454 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 41 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:05:57,377 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-07-20 22:05:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 22:05:57,377 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 41 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-20 22:05:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:05:57,378 INFO L225 Difference]: With dead ends: 76 [2022-07-20 22:05:57,378 INFO L226 Difference]: Without dead ends: 74 [2022-07-20 22:05:57,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=386, Invalid=1679, Unknown=5, NotChecked=0, Total=2070 [2022-07-20 22:05:57,380 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:05:57,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 92 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 100 Unchecked, 0.0s Time] [2022-07-20 22:05:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-20 22:05:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2022-07-20 22:05:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2022-07-20 22:05:57,388 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 34 [2022-07-20 22:05:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:05:57,389 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2022-07-20 22:05:57,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 41 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2022-07-20 22:05:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 22:05:57,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:57,390 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:57,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 22:05:57,611 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 [2022-07-20 22:05:57,611 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash -653025448, now seen corresponding path program 4 times [2022-07-20 22:05:57,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:57,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113533370] [2022-07-20 22:05:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:57,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:57,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:05:57,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398371580] [2022-07-20 22:05:57,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 22:05:57,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:05:57,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:05:57,640 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) [2022-07-20 22:05:57,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 22:05:57,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 22:05:57,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:05:57,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 22:05:57,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:05:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:05:57,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:05:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:05:58,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:05:58,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113533370] [2022-07-20 22:05:58,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:05:58,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398371580] [2022-07-20 22:05:58,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398371580] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:05:58,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:05:58,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-20 22:05:58,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098352156] [2022-07-20 22:05:58,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:05:58,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 22:05:58,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:05:58,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 22:05:58,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:05:58,007 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:05:58,779 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-07-20 22:05:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 22:05:58,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-20 22:05:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:05:58,780 INFO L225 Difference]: With dead ends: 98 [2022-07-20 22:05:58,780 INFO L226 Difference]: Without dead ends: 82 [2022-07-20 22:05:58,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-07-20 22:05:58,781 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 133 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:05:58,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 116 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:05:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-20 22:05:58,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2022-07-20 22:05:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-07-20 22:05:58,789 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 34 [2022-07-20 22:05:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:05:58,789 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-07-20 22:05:58,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:05:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-07-20 22:05:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 22:05:58,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:05:58,790 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:05:58,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 22:05:59,007 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 [2022-07-20 22:05:59,007 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:05:59,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:05:59,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1259217666, now seen corresponding path program 5 times [2022-07-20 22:05:59,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:05:59,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695980284] [2022-07-20 22:05:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:05:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:05:59,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:05:59,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717522940] [2022-07-20 22:05:59,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 22:05:59,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:05:59,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:05:59,036 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:05:59,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 22:05:59,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-20 22:05:59,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:05:59,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 22:05:59,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:05:59,880 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 [2022-07-20 22:05:59,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:05:59,976 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 25 treesize of output 24 [2022-07-20 22:06:00,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:00,052 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 25 treesize of output 24 [2022-07-20 22:06:00,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:00,091 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 [2022-07-20 22:06:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:06:00,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:06:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 22:06:00,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:06:00,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695980284] [2022-07-20 22:06:00,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:06:00,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717522940] [2022-07-20 22:06:00,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717522940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:06:00,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:06:00,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-07-20 22:06:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017646776] [2022-07-20 22:06:00,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:06:00,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 22:06:00,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:06:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 22:06:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-07-20 22:06:00,866 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:01,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:06:01,431 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2022-07-20 22:06:01,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 22:06:01,431 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 22:06:01,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:06:01,432 INFO L225 Difference]: With dead ends: 115 [2022-07-20 22:06:01,432 INFO L226 Difference]: Without dead ends: 113 [2022-07-20 22:06:01,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2022-07-20 22:06:01,433 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:06:01,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 164 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 222 Invalid, 0 Unknown, 236 Unchecked, 0.3s Time] [2022-07-20 22:06:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-20 22:06:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 73. [2022-07-20 22:06:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2022-07-20 22:06:01,441 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 36 [2022-07-20 22:06:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:06:01,442 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2022-07-20 22:06:01,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2022-07-20 22:06:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 22:06:01,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:06:01,443 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:06:01,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 22:06:01,649 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 [2022-07-20 22:06:01,649 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:06:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:06:01,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 5 times [2022-07-20 22:06:01,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:06:01,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416382995] [2022-07-20 22:06:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:06:01,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:06:01,668 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:06:01,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906782199] [2022-07-20 22:06:01,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 22:06:01,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:06:01,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:06:01,670 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:06:01,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 22:06:01,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 22:06:01,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:06:01,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-20 22:06:01,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:06:01,893 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 10 treesize of output 8 [2022-07-20 22:06:01,926 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 [2022-07-20 22:06:01,998 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 110 treesize of output 99 [2022-07-20 22:06:02,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:02,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-20 22:06:02,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 54 [2022-07-20 22:06:02,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-07-20 22:06:02,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,305 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 34 treesize of output 32 [2022-07-20 22:06:02,486 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 22:06:02,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 141 [2022-07-20 22:06:02,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:02,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2022-07-20 22:06:02,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-20 22:06:02,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:02,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:02,745 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-20 22:06:02,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 58 [2022-07-20 22:06:03,152 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-20 22:06:03,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 43 [2022-07-20 22:06:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:06:03,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:06:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:06:11,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:06:11,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416382995] [2022-07-20 22:06:11,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:06:11,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906782199] [2022-07-20 22:06:11,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906782199] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:06:11,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:06:11,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2022-07-20 22:06:11,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880775957] [2022-07-20 22:06:11,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:06:11,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 22:06:11,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:06:11,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 22:06:11,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-07-20 22:06:11,812 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:06:16,436 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2022-07-20 22:06:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 22:06:16,436 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-20 22:06:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:06:16,437 INFO L225 Difference]: With dead ends: 91 [2022-07-20 22:06:16,437 INFO L226 Difference]: Without dead ends: 67 [2022-07-20 22:06:16,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 22:06:16,438 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:06:16,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 145 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 268 Invalid, 0 Unknown, 168 Unchecked, 1.2s Time] [2022-07-20 22:06:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-20 22:06:16,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2022-07-20 22:06:16,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:16,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-07-20 22:06:16,443 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 38 [2022-07-20 22:06:16,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:06:16,443 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-07-20 22:06:16,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:16,443 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-07-20 22:06:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 22:06:16,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:06:16,443 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:06:16,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 22:06:16,647 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 [2022-07-20 22:06:16,647 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:06:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:06:16,648 INFO L85 PathProgramCache]: Analyzing trace with hash 173090424, now seen corresponding path program 6 times [2022-07-20 22:06:16,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:06:16,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943253878] [2022-07-20 22:06:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:06:16,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:06:16,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:06:16,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631740173] [2022-07-20 22:06:16,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 22:06:16,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:06:16,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:06:16,663 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:06:16,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 22:06:17,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 22:06:17,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:06:17,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-20 22:06:17,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:06:17,114 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 10 treesize of output 8 [2022-07-20 22:06:17,163 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 [2022-07-20 22:06:17,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:17,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 22:06:17,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:17,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 22:06:17,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:17,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 22:06:17,589 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 [2022-07-20 22:06:17,717 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 22:06:17,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 127 [2022-07-20 22:06:17,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:17,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:17,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:17,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:17,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:17,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:17,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 194 [2022-07-20 22:06:17,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:18,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:18,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:18,004 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:06:18,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2022-07-20 22:06:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:18,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:18,116 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:06:18,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 44 [2022-07-20 22:06:18,368 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 22:06:18,368 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2022-07-20 22:06:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:06:18,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:06:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:06:30,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:06:30,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943253878] [2022-07-20 22:06:30,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 22:06:30,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631740173] [2022-07-20 22:06:30,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631740173] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:06:30,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:06:30,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 41 [2022-07-20 22:06:30,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90073184] [2022-07-20 22:06:30,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:06:30,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 22:06:30,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:06:30,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 22:06:30,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1365, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 22:06:30,174 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:06:33,269 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2022-07-20 22:06:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-20 22:06:33,270 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-20 22:06:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:06:33,270 INFO L225 Difference]: With dead ends: 118 [2022-07-20 22:06:33,270 INFO L226 Difference]: Without dead ends: 116 [2022-07-20 22:06:33,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=419, Invalid=2131, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 22:06:33,271 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 57 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:06:33,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 97 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 204 Invalid, 0 Unknown, 293 Unchecked, 0.3s Time] [2022-07-20 22:06:33,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-20 22:06:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-07-20 22:06:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 104 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2022-07-20 22:06:33,281 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 40 [2022-07-20 22:06:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:06:33,281 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2022-07-20 22:06:33,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:06:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2022-07-20 22:06:33,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:06:33,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:06:33,282 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:06:33,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 22:06:33,482 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 [2022-07-20 22:06:33,483 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:06:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:06:33,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1596358930, now seen corresponding path program 7 times [2022-07-20 22:06:33,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:06:33,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146900289] [2022-07-20 22:06:33,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:06:33,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:06:33,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 22:06:33,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930190543] [2022-07-20 22:06:33,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 22:06:33,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:06:33,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:06:33,502 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:06:33,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 22:06:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:06:33,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 22:06:33,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:06:33,962 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 10 treesize of output 8 [2022-07-20 22:06:33,989 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 [2022-07-20 22:06:34,058 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 110 treesize of output 99 [2022-07-20 22:06:34,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:34,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-20 22:06:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 76 [2022-07-20 22:06:34,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2022-07-20 22:06:34,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-07-20 22:06:34,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,448 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 34 treesize of output 32 [2022-07-20 22:06:34,563 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 22:06:34,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 151 treesize of output 137 [2022-07-20 22:06:34,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:34,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2022-07-20 22:06:34,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 49 [2022-07-20 22:06:34,793 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 22:06:34,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 177 treesize of output 155 [2022-07-20 22:06:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:34,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 223 [2022-07-20 22:06:34,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:34,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 65 [2022-07-20 22:06:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:35,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:35,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:35,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:35,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:06:35,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:35,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:06:35,050 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-20 22:06:35,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 74 [2022-07-20 22:06:35,440 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-20 22:06:35,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 46 [2022-07-20 22:06:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:06:35,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:07:08,137 WARN L233 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 121 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 22:07:12,947 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 24780614 treesize of output 24394566