./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array4_pattern.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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:46:34,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:46:34,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:46:34,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:46:34,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:46:34,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:46:34,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:46:34,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:46:34,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:46:34,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:46:34,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:46:34,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:46:34,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:46:34,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:46:34,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:46:34,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:46:34,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:46:34,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:46:34,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:46:34,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:46:34,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:46:34,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:46:34,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:46:34,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:46:34,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:46:34,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:46:34,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:46:34,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:46:34,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:46:34,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:46:34,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:46:34,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:46:34,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:46:34,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:46:34,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:46:34,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:46:34,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:46:34,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:46:34,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:46:34,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:46:34,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:46:34,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 18:46:34,190 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:46:34,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:46:34,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:46:34,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:46:34,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:46:34,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:46:34,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:46:34,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:46:34,193 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:46:34,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:46:34,193 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:46:34,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 18:46:34,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:46:34,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:46:34,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:46:34,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:46:34,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:46:34,194 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:46:34,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:46:34,195 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:46:34,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:46:34,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:46:34,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:46:34,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:46:34,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:46:34,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:46:34,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:46:34,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:46:34,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 18:46:34,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 18:46:34,196 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:46:34,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:46:34,197 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:46:34,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:46:34,197 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:46:34,197 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2023-02-15 18:46:34,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:46:34,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:46:34,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:46:34,388 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:46:34,388 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:46:34,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2023-02-15 18:46:35,314 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:46:35,454 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:46:35,455 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2023-02-15 18:46:35,460 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3379efa1/bebebd8a58194f298d4019cebade51ce/FLAGa2faa4bbb [2023-02-15 18:46:35,472 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3379efa1/bebebd8a58194f298d4019cebade51ce [2023-02-15 18:46:35,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:46:35,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:46:35,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:46:35,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:46:35,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:46:35,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49b0877b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35, skipping insertion in model container [2023-02-15 18:46:35,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:46:35,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:46:35,587 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2023-02-15 18:46:35,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:46:35,607 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:46:35,614 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2023-02-15 18:46:35,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:46:35,628 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:46:35,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35 WrapperNode [2023-02-15 18:46:35,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:46:35,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:46:35,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:46:35,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:46:35,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,650 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2023-02-15 18:46:35,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:46:35,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:46:35,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:46:35,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:46:35,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,663 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:46:35,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:46:35,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:46:35,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:46:35,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35" (1/1) ... [2023-02-15 18:46:35,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:46:35,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:46:35,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 18:46:35,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 18:46:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:46:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 18:46:35,720 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 18:46:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 18:46:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 18:46:35,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 18:46:35,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:46:35,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:46:35,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 18:46:35,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 18:46:35,773 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:46:35,774 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:46:35,921 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:46:35,928 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:46:35,928 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 18:46:35,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:46:35 BoogieIcfgContainer [2023-02-15 18:46:35,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:46:35,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:46:35,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:46:35,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:46:35,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:46:35" (1/3) ... [2023-02-15 18:46:35,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aacb4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:46:35, skipping insertion in model container [2023-02-15 18:46:35,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:35" (2/3) ... [2023-02-15 18:46:35,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aacb4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:46:35, skipping insertion in model container [2023-02-15 18:46:35,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:46:35" (3/3) ... [2023-02-15 18:46:35,948 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2023-02-15 18:46:35,959 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:46:35,959 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:46:36,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:46:36,006 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@650e49e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:46:36,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:46:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:46:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 18:46:36,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:46:36,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:46:36,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:46:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:46:36,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2023-02-15 18:46:36,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:46:36,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926601715] [2023-02-15 18:46:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:36,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:46:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:46:36,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 18:46:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:46:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:46:36,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:46:36,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926601715] [2023-02-15 18:46:36,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926601715] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:46:36,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:46:36,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 18:46:36,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647123933] [2023-02-15 18:46:36,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:46:36,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 18:46:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:46:36,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 18:46:36,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:46:36,143 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 18:46:36,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:46:36,158 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2023-02-15 18:46:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 18:46:36,159 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-15 18:46:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:46:36,163 INFO L225 Difference]: With dead ends: 63 [2023-02-15 18:46:36,164 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 18:46:36,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:46:36,168 INFO L413 NwaCegarLoop]: 40 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, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:46:36,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:46:36,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 18:46:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-15 18:46:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:46:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-02-15 18:46:36,194 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2023-02-15 18:46:36,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:46:36,195 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-02-15 18:46:36,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 18:46:36,195 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-02-15 18:46:36,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 18:46:36,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:46:36,198 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:46:36,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 18:46:36,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:46:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:46:36,201 INFO L85 PathProgramCache]: Analyzing trace with hash -852430543, now seen corresponding path program 1 times [2023-02-15 18:46:36,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:46:36,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653722898] [2023-02-15 18:46:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:36,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:46:36,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:46:36,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776460117] [2023-02-15 18:46:36,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:36,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:46:36,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:46:36,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:46:36,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 18:46:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:46:36,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 18:46:36,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:46:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 18:46:36,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:46:36,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:46:36,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653722898] [2023-02-15 18:46:36,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:46:36,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776460117] [2023-02-15 18:46:36,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776460117] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:46:36,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:46:36,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:46:36,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092527001] [2023-02-15 18:46:36,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:46:36,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:46:36,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:46:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:46:36,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:46:36,361 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:46:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:46:36,388 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2023-02-15 18:46:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:46:36,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-02-15 18:46:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:46:36,389 INFO L225 Difference]: With dead ends: 70 [2023-02-15 18:46:36,389 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 18:46:36,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:46:36,390 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:46:36,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:46:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 18:46:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2023-02-15 18:46:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 18:46:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-02-15 18:46:36,396 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2023-02-15 18:46:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:46:36,397 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-02-15 18:46:36,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:46:36,398 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-02-15 18:46:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 18:46:36,398 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:46:36,399 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:46:36,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 18:46:36,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:46:36,604 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:46:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:46:36,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1661777169, now seen corresponding path program 1 times [2023-02-15 18:46:36,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:46:36,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069090965] [2023-02-15 18:46:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:36,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:46:36,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:46:36,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291490300] [2023-02-15 18:46:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:36,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:46:36,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:46:36,633 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:46:36,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 18:46:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:46:36,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:46:36,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:46:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 18:46:36,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:46:36,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:46:36,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069090965] [2023-02-15 18:46:36,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:46:36,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291490300] [2023-02-15 18:46:36,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291490300] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:46:36,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:46:36,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 18:46:36,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313343227] [2023-02-15 18:46:36,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:46:36,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 18:46:36,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:46:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 18:46:36,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 18:46:36,752 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:46:36,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:46:36,774 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2023-02-15 18:46:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 18:46:36,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-02-15 18:46:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:46:36,777 INFO L225 Difference]: With dead ends: 43 [2023-02-15 18:46:36,777 INFO L226 Difference]: Without dead ends: 39 [2023-02-15 18:46:36,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:46:36,780 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:46:36,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:46:36,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-15 18:46:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-15 18:46:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 18:46:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2023-02-15 18:46:36,793 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2023-02-15 18:46:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:46:36,794 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2023-02-15 18:46:36,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:46:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2023-02-15 18:46:36,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 18:46:36,796 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:46:36,796 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:46:36,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 18:46:37,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 18:46:37,003 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:46:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:46:37,004 INFO L85 PathProgramCache]: Analyzing trace with hash 813208561, now seen corresponding path program 1 times [2023-02-15 18:46:37,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:46:37,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449903424] [2023-02-15 18:46:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:37,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:46:37,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:46:37,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422797407] [2023-02-15 18:46:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:37,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:46:37,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:46:37,034 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:46:37,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 18:46:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:46:37,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:46:37,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:46:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 18:46:37,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:46:37,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:46:37,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449903424] [2023-02-15 18:46:37,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:46:37,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422797407] [2023-02-15 18:46:37,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422797407] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:46:37,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:46:37,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 18:46:37,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261860763] [2023-02-15 18:46:37,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:46:37,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 18:46:37,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:46:37,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 18:46:37,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:46:37,151 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:46:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:46:37,236 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2023-02-15 18:46:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 18:46:37,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2023-02-15 18:46:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:46:37,238 INFO L225 Difference]: With dead ends: 77 [2023-02-15 18:46:37,238 INFO L226 Difference]: Without dead ends: 43 [2023-02-15 18:46:37,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:46:37,241 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:46:37,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 102 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:46:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-15 18:46:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2023-02-15 18:46:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 18:46:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2023-02-15 18:46:37,255 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 44 [2023-02-15 18:46:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:46:37,256 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2023-02-15 18:46:37,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:46:37,257 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2023-02-15 18:46:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 18:46:37,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:46:37,258 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:46:37,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 18:46:37,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:46:37,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:46:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:46:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1843316237, now seen corresponding path program 1 times [2023-02-15 18:46:37,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:46:37,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311600915] [2023-02-15 18:46:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:37,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:46:37,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:46:37,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593698992] [2023-02-15 18:46:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:37,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:46:37,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:46:37,496 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:46:37,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 18:46:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:46:37,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-15 18:46:37,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:46:37,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 18:46:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:46:37,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2023-02-15 18:46:37,642 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-15 18:46:38,146 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:46:38,147 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 28 [2023-02-15 18:46:38,282 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:46:38,286 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-15 18:46:38,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 17 [2023-02-15 18:46:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 18:46:38,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:46:56,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:46:56,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311600915] [2023-02-15 18:46:56,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:46:56,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593698992] [2023-02-15 18:46:56,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593698992] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:46:56,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:46:56,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-15 18:46:56,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449745384] [2023-02-15 18:46:56,512 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 18:46:56,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 18:46:56,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:46:56,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 18:46:56,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=452, Unknown=8, NotChecked=0, Total=552 [2023-02-15 18:46:56,514 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 18:47:01,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 18:47:02,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 18:47:04,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 18:47:06,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 18:47:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:06,843 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2023-02-15 18:47:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 18:47:06,846 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2023-02-15 18:47:06,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:06,847 INFO L225 Difference]: With dead ends: 83 [2023-02-15 18:47:06,847 INFO L226 Difference]: Without dead ends: 79 [2023-02-15 18:47:06,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=237, Invalid=1236, Unknown=9, NotChecked=0, Total=1482 [2023-02-15 18:47:06,848 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 94 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 58 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:06,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 187 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 502 Invalid, 4 Unknown, 0 Unchecked, 8.0s Time] [2023-02-15 18:47:06,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-15 18:47:06,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2023-02-15 18:47:06,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 18:47:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2023-02-15 18:47:06,855 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 46 [2023-02-15 18:47:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:06,856 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2023-02-15 18:47:06,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 18:47:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2023-02-15 18:47:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 18:47:06,857 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:06,857 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:06,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:07,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:07,058 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1847143947, now seen corresponding path program 2 times [2023-02-15 18:47:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:07,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700894064] [2023-02-15 18:47:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:07,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:07,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:07,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220143454] [2023-02-15 18:47:07,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:47:07,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:07,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:07,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:07,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 18:47:07,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:47:07,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:07,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:47:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 18:47:07,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 18:47:07,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:07,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700894064] [2023-02-15 18:47:07,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:07,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220143454] [2023-02-15 18:47:07,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220143454] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:07,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:07,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 18:47:07,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569374310] [2023-02-15 18:47:07,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:07,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 18:47:07,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:07,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 18:47:07,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:47:07,269 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:07,435 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2023-02-15 18:47:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 18:47:07,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2023-02-15 18:47:07,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:07,437 INFO L225 Difference]: With dead ends: 150 [2023-02-15 18:47:07,437 INFO L226 Difference]: Without dead ends: 123 [2023-02-15 18:47:07,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-15 18:47:07,438 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 76 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:07,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 185 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:47:07,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-15 18:47:07,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2023-02-15 18:47:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 75 states have internal predecessors, (83), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-15 18:47:07,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2023-02-15 18:47:07,451 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 48 [2023-02-15 18:47:07,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:07,451 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2023-02-15 18:47:07,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:07,452 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2023-02-15 18:47:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 18:47:07,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:07,452 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:07,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:07,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:07,659 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:07,660 INFO L85 PathProgramCache]: Analyzing trace with hash 741894005, now seen corresponding path program 3 times [2023-02-15 18:47:07,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:07,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055339864] [2023-02-15 18:47:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:07,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:07,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:07,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89049535] [2023-02-15 18:47:07,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:47:07,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:07,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:07,678 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:07,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 18:47:07,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 18:47:07,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:07,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-15 18:47:07,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:07,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 18:47:08,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:08,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 40 [2023-02-15 18:47:08,072 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-15 18:47:08,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 31 [2023-02-15 18:47:08,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:47:08,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 38 [2023-02-15 18:47:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 18:47:08,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:12,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:12,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055339864] [2023-02-15 18:47:12,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:12,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89049535] [2023-02-15 18:47:12,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89049535] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:47:12,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:47:12,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-15 18:47:12,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502702030] [2023-02-15 18:47:12,599 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:12,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 18:47:12,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:12,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 18:47:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=525, Unknown=1, NotChecked=0, Total=650 [2023-02-15 18:47:12,601 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:47:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:13,120 INFO L93 Difference]: Finished difference Result 140 states and 178 transitions. [2023-02-15 18:47:13,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 18:47:13,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2023-02-15 18:47:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:13,123 INFO L225 Difference]: With dead ends: 140 [2023-02-15 18:47:13,123 INFO L226 Difference]: Without dead ends: 132 [2023-02-15 18:47:13,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=259, Invalid=1072, Unknown=1, NotChecked=0, Total=1332 [2023-02-15 18:47:13,124 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:13,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 159 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 18:47:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-15 18:47:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 108. [2023-02-15 18:47:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.12987012987013) internal successors, (87), 79 states have internal predecessors, (87), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-15 18:47:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 137 transitions. [2023-02-15 18:47:13,138 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 137 transitions. Word has length 48 [2023-02-15 18:47:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:13,139 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 137 transitions. [2023-02-15 18:47:13,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:47:13,139 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 137 transitions. [2023-02-15 18:47:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 18:47:13,140 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:13,140 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:13,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:13,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:13,345 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:13,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:13,345 INFO L85 PathProgramCache]: Analyzing trace with hash 48801527, now seen corresponding path program 4 times [2023-02-15 18:47:13,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:13,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516056504] [2023-02-15 18:47:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:13,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:13,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:13,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479264936] [2023-02-15 18:47:13,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:47:13,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:13,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:13,369 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:13,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 18:47:13,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:47:13,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:13,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-15 18:47:13,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:13,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 18:47:13,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:13,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 18:47:13,471 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-15 18:47:13,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-15 18:47:13,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 64 treesize of output 53 [2023-02-15 18:47:14,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:14,521 INFO L321 Elim1Store]: treesize reduction 64, result has 47.1 percent of original size [2023-02-15 18:47:14,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 93 [2023-02-15 18:47:14,954 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:47:14,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:14,956 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:47:14,978 INFO L321 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2023-02-15 18:47:14,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 111 treesize of output 67 [2023-02-15 18:47:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 18:47:15,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:16,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:16,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516056504] [2023-02-15 18:47:16,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:16,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479264936] [2023-02-15 18:47:16,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479264936] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:47:16,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:47:16,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-15 18:47:16,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164513259] [2023-02-15 18:47:16,163 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 18:47:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 18:47:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 18:47:16,165 INFO L87 Difference]: Start difference. First operand 108 states and 137 transitions. Second operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:47:17,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:17,095 INFO L93 Difference]: Finished difference Result 153 states and 190 transitions. [2023-02-15 18:47:17,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 18:47:17,096 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2023-02-15 18:47:17,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:17,097 INFO L225 Difference]: With dead ends: 153 [2023-02-15 18:47:17,097 INFO L226 Difference]: Without dead ends: 149 [2023-02-15 18:47:17,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=282, Invalid=1698, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 18:47:17,098 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 41 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:17,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 297 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 18:47:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-15 18:47:17,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 133. [2023-02-15 18:47:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 96 states have (on average 1.125) internal successors, (108), 98 states have internal predecessors, (108), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2023-02-15 18:47:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 166 transitions. [2023-02-15 18:47:17,114 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 166 transitions. Word has length 50 [2023-02-15 18:47:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:17,114 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 166 transitions. [2023-02-15 18:47:17,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:47:17,114 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 166 transitions. [2023-02-15 18:47:17,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 18:47:17,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:17,115 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:17,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:17,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:17,323 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:17,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash -293138951, now seen corresponding path program 5 times [2023-02-15 18:47:17,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:17,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237781072] [2023-02-15 18:47:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:17,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:17,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:17,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689328085] [2023-02-15 18:47:17,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:47:17,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:17,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:17,338 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:17,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 18:47:17,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-15 18:47:17,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:47:17,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 18:47:17,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 18:47:17,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:17,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237781072] [2023-02-15 18:47:17,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:17,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689328085] [2023-02-15 18:47:17,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689328085] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:17,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:17,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-15 18:47:17,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815108688] [2023-02-15 18:47:17,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:17,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 18:47:17,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:17,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 18:47:17,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-15 18:47:17,547 INFO L87 Difference]: Start difference. First operand 133 states and 166 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:17,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:17,929 INFO L93 Difference]: Finished difference Result 304 states and 384 transitions. [2023-02-15 18:47:17,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 18:47:17,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2023-02-15 18:47:17,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:17,930 INFO L225 Difference]: With dead ends: 304 [2023-02-15 18:47:17,930 INFO L226 Difference]: Without dead ends: 227 [2023-02-15 18:47:17,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2023-02-15 18:47:17,931 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 155 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:17,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 239 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 18:47:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-02-15 18:47:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 192. [2023-02-15 18:47:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 134 states have (on average 1.1194029850746268) internal successors, (150), 136 states have internal predecessors, (150), 49 states have call successors, (49), 8 states have call predecessors, (49), 8 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2023-02-15 18:47:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 248 transitions. [2023-02-15 18:47:17,956 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 248 transitions. Word has length 52 [2023-02-15 18:47:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:17,956 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 248 transitions. [2023-02-15 18:47:17,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 248 transitions. [2023-02-15 18:47:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 18:47:17,957 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:17,957 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:17,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:18,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-15 18:47:18,162 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:18,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:18,163 INFO L85 PathProgramCache]: Analyzing trace with hash 986268537, now seen corresponding path program 6 times [2023-02-15 18:47:18,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:18,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249203322] [2023-02-15 18:47:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:18,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:18,178 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:18,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267900888] [2023-02-15 18:47:18,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:47:18,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:18,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:18,181 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:18,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 18:47:18,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-02-15 18:47:18,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:47:18,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 18:47:18,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 18:47:18,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:18,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249203322] [2023-02-15 18:47:18,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:18,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267900888] [2023-02-15 18:47:18,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267900888] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:18,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:18,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-15 18:47:18,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621044182] [2023-02-15 18:47:18,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:18,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 18:47:18,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 18:47:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-15 18:47:18,427 INFO L87 Difference]: Start difference. First operand 192 states and 248 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:18,744 INFO L93 Difference]: Finished difference Result 217 states and 272 transitions. [2023-02-15 18:47:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 18:47:18,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2023-02-15 18:47:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:18,745 INFO L225 Difference]: With dead ends: 217 [2023-02-15 18:47:18,746 INFO L226 Difference]: Without dead ends: 213 [2023-02-15 18:47:18,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-02-15 18:47:18,746 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 82 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:18,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 261 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 18:47:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-02-15 18:47:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 193. [2023-02-15 18:47:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 137 states have internal predecessors, (151), 49 states have call successors, (49), 8 states have call predecessors, (49), 8 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2023-02-15 18:47:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 249 transitions. [2023-02-15 18:47:18,773 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 249 transitions. Word has length 52 [2023-02-15 18:47:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:18,774 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 249 transitions. [2023-02-15 18:47:18,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 249 transitions. [2023-02-15 18:47:18,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 18:47:18,775 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:18,775 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:18,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:18,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 18:47:18,980 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:18,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1330474501, now seen corresponding path program 7 times [2023-02-15 18:47:18,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:18,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140295506] [2023-02-15 18:47:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:18,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:19,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:19,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117604499] [2023-02-15 18:47:19,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:47:19,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:19,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:19,012 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:19,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 18:47:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:47:19,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-15 18:47:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:19,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 18:47:19,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:19,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 18:47:19,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-15 18:47:19,175 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-15 18:47:19,180 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-15 18:47:19,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 64 treesize of output 53 [2023-02-15 18:47:19,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2023-02-15 18:47:20,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:20,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:20,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:20,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:20,523 INFO L321 Elim1Store]: treesize reduction 98, result has 47.0 percent of original size [2023-02-15 18:47:20,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 129 [2023-02-15 18:47:21,338 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2023-02-15 18:47:21,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2023-02-15 18:47:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 18:47:21,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:23,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:23,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140295506] [2023-02-15 18:47:23,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:23,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117604499] [2023-02-15 18:47:23,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117604499] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:47:23,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:47:23,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-02-15 18:47:23,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679871702] [2023-02-15 18:47:23,119 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:23,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 18:47:23,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:23,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 18:47:23,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 18:47:23,121 INFO L87 Difference]: Start difference. First operand 193 states and 249 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:47:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:25,433 INFO L93 Difference]: Finished difference Result 237 states and 302 transitions. [2023-02-15 18:47:25,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 18:47:25,434 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2023-02-15 18:47:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:25,435 INFO L225 Difference]: With dead ends: 237 [2023-02-15 18:47:25,435 INFO L226 Difference]: Without dead ends: 233 [2023-02-15 18:47:25,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=442, Invalid=3718, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 18:47:25,436 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 117 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:25,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 329 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 18:47:25,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-15 18:47:25,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 214. [2023-02-15 18:47:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 151 states have (on average 1.119205298013245) internal successors, (169), 153 states have internal predecessors, (169), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2023-02-15 18:47:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 275 transitions. [2023-02-15 18:47:25,465 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 275 transitions. Word has length 54 [2023-02-15 18:47:25,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:25,465 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 275 transitions. [2023-02-15 18:47:25,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:47:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 275 transitions. [2023-02-15 18:47:25,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 18:47:25,466 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:25,466 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:25,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:25,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 18:47:25,671 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:25,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1367492605, now seen corresponding path program 8 times [2023-02-15 18:47:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:25,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842533206] [2023-02-15 18:47:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:25,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:25,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:25,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589737233] [2023-02-15 18:47:25,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:47:25,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:25,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:25,684 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:25,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 18:47:25,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:47:25,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:25,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 18:47:25,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 18:47:25,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 18:47:25,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:25,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842533206] [2023-02-15 18:47:25,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:25,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589737233] [2023-02-15 18:47:25,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589737233] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:25,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:25,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-15 18:47:25,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379589156] [2023-02-15 18:47:25,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:25,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 18:47:25,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:25,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 18:47:25,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-15 18:47:25,906 INFO L87 Difference]: Start difference. First operand 214 states and 275 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:26,399 INFO L93 Difference]: Finished difference Result 503 states and 654 transitions. [2023-02-15 18:47:26,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 18:47:26,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2023-02-15 18:47:26,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:26,407 INFO L225 Difference]: With dead ends: 503 [2023-02-15 18:47:26,408 INFO L226 Difference]: Without dead ends: 361 [2023-02-15 18:47:26,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2023-02-15 18:47:26,409 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 312 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:26,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 274 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 18:47:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-02-15 18:47:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 295. [2023-02-15 18:47:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 203 states have (on average 1.1231527093596059) internal successors, (228), 205 states have internal predecessors, (228), 81 states have call successors, (81), 10 states have call predecessors, (81), 10 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2023-02-15 18:47:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 390 transitions. [2023-02-15 18:47:26,446 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 390 transitions. Word has length 56 [2023-02-15 18:47:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:26,447 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 390 transitions. [2023-02-15 18:47:26,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 390 transitions. [2023-02-15 18:47:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 18:47:26,447 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:26,448 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:26,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:26,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 18:47:26,661 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:26,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:26,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1777525379, now seen corresponding path program 9 times [2023-02-15 18:47:26,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:26,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753559286] [2023-02-15 18:47:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:26,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:26,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:26,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031086489] [2023-02-15 18:47:26,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:47:26,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:26,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:26,677 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:26,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 18:47:26,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-15 18:47:26,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:26,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 18:47:26,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 18:47:26,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 18:47:26,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:26,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753559286] [2023-02-15 18:47:26,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:26,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031086489] [2023-02-15 18:47:26,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031086489] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:26,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:26,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-15 18:47:26,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287910097] [2023-02-15 18:47:26,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:26,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 18:47:26,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:26,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 18:47:26,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-15 18:47:26,949 INFO L87 Difference]: Start difference. First operand 295 states and 390 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:27,270 INFO L93 Difference]: Finished difference Result 330 states and 422 transitions. [2023-02-15 18:47:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 18:47:27,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2023-02-15 18:47:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:27,272 INFO L225 Difference]: With dead ends: 330 [2023-02-15 18:47:27,272 INFO L226 Difference]: Without dead ends: 326 [2023-02-15 18:47:27,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-02-15 18:47:27,273 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 152 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:27,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 342 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:47:27,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-02-15 18:47:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 297. [2023-02-15 18:47:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 205 states have (on average 1.1219512195121952) internal successors, (230), 207 states have internal predecessors, (230), 81 states have call successors, (81), 10 states have call predecessors, (81), 10 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2023-02-15 18:47:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 392 transitions. [2023-02-15 18:47:27,316 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 392 transitions. Word has length 56 [2023-02-15 18:47:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:27,317 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 392 transitions. [2023-02-15 18:47:27,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:27,317 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 392 transitions. [2023-02-15 18:47:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 18:47:27,318 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:27,318 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:27,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:27,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 18:47:27,533 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:27,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:27,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1248328447, now seen corresponding path program 10 times [2023-02-15 18:47:27,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:27,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846772604] [2023-02-15 18:47:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:27,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:27,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:27,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314135115] [2023-02-15 18:47:27,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:47:27,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:27,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:27,547 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:27,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 18:47:27,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:47:27,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:27,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 124 conjunts are in the unsatisfiable core [2023-02-15 18:47:27,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:27,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 18:47:27,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 18:47:27,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-15 18:47:27,729 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-15 18:47:27,733 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-15 18:47:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 54 treesize of output 43 [2023-02-15 18:47:27,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2023-02-15 18:47:27,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:27,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2023-02-15 18:47:29,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:29,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:29,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:29,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:29,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:29,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:29,389 INFO L321 Elim1Store]: treesize reduction 132, result has 47.0 percent of original size [2023-02-15 18:47:29,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 165 [2023-02-15 18:47:31,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:31,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:31,182 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:47:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:31,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:31,185 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:47:31,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:31,210 INFO L321 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2023-02-15 18:47:31,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 264 treesize of output 132 [2023-02-15 18:47:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 18:47:31,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:34,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:34,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846772604] [2023-02-15 18:47:34,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:34,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314135115] [2023-02-15 18:47:34,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314135115] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:47:34,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:47:34,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-02-15 18:47:34,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321143556] [2023-02-15 18:47:34,122 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:34,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 18:47:34,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:34,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 18:47:34,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2387, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 18:47:34,123 INFO L87 Difference]: Start difference. First operand 297 states and 392 transitions. Second operand has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:47:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:35,780 INFO L93 Difference]: Finished difference Result 347 states and 452 transitions. [2023-02-15 18:47:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 18:47:35,781 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 58 [2023-02-15 18:47:35,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:35,782 INFO L225 Difference]: With dead ends: 347 [2023-02-15 18:47:35,782 INFO L226 Difference]: Without dead ends: 329 [2023-02-15 18:47:35,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=442, Invalid=2864, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 18:47:35,783 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 51 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:35,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 409 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 18:47:35,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-15 18:47:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 315. [2023-02-15 18:47:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 218 states have (on average 1.1192660550458715) internal successors, (244), 220 states have internal predecessors, (244), 85 states have call successors, (85), 11 states have call predecessors, (85), 11 states have return successors, (85), 83 states have call predecessors, (85), 85 states have call successors, (85) [2023-02-15 18:47:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 414 transitions. [2023-02-15 18:47:35,822 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 414 transitions. Word has length 58 [2023-02-15 18:47:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:35,823 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 414 transitions. [2023-02-15 18:47:35,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:47:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 414 transitions. [2023-02-15 18:47:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 18:47:35,824 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:35,824 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:35,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:36,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 18:47:36,029 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:36,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1599277695, now seen corresponding path program 11 times [2023-02-15 18:47:36,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:36,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166248892] [2023-02-15 18:47:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:36,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:36,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:36,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863901522] [2023-02-15 18:47:36,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:47:36,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:36,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:36,045 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:36,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 18:47:36,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-15 18:47:36,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:36,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 18:47:36,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 18:47:36,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 18:47:36,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:36,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166248892] [2023-02-15 18:47:36,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:36,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863901522] [2023-02-15 18:47:36,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863901522] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:36,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:36,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-02-15 18:47:36,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903892034] [2023-02-15 18:47:36,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:36,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 18:47:36,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:36,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 18:47:36,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-15 18:47:36,389 INFO L87 Difference]: Start difference. First operand 315 states and 414 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:37,094 INFO L93 Difference]: Finished difference Result 492 states and 635 transitions. [2023-02-15 18:47:37,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 18:47:37,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2023-02-15 18:47:37,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:37,096 INFO L225 Difference]: With dead ends: 492 [2023-02-15 18:47:37,096 INFO L226 Difference]: Without dead ends: 430 [2023-02-15 18:47:37,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2023-02-15 18:47:37,097 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 132 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:37,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 772 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 18:47:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-02-15 18:47:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 377. [2023-02-15 18:47:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 259 states have (on average 1.1235521235521235) internal successors, (291), 261 states have internal predecessors, (291), 105 states have call successors, (105), 12 states have call predecessors, (105), 12 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2023-02-15 18:47:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 501 transitions. [2023-02-15 18:47:37,154 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 501 transitions. Word has length 60 [2023-02-15 18:47:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:37,154 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 501 transitions. [2023-02-15 18:47:37,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 501 transitions. [2023-02-15 18:47:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 18:47:37,155 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:37,155 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:37,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:37,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:37,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:37,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:37,362 INFO L85 PathProgramCache]: Analyzing trace with hash 745660931, now seen corresponding path program 12 times [2023-02-15 18:47:37,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:37,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508754534] [2023-02-15 18:47:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:37,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:37,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:37,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601698390] [2023-02-15 18:47:37,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:47:37,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:37,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:37,380 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:37,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 18:47:37,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-15 18:47:37,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:37,665 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 128 conjunts are in the unsatisfiable core [2023-02-15 18:47:37,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:37,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 18:47:37,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 18:47:37,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-15 18:47:37,707 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-15 18:47:37,711 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-15 18:47:37,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2023-02-15 18:47:37,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2023-02-15 18:47:37,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,771 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 41 treesize of output 46 [2023-02-15 18:47:37,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2023-02-15 18:47:37,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,845 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 34 [2023-02-15 18:47:37,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 70 [2023-02-15 18:47:37,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 69 [2023-02-15 18:47:37,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,946 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 46 [2023-02-15 18:47:37,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:37,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 94 [2023-02-15 18:47:38,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 89 [2023-02-15 18:47:38,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 61 [2023-02-15 18:47:38,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:38,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 124 [2023-02-15 18:47:39,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:39,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 97 [2023-02-15 18:47:39,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 61 [2023-02-15 18:47:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:39,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:39,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:39,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:39,710 INFO L321 Elim1Store]: treesize reduction 78, result has 48.7 percent of original size [2023-02-15 18:47:39,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 100 [2023-02-15 18:47:39,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:39,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:39,826 INFO L321 Elim1Store]: treesize reduction 88, result has 45.7 percent of original size [2023-02-15 18:47:39,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 102 [2023-02-15 18:47:42,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:42,982 INFO L321 Elim1Store]: treesize reduction 304, result has 37.8 percent of original size [2023-02-15 18:47:42,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 12 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 366 treesize of output 346 [2023-02-15 18:47:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 50 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 18:47:46,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:49,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508754534] [2023-02-15 18:47:49,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601698390] [2023-02-15 18:47:49,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601698390] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:47:49,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:47:49,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2023-02-15 18:47:49,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765560755] [2023-02-15 18:47:49,155 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:49,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 18:47:49,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:49,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 18:47:49,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 18:47:49,158 INFO L87 Difference]: Start difference. First operand 377 states and 501 transitions. Second operand has 35 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:47:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:52,695 INFO L93 Difference]: Finished difference Result 428 states and 561 transitions. [2023-02-15 18:47:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 18:47:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 62 [2023-02-15 18:47:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:52,698 INFO L225 Difference]: With dead ends: 428 [2023-02-15 18:47:52,698 INFO L226 Difference]: Without dead ends: 424 [2023-02-15 18:47:52,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=401, Invalid=2905, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 18:47:52,700 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 56 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:52,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 486 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1766 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-15 18:47:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-02-15 18:47:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 398. [2023-02-15 18:47:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 275 states have (on average 1.1236363636363635) internal successors, (309), 277 states have internal predecessors, (309), 109 states have call successors, (109), 13 states have call predecessors, (109), 13 states have return successors, (109), 107 states have call predecessors, (109), 109 states have call successors, (109) [2023-02-15 18:47:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 527 transitions. [2023-02-15 18:47:52,763 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 527 transitions. Word has length 62 [2023-02-15 18:47:52,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:52,763 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 527 transitions. [2023-02-15 18:47:52,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:47:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 527 transitions. [2023-02-15 18:47:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 18:47:52,765 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:52,765 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:52,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:52,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 18:47:52,972 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:52,972 INFO L85 PathProgramCache]: Analyzing trace with hash -626149883, now seen corresponding path program 13 times [2023-02-15 18:47:52,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:52,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301799995] [2023-02-15 18:47:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:52,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:52,983 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:52,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904951949] [2023-02-15 18:47:52,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:47:52,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:52,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:52,985 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:52,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 18:47:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:47:53,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 18:47:53,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 52 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 18:47:53,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 18:47:53,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:53,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301799995] [2023-02-15 18:47:53,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:53,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904951949] [2023-02-15 18:47:53,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904951949] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:53,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:53,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-02-15 18:47:53,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133070775] [2023-02-15 18:47:53,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:53,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 18:47:53,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:53,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 18:47:53,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-02-15 18:47:53,320 INFO L87 Difference]: Start difference. First operand 398 states and 527 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:54,333 INFO L93 Difference]: Finished difference Result 1128 states and 1507 transitions. [2023-02-15 18:47:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-15 18:47:54,333 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2023-02-15 18:47:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:54,336 INFO L225 Difference]: With dead ends: 1128 [2023-02-15 18:47:54,336 INFO L226 Difference]: Without dead ends: 834 [2023-02-15 18:47:54,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=1417, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 18:47:54,338 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 717 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:54,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 491 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 18:47:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-02-15 18:47:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 598. [2023-02-15 18:47:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 406 states have (on average 1.125615763546798) internal successors, (457), 408 states have internal predecessors, (457), 177 states have call successors, (177), 14 states have call predecessors, (177), 14 states have return successors, (177), 175 states have call predecessors, (177), 177 states have call successors, (177) [2023-02-15 18:47:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 811 transitions. [2023-02-15 18:47:54,430 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 811 transitions. Word has length 64 [2023-02-15 18:47:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:54,430 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 811 transitions. [2023-02-15 18:47:54,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:54,430 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 811 transitions. [2023-02-15 18:47:54,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 18:47:54,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:54,431 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:54,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-15 18:47:54,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 18:47:54,637 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:54,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:54,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1965962363, now seen corresponding path program 14 times [2023-02-15 18:47:54,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:54,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056366619] [2023-02-15 18:47:54,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:54,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:54,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:54,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861755084] [2023-02-15 18:47:54,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:47:54,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:54,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:54,656 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:54,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 18:47:54,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:47:54,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:54,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 18:47:54,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 18:47:54,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 18:47:54,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056366619] [2023-02-15 18:47:54,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861755084] [2023-02-15 18:47:54,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861755084] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:54,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:54,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-02-15 18:47:54,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19690154] [2023-02-15 18:47:54,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:54,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 18:47:54,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:54,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 18:47:54,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-02-15 18:47:55,000 INFO L87 Difference]: Start difference. First operand 598 states and 811 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:55,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:55,802 INFO L93 Difference]: Finished difference Result 677 states and 886 transitions. [2023-02-15 18:47:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 18:47:55,802 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2023-02-15 18:47:55,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:55,805 INFO L225 Difference]: With dead ends: 677 [2023-02-15 18:47:55,805 INFO L226 Difference]: Without dead ends: 673 [2023-02-15 18:47:55,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 18:47:55,806 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 191 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:55,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 612 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 18:47:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2023-02-15 18:47:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 600. [2023-02-15 18:47:55,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 408 states have (on average 1.125) internal successors, (459), 410 states have internal predecessors, (459), 177 states have call successors, (177), 14 states have call predecessors, (177), 14 states have return successors, (177), 175 states have call predecessors, (177), 177 states have call successors, (177) [2023-02-15 18:47:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 813 transitions. [2023-02-15 18:47:55,910 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 813 transitions. Word has length 64 [2023-02-15 18:47:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:55,910 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 813 transitions. [2023-02-15 18:47:55,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 18:47:55,910 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 813 transitions. [2023-02-15 18:47:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 18:47:55,911 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:55,911 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:55,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:56,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 18:47:56,117 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:56,118 INFO L85 PathProgramCache]: Analyzing trace with hash 549013255, now seen corresponding path program 15 times [2023-02-15 18:47:56,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:56,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205989383] [2023-02-15 18:47:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:56,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:56,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:56,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671803928] [2023-02-15 18:47:56,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:47:56,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:56,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:56,135 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:56,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 18:47:56,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-15 18:47:56,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:56,410 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 158 conjunts are in the unsatisfiable core [2023-02-15 18:47:56,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:56,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 18:47:56,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 18:47:56,445 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-15 18:47:56,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-15 18:47:56,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 64 treesize of output 53 [2023-02-15 18:47:56,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2023-02-15 18:47:56,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,654 INFO L321 Elim1Store]: treesize reduction 128, result has 28.5 percent of original size [2023-02-15 18:47:56,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 91 [2023-02-15 18:47:56,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,804 INFO L321 Elim1Store]: treesize reduction 188, result has 21.3 percent of original size [2023-02-15 18:47:56,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 114 treesize of output 121 [2023-02-15 18:47:56,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:56,999 INFO L321 Elim1Store]: treesize reduction 248, result has 17.1 percent of original size [2023-02-15 18:47:56,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 18 case distinctions, treesize of input 138 treesize of output 151 [2023-02-15 18:47:59,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:59,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:59,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:59,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:47:59,727 INFO L321 Elim1Store]: treesize reduction 556, result has 27.7 percent of original size [2023-02-15 18:47:59,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 14 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 42 case distinctions, treesize of input 182 treesize of output 279 [2023-02-15 18:48:12,444 WARN L233 SmtUtils]: Spent 8.85s on a formula simplification. DAG size of input: 415 DAG size of output: 402 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:48:45,998 WARN L233 SmtUtils]: Spent 11.11s on a formula simplification. DAG size of input: 399 DAG size of output: 399 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:49:14,302 WARN L233 SmtUtils]: Spent 17.61s on a formula simplification that was a NOOP. DAG size: 386 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:49:39,383 WARN L233 SmtUtils]: Spent 21.19s on a formula simplification that was a NOOP. DAG size: 377 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:50:00,413 WARN L233 SmtUtils]: Spent 17.06s on a formula simplification that was a NOOP. DAG size: 382 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:50:28,867 WARN L233 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 377 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:50:40,765 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-02-15 18:50:40,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-02-15 18:50:40,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:50:40,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205989383] [2023-02-15 18:50:40,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:50:40,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671803928] [2023-02-15 18:50:40,768 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2023-02-15 18:50:40,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 18:50:40,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:50:40,975 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:361) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:306) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 51 more [2023-02-15 18:50:40,979 INFO L158 Benchmark]: Toolchain (without parser) took 245503.39ms. Allocated memory was 119.5MB in the beginning and 524.3MB in the end (delta: 404.8MB). Free memory was 74.8MB in the beginning and 191.3MB in the end (delta: -116.5MB). Peak memory consumption was 291.8MB. Max. memory is 16.1GB. [2023-02-15 18:50:40,979 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 119.5MB. Free memory was 84.0MB in the beginning and 84.0MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 18:50:40,979 INFO L158 Benchmark]: CACSL2BoogieTranslator took 151.76ms. Allocated memory is still 119.5MB. Free memory was 74.8MB in the beginning and 63.8MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-15 18:50:40,979 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.38ms. Allocated memory is still 119.5MB. Free memory was 63.8MB in the beginning and 62.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 18:50:40,979 INFO L158 Benchmark]: Boogie Preprocessor took 14.96ms. Allocated memory is still 119.5MB. Free memory was 62.1MB in the beginning and 60.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 18:50:40,980 INFO L158 Benchmark]: RCFGBuilder took 264.05ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 60.7MB in the beginning and 114.1MB in the end (delta: -53.5MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2023-02-15 18:50:40,980 INFO L158 Benchmark]: TraceAbstraction took 245035.43ms. Allocated memory was 144.7MB in the beginning and 524.3MB in the end (delta: 379.6MB). Free memory was 113.3MB in the beginning and 191.3MB in the end (delta: -78.0MB). Peak memory consumption was 302.8MB. Max. memory is 16.1GB. [2023-02-15 18:50:40,981 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 119.5MB. Free memory was 84.0MB in the beginning and 84.0MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 151.76ms. Allocated memory is still 119.5MB. Free memory was 74.8MB in the beginning and 63.8MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.38ms. Allocated memory is still 119.5MB. Free memory was 63.8MB in the beginning and 62.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 14.96ms. Allocated memory is still 119.5MB. Free memory was 62.1MB in the beginning and 60.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 264.05ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 60.7MB in the beginning and 114.1MB in the end (delta: -53.5MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. * TraceAbstraction took 245035.43ms. Allocated memory was 144.7MB in the beginning and 524.3MB in the end (delta: 379.6MB). Free memory was 113.3MB in the beginning and 191.3MB in the end (delta: -78.0MB). Peak memory consumption was 302.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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-patterns/array4_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:50:42,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:50:42,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:50:42,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:50:42,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:50:42,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:50:42,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:50:42,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:50:42,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:50:42,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:50:42,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:50:42,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:50:42,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:50:42,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:50:42,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:50:42,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:50:42,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:50:42,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:50:42,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:50:42,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:50:42,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:50:42,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:50:42,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:50:42,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:50:42,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:50:42,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:50:42,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:50:42,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:50:42,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:50:42,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:50:42,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:50:42,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:50:42,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:50:42,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:50:42,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:50:42,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:50:42,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:50:42,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:50:42,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:50:42,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:50:42,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:50:42,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-15 18:50:42,541 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:50:42,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:50:42,542 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:50:42,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:50:42,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:50:42,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:50:42,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:50:42,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:50:42,544 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:50:42,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:50:42,544 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:50:42,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:50:42,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:50:42,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:50:42,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:50:42,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:50:42,545 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 18:50:42,545 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-15 18:50:42,545 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-15 18:50:42,545 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:50:42,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:50:42,546 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:50:42,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:50:42,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:50:42,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:50:42,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:50:42,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:50:42,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:50:42,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:50:42,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:50:42,546 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-15 18:50:42,547 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-15 18:50:42,547 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:50:42,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:50:42,547 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:50:42,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:50:42,547 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-15 18:50:42,547 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:50:42,547 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2023-02-15 18:50:42,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:50:42,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:50:42,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:50:42,819 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:50:42,819 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:50:42,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2023-02-15 18:50:43,810 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:50:43,996 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:50:43,997 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2023-02-15 18:50:44,001 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f701efc/1d5f7f8b6b0c4e218f3e828a2c053d75/FLAG7ef3ad52a [2023-02-15 18:50:44,010 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f701efc/1d5f7f8b6b0c4e218f3e828a2c053d75 [2023-02-15 18:50:44,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:50:44,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:50:44,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:50:44,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:50:44,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:50:44,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f24bb6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44, skipping insertion in model container [2023-02-15 18:50:44,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:50:44,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:50:44,145 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2023-02-15 18:50:44,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:50:44,174 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:50:44,183 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2023-02-15 18:50:44,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:50:44,219 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:50:44,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44 WrapperNode [2023-02-15 18:50:44,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:50:44,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:50:44,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:50:44,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:50:44,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,263 INFO L138 Inliner]: procedures = 18, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-02-15 18:50:44,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:50:44,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:50:44,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:50:44,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:50:44,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,299 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:50:44,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:50:44,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:50:44,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:50:44,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44" (1/1) ... [2023-02-15 18:50:44,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:50:44,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:50:44,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 18:50:44,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 18:50:44,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:50:44,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-15 18:50:44,354 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 18:50:44,354 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 18:50:44,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 18:50:44,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-02-15 18:50:44,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:50:44,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:50:44,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 18:50:44,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-02-15 18:50:44,440 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:50:44,441 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:50:44,645 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:50:44,649 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:50:44,649 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 18:50:44,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:50:44 BoogieIcfgContainer [2023-02-15 18:50:44,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:50:44,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:50:44,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:50:44,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:50:44,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:50:44" (1/3) ... [2023-02-15 18:50:44,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed09f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:50:44, skipping insertion in model container [2023-02-15 18:50:44,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:50:44" (2/3) ... [2023-02-15 18:50:44,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed09f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:50:44, skipping insertion in model container [2023-02-15 18:50:44,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:50:44" (3/3) ... [2023-02-15 18:50:44,656 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2023-02-15 18:50:44,666 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:50:44,666 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:50:44,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:50:44,697 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4dfbcae5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:50:44,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:50:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:50:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 18:50:44,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:50:44,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:50:44,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:50:44,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:50:44,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2023-02-15 18:50:44,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 18:50:44,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111121544] [2023-02-15 18:50:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:50:44,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 18:50:44,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 18:50:44,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 18:50:44,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-02-15 18:50:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:50:44,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 18:50:44,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:50:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:50:44,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:50:44,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 18:50:44,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111121544] [2023-02-15 18:50:44,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111121544] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:50:44,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:50:44,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 18:50:44,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925692796] [2023-02-15 18:50:44,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:50:44,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 18:50:44,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 18:50:44,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 18:50:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:50:44,869 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 18:50:44,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:50:44,892 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2023-02-15 18:50:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 18:50:44,894 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-15 18:50:44,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:50:44,898 INFO L225 Difference]: With dead ends: 63 [2023-02-15 18:50:44,898 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 18:50:44,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:50:44,905 INFO L413 NwaCegarLoop]: 40 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, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:50:44,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:50:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 18:50:44,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-15 18:50:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 18:50:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-02-15 18:50:44,926 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2023-02-15 18:50:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:50:44,927 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-02-15 18:50:44,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 18:50:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-02-15 18:50:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 18:50:44,928 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:50:44,928 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:50:44,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-02-15 18:50:45,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 18:50:45,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:50:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:50:45,137 INFO L85 PathProgramCache]: Analyzing trace with hash -852430543, now seen corresponding path program 1 times [2023-02-15 18:50:45,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 18:50:45,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635415451] [2023-02-15 18:50:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:50:45,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 18:50:45,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 18:50:45,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 18:50:45,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-02-15 18:50:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:50:45,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 18:50:45,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:50:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 18:50:45,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:50:45,280 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 18:50:45,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635415451] [2023-02-15 18:50:45,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635415451] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:50:45,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:50:45,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:50:45,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824761655] [2023-02-15 18:50:45,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:50:45,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:50:45,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 18:50:45,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:50:45,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:50:45,283 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:50:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:50:45,403 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2023-02-15 18:50:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:50:45,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-02-15 18:50:45,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:50:45,405 INFO L225 Difference]: With dead ends: 61 [2023-02-15 18:50:45,405 INFO L226 Difference]: Without dead ends: 39 [2023-02-15 18:50:45,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:50:45,406 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:50:45,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 59 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:50:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-15 18:50:45,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2023-02-15 18:50:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 18:50:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-02-15 18:50:45,416 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2023-02-15 18:50:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:50:45,417 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-02-15 18:50:45,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:50:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-02-15 18:50:45,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 18:50:45,418 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:50:45,418 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:50:45,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-02-15 18:50:45,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 18:50:45,625 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:50:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:50:45,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1661777169, now seen corresponding path program 1 times [2023-02-15 18:50:45,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 18:50:45,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211582421] [2023-02-15 18:50:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:50:45,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 18:50:45,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 18:50:45,627 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 18:50:45,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-02-15 18:50:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:50:45,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:50:45,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:50:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 18:50:45,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:50:45,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 18:50:45,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211582421] [2023-02-15 18:50:45,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211582421] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:50:45,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:50:45,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 18:50:45,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031872153] [2023-02-15 18:50:45,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:50:45,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 18:50:45,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 18:50:45,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 18:50:45,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 18:50:45,745 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:50:45,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:50:45,795 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2023-02-15 18:50:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 18:50:45,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-02-15 18:50:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:50:45,796 INFO L225 Difference]: With dead ends: 43 [2023-02-15 18:50:45,796 INFO L226 Difference]: Without dead ends: 39 [2023-02-15 18:50:45,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:50:45,797 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:50:45,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:50:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-15 18:50:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-15 18:50:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 18:50:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2023-02-15 18:50:45,803 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2023-02-15 18:50:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:50:45,803 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2023-02-15 18:50:45,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:50:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2023-02-15 18:50:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 18:50:45,806 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:50:45,806 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:50:45,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-02-15 18:50:46,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 18:50:46,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:50:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:50:46,018 INFO L85 PathProgramCache]: Analyzing trace with hash 813208561, now seen corresponding path program 1 times [2023-02-15 18:50:46,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 18:50:46,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034221653] [2023-02-15 18:50:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:50:46,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 18:50:46,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 18:50:46,020 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 18:50:46,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-02-15 18:50:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:50:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:50:46,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:50:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 18:50:46,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:50:46,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 18:50:46,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034221653] [2023-02-15 18:50:46,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034221653] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:50:46,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:50:46,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 18:50:46,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772544376] [2023-02-15 18:50:46,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:50:46,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 18:50:46,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 18:50:46,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 18:50:46,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:50:46,297 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:50:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:50:46,521 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2023-02-15 18:50:46,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 18:50:46,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2023-02-15 18:50:46,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:50:46,523 INFO L225 Difference]: With dead ends: 80 [2023-02-15 18:50:46,523 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 18:50:46,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-02-15 18:50:46,524 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:50:46,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 67 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:50:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 18:50:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2023-02-15 18:50:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 18:50:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-02-15 18:50:46,532 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 44 [2023-02-15 18:50:46,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:50:46,539 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-02-15 18:50:46,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:50:46,539 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-02-15 18:50:46,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 18:50:46,540 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:50:46,540 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:50:46,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-02-15 18:50:46,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 18:50:46,751 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:50:46,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:50:46,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1843316237, now seen corresponding path program 1 times [2023-02-15 18:50:46,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 18:50:46,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291491112] [2023-02-15 18:50:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:50:46,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 18:50:46,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 18:50:46,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 18:50:46,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-02-15 18:50:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:50:46,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 18:50:46,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:50:46,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 18:50:47,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 27 [2023-02-15 18:50:47,981 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:50:47,982 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:50:48,002 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2023-02-15 18:50:48,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2023-02-15 18:50:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 18:50:48,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:50:48,851 INFO L321 Elim1Store]: treesize reduction 18, result has 64.7 percent of original size [2023-02-15 18:50:48,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 506 treesize of output 402 [2023-02-15 18:50:48,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:50:48,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 402 treesize of output 390 [2023-02-15 18:50:49,099 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:50:49,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2023-02-15 18:50:53,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:50:53,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 629 treesize of output 630