./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/poly2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-tiling/poly2.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 d98e92b0e397ee2afc9955ae7b4baaedb8be19fb7d6475412e7373cae81d62ab --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:49:48,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:49:48,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:49:48,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:49:48,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:49:48,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:49:48,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:49:48,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:49:48,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:49:48,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:49:48,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:49:48,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:49:48,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:49:48,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:49:48,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:49:48,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:49:48,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:49:48,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:49:48,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:49:48,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:49:48,450 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:49:48,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:49:48,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:49:48,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:49:48,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:49:48,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:49:48,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:49:48,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:49:48,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:49:48,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:49:48,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:49:48,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:49:48,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:49:48,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:49:48,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:49:48,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:49:48,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:49:48,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:49:48,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:49:48,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:49:48,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:49:48,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:49:48,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:49:48,499 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:49:48,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:49:48,500 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:49:48,500 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:49:48,501 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:49:48,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:49:48,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:49:48,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:49:48,502 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:49:48,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:49:48,503 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:49:48,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:49:48,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:49:48,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:49:48,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:49:48,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:49:48,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:49:48,504 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:49:48,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:49:48,506 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:49:48,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:49:48,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:49:48,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:49:48,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:49:48,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:49:48,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:49:48,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:49:48,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:49:48,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:49:48,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:49:48,508 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:49:48,508 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:49:48,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:49:48,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d98e92b0e397ee2afc9955ae7b4baaedb8be19fb7d6475412e7373cae81d62ab [2022-07-22 09:49:48,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:49:48,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:49:48,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:49:48,773 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:49:48,773 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:49:48,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/poly2.c [2022-07-22 09:49:48,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd38b4e16/17e040ebf9774913918460d128e931e8/FLAG693573cf7 [2022-07-22 09:49:49,230 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:49:49,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/poly2.c [2022-07-22 09:49:49,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd38b4e16/17e040ebf9774913918460d128e931e8/FLAG693573cf7 [2022-07-22 09:49:49,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd38b4e16/17e040ebf9774913918460d128e931e8 [2022-07-22 09:49:49,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:49:49,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:49:49,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:49:49,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:49:49,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:49:49,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:49:49" (1/1) ... [2022-07-22 09:49:49,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9dc68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49, skipping insertion in model container [2022-07-22 09:49:49,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:49:49" (1/1) ... [2022-07-22 09:49:49,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:49:49,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:49:49,869 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/poly2.c[396,409] [2022-07-22 09:49:49,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:49:49,899 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:49:49,910 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/poly2.c[396,409] [2022-07-22 09:49:49,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:49:49,938 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:49:49,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49 WrapperNode [2022-07-22 09:49:49,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:49:49,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:49:49,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:49:49,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:49:49,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49" (1/1) ... [2022-07-22 09:49:49,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49" (1/1) ... [2022-07-22 09:49:49,971 INFO L137 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-07-22 09:49:49,972 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:49:49,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:49:49,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:49:49,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:49:49,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49" (1/1) ... [2022-07-22 09:49:49,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49" (1/1) ... [2022-07-22 09:49:49,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49" (1/1) ... [2022-07-22 09:49:49,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49" (1/1) ... [2022-07-22 09:49:50,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49" (1/1) ... [2022-07-22 09:49:50,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49" (1/1) ... [2022-07-22 09:49:50,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49" (1/1) ... [2022-07-22 09:49:50,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:49:50,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:49:50,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:49:50,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:49:50,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49" (1/1) ... [2022-07-22 09:49:50,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:49:50,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:50,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 09:49:50,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 09:49:50,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:49:50,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:49:50,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:49:50,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 09:49:50,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:49:50,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:49:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:49:50,144 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:49:50,146 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:49:50,257 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:49:50,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:49:50,263 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 09:49:50,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:49:50 BoogieIcfgContainer [2022-07-22 09:49:50,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:49:50,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:49:50,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:49:50,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:49:50,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:49:49" (1/3) ... [2022-07-22 09:49:50,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b15c9a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:49:50, skipping insertion in model container [2022-07-22 09:49:50,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:49:49" (2/3) ... [2022-07-22 09:49:50,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b15c9a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:49:50, skipping insertion in model container [2022-07-22 09:49:50,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:49:50" (3/3) ... [2022-07-22 09:49:50,272 INFO L111 eAbstractionObserver]: Analyzing ICFG poly2.c [2022-07-22 09:49:50,283 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:49:50,283 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:49:50,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:49:50,327 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@14b2d572, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6aff4b6 [2022-07-22 09:49:50,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:49:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:50,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 09:49:50,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:50,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:50,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:50,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:50,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1777950591, now seen corresponding path program 1 times [2022-07-22 09:49:50,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:50,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420287661] [2022-07-22 09:49:50,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:50,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:50,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:50,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420287661] [2022-07-22 09:49:50,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420287661] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:49:50,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:49:50,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 09:49:50,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400936591] [2022-07-22 09:49:50,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:49:50,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 09:49:50,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 09:49:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:49:50,549 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:50,562 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2022-07-22 09:49:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 09:49:50,564 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 09:49:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:50,571 INFO L225 Difference]: With dead ends: 33 [2022-07-22 09:49:50,571 INFO L226 Difference]: Without dead ends: 15 [2022-07-22 09:49:50,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:49:50,577 INFO L413 NwaCegarLoop]: 22 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, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:50,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:49:50,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-22 09:49:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-22 09:49:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-22 09:49:50,606 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2022-07-22 09:49:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:50,607 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-22 09:49:50,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-22 09:49:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 09:49:50,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:50,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:50,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:49:50,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:50,610 INFO L85 PathProgramCache]: Analyzing trace with hash 747895801, now seen corresponding path program 1 times [2022-07-22 09:49:50,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:50,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058264306] [2022-07-22 09:49:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:50,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:50,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:50,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058264306] [2022-07-22 09:49:50,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058264306] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:49:50,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:49:50,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:49:50,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826185423] [2022-07-22 09:49:50,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:49:50,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:49:50,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:50,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:49:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:49:50,734 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:50,771 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-07-22 09:49:50,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:49:50,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 09:49:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:50,772 INFO L225 Difference]: With dead ends: 27 [2022-07-22 09:49:50,773 INFO L226 Difference]: Without dead ends: 17 [2022-07-22 09:49:50,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:49:50,774 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:50,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:49:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-22 09:49:50,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-07-22 09:49:50,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-22 09:49:50,778 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2022-07-22 09:49:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:50,779 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-22 09:49:50,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:50,779 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-22 09:49:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 09:49:50,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:50,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:50,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 09:49:50,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:50,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:50,781 INFO L85 PathProgramCache]: Analyzing trace with hash -483954537, now seen corresponding path program 1 times [2022-07-22 09:49:50,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:50,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655503662] [2022-07-22 09:49:50,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:50,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:50,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:49:50,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751769639] [2022-07-22 09:49:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:50,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:50,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:50,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:50,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:49:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:50,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:49:50,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:50,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:50,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655503662] [2022-07-22 09:49:50,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:49:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751769639] [2022-07-22 09:49:50,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751769639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:50,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:49:50,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-22 09:49:50,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356850422] [2022-07-22 09:49:50,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:50,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 09:49:50,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:50,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 09:49:50,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 09:49:50,947 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:51,004 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-07-22 09:49:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 09:49:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-22 09:49:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:51,006 INFO L225 Difference]: With dead ends: 29 [2022-07-22 09:49:51,006 INFO L226 Difference]: Without dead ends: 19 [2022-07-22 09:49:51,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 09:49:51,009 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:51,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 21 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:49:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-22 09:49:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-07-22 09:49:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-07-22 09:49:51,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2022-07-22 09:49:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:51,021 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-07-22 09:49:51,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-07-22 09:49:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 09:49:51,022 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:51,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:51,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 09:49:51,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:51,246 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:51,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:51,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1118844341, now seen corresponding path program 2 times [2022-07-22 09:49:51,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:51,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760128948] [2022-07-22 09:49:51,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:51,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:51,260 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:49:51,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848918902] [2022-07-22 09:49:51,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:49:51,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:51,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:51,262 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:51,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:49:51,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 09:49:51,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:51,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:49:51,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:49:51,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:49:51,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:51,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760128948] [2022-07-22 09:49:51,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:49:51,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848918902] [2022-07-22 09:49:51,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848918902] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:49:51,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:49:51,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 09:49:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877094993] [2022-07-22 09:49:51,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:49:51,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:49:51,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:51,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:49:51,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:49:51,373 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:51,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:51,407 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-07-22 09:49:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 09:49:51,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-22 09:49:51,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:51,409 INFO L225 Difference]: With dead ends: 33 [2022-07-22 09:49:51,410 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 09:49:51,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:49:51,411 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:51,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:49:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 09:49:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2022-07-22 09:49:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:51,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-22 09:49:51,421 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2022-07-22 09:49:51,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:51,421 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-22 09:49:51,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-22 09:49:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 09:49:51,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:51,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:51,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:49:51,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 09:49:51,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:51,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1181996269, now seen corresponding path program 1 times [2022-07-22 09:49:51,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:51,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796884916] [2022-07-22 09:49:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:51,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:51,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:49:51,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244735602] [2022-07-22 09:49:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:51,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:51,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:51,659 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:51,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:49:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:51,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:49:51,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:49:51,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:49:51,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:51,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796884916] [2022-07-22 09:49:51,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:49:51,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244735602] [2022-07-22 09:49:51,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244735602] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:51,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:49:51,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-07-22 09:49:51,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911115773] [2022-07-22 09:49:51,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:51,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 09:49:51,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 09:49:51,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:49:51,793 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:51,850 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-07-22 09:49:51,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 09:49:51,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-22 09:49:51,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:51,852 INFO L225 Difference]: With dead ends: 42 [2022-07-22 09:49:51,852 INFO L226 Difference]: Without dead ends: 35 [2022-07-22 09:49:51,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-22 09:49:51,853 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:51,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 21 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:49:51,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-22 09:49:51,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2022-07-22 09:49:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-07-22 09:49:51,858 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-07-22 09:49:51,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:51,859 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-07-22 09:49:51,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-07-22 09:49:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 09:49:51,860 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:51,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:51,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:49:52,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:52,072 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash -381665039, now seen corresponding path program 2 times [2022-07-22 09:49:52,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:52,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021518118] [2022-07-22 09:49:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:52,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:52,096 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:49:52,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952014473] [2022-07-22 09:49:52,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:49:52,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:52,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:52,098 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:52,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:49:52,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:49:52,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:52,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 09:49:52,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:52,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-07-22 09:49:52,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-07-22 09:49:52,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-22 09:49:52,320 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-22 09:49:52,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 09:49:52,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 101 [2022-07-22 09:49:52,437 INFO L356 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2022-07-22 09:49:52,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 141 [2022-07-22 09:49:52,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-22 09:49:52,533 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-22 09:49:52,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 09:49:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:52,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:52,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-07-22 09:49:52,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:49:53,008 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:49:53,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 96 [2022-07-22 09:49:53,071 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:49:53,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 941 treesize of output 937 [2022-07-22 09:49:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:53,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:53,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021518118] [2022-07-22 09:49:53,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:49:53,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952014473] [2022-07-22 09:49:53,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952014473] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:53,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:49:53,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2022-07-22 09:49:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903688843] [2022-07-22 09:49:53,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:53,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 09:49:53,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 09:49:53,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-22 09:49:53,241 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:53,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:53,338 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-07-22 09:49:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 09:49:53,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-22 09:49:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:53,340 INFO L225 Difference]: With dead ends: 45 [2022-07-22 09:49:53,341 INFO L226 Difference]: Without dead ends: 43 [2022-07-22 09:49:53,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-07-22 09:49:53,342 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:53,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-07-22 09:49:53,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-22 09:49:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2022-07-22 09:49:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-07-22 09:49:53,353 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2022-07-22 09:49:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:53,353 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-07-22 09:49:53,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-07-22 09:49:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 09:49:53,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:53,356 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:53,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:49:53,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:53,571 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:53,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:53,572 INFO L85 PathProgramCache]: Analyzing trace with hash -514050161, now seen corresponding path program 3 times [2022-07-22 09:49:53,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:53,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323982095] [2022-07-22 09:49:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:53,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:53,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:49:53,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436271995] [2022-07-22 09:49:53,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:49:53,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:53,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:53,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:53,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:49:53,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 09:49:53,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:53,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 09:49:53,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:53,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:53,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:53,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323982095] [2022-07-22 09:49:53,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:49:53,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436271995] [2022-07-22 09:49:53,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436271995] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:53,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:49:53,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-22 09:49:53,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824524381] [2022-07-22 09:49:53,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:53,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 09:49:53,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 09:49:53,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-22 09:49:53,799 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:54,001 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-07-22 09:49:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 09:49:54,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-22 09:49:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:54,002 INFO L225 Difference]: With dead ends: 74 [2022-07-22 09:49:54,002 INFO L226 Difference]: Without dead ends: 67 [2022-07-22 09:49:54,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:49:54,003 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 58 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:54,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 105 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:49:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-22 09:49:54,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2022-07-22 09:49:54,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-07-22 09:49:54,010 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2022-07-22 09:49:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:54,010 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-07-22 09:49:54,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:49:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-07-22 09:49:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 09:49:54,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:54,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:54,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 09:49:54,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:54,212 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:54,213 INFO L85 PathProgramCache]: Analyzing trace with hash -448018393, now seen corresponding path program 1 times [2022-07-22 09:49:54,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:54,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983010932] [2022-07-22 09:49:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:54,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:54,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:49:54,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850723212] [2022-07-22 09:49:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:54,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:54,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:54,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:54,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:49:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:54,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 09:49:54,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:54,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-07-22 09:49:54,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-22 09:49:54,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-07-22 09:49:54,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-07-22 09:49:54,415 INFO L356 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2022-07-22 09:49:54,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 97 [2022-07-22 09:49:54,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:49:54,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 11 [2022-07-22 09:49:54,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-07-22 09:49:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:49:54,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:54,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-07-22 09:49:54,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:49:54,922 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:49:54,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 96 [2022-07-22 09:49:54,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:49:54,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:49:54,956 INFO L356 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2022-07-22 09:49:54,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 43 [2022-07-22 09:49:54,974 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:49:54,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-07-22 09:50:19,933 WARN L233 SmtUtils]: Spent 24.88s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 09:50:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:19,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:19,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983010932] [2022-07-22 09:50:19,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:50:19,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850723212] [2022-07-22 09:50:19,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850723212] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:19,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:50:19,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-22 09:50:19,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795481500] [2022-07-22 09:50:19,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:19,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 09:50:19,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:19,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 09:50:19,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:50:19,949 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:20,519 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2022-07-22 09:50:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 09:50:20,519 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-22 09:50:20,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:20,521 INFO L225 Difference]: With dead ends: 78 [2022-07-22 09:50:20,521 INFO L226 Difference]: Without dead ends: 76 [2022-07-22 09:50:20,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-07-22 09:50:20,522 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 91 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:20,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 91 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 176 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-07-22 09:50:20,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-22 09:50:20,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2022-07-22 09:50:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-22 09:50:20,536 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 22 [2022-07-22 09:50:20,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:20,536 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-22 09:50:20,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:20,537 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-22 09:50:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 09:50:20,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:20,538 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:20,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 09:50:20,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:20,752 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1713393197, now seen corresponding path program 4 times [2022-07-22 09:50:20,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:20,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951579089] [2022-07-22 09:50:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:20,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:20,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:50:20,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831257273] [2022-07-22 09:50:20,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:50:20,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:20,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:20,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:50:20,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 09:50:20,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:50:20,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:20,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 09:50:20,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:50:20,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:50:20,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:20,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951579089] [2022-07-22 09:50:20,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:50:20,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831257273] [2022-07-22 09:50:20,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831257273] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:20,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:50:20,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-22 09:50:20,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958774531] [2022-07-22 09:50:20,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:20,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 09:50:20,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:20,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 09:50:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-22 09:50:20,934 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:21,030 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2022-07-22 09:50:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 09:50:21,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-22 09:50:21,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:21,032 INFO L225 Difference]: With dead ends: 95 [2022-07-22 09:50:21,032 INFO L226 Difference]: Without dead ends: 61 [2022-07-22 09:50:21,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-22 09:50:21,034 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:21,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 45 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:50:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-22 09:50:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2022-07-22 09:50:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-07-22 09:50:21,047 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 22 [2022-07-22 09:50:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:21,047 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-07-22 09:50:21,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:21,048 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-07-22 09:50:21,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 09:50:21,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:21,051 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:21,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 09:50:21,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:21,252 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:21,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1564417645, now seen corresponding path program 5 times [2022-07-22 09:50:21,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:21,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611493857] [2022-07-22 09:50:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:21,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:21,263 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:50:21,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379471474] [2022-07-22 09:50:21,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:50:21,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:21,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:21,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:50:21,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 09:50:22,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 09:50:22,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:22,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 09:50:22,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:22,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-07-22 09:50:22,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-07-22 09:50:22,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-22 09:50:22,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 66 [2022-07-22 09:50:22,409 INFO L356 Elim1Store]: treesize reduction 116, result has 10.1 percent of original size [2022-07-22 09:50:22,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 111 [2022-07-22 09:50:22,434 INFO L356 Elim1Store]: treesize reduction 209, result has 6.7 percent of original size [2022-07-22 09:50:22,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 40 [2022-07-22 09:50:22,459 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-22 09:50:22,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 09:50:22,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 101 [2022-07-22 09:50:22,515 INFO L356 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2022-07-22 09:50:22,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 141 [2022-07-22 09:50:22,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-07-22 09:50:22,585 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-07-22 09:50:22,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 95 [2022-07-22 09:50:22,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-22 09:50:22,640 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-22 09:50:22,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 09:50:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:22,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:23,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-07-22 09:50:23,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:50:23,387 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:50:23,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 96 [2022-07-22 09:50:23,434 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-07-22 09:50:23,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2038 treesize of output 2017 [2022-07-22 09:50:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:24,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:24,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611493857] [2022-07-22 09:50:24,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:50:24,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379471474] [2022-07-22 09:50:24,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379471474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:24,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:50:24,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 22 [2022-07-22 09:50:24,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419333122] [2022-07-22 09:50:24,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:24,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 09:50:24,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:24,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 09:50:24,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:50:24,784 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:24,938 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2022-07-22 09:50:24,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 09:50:24,939 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-22 09:50:24,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:24,940 INFO L225 Difference]: With dead ends: 78 [2022-07-22 09:50:24,940 INFO L226 Difference]: Without dead ends: 76 [2022-07-22 09:50:24,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-07-22 09:50:24,941 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:24,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 83 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 113 Invalid, 0 Unknown, 101 Unchecked, 0.1s Time] [2022-07-22 09:50:24,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-22 09:50:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2022-07-22 09:50:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2022-07-22 09:50:24,953 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 22 [2022-07-22 09:50:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:24,954 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2022-07-22 09:50:24,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,954 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2022-07-22 09:50:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:50:24,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:24,955 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:24,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 09:50:25,162 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,SelfDestructingSolverStorable9 [2022-07-22 09:50:25,163 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:25,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1632808959, now seen corresponding path program 2 times [2022-07-22 09:50:25,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:25,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14349265] [2022-07-22 09:50:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:25,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:25,178 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:50:25,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361297234] [2022-07-22 09:50:25,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:50:25,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:25,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:25,180 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:50:25,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 09:50:25,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:50:25,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:25,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 09:50:25,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:50:25,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:50:25,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:25,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14349265] [2022-07-22 09:50:25,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:50:25,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361297234] [2022-07-22 09:50:25,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361297234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:25,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:50:25,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-22 09:50:25,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203216888] [2022-07-22 09:50:25,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:25,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 09:50:25,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:25,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 09:50:25,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-22 09:50:25,383 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:25,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:25,553 INFO L93 Difference]: Finished difference Result 127 states and 140 transitions. [2022-07-22 09:50:25,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 09:50:25,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-22 09:50:25,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:25,554 INFO L225 Difference]: With dead ends: 127 [2022-07-22 09:50:25,554 INFO L226 Difference]: Without dead ends: 108 [2022-07-22 09:50:25,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:50:25,554 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 129 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:25,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 78 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:50:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-22 09:50:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2022-07-22 09:50:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:25,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2022-07-22 09:50:25,568 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 28 [2022-07-22 09:50:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:25,568 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2022-07-22 09:50:25,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2022-07-22 09:50:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:50:25,569 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:25,569 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:25,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 09:50:25,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:25,780 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:25,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:25,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1298792513, now seen corresponding path program 3 times [2022-07-22 09:50:25,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:25,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751272786] [2022-07-22 09:50:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:25,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:25,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:50:25,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98103866] [2022-07-22 09:50:25,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:50:25,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:25,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:25,796 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:50:25,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 09:50:25,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 09:50:25,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:25,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 09:50:25,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:50:25,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:50:26,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:26,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751272786] [2022-07-22 09:50:26,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:50:26,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98103866] [2022-07-22 09:50:26,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98103866] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:26,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:50:26,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-22 09:50:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017583183] [2022-07-22 09:50:26,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:26,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 09:50:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:26,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 09:50:26,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-22 09:50:26,054 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:26,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:26,283 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2022-07-22 09:50:26,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 09:50:26,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-22 09:50:26,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:26,284 INFO L225 Difference]: With dead ends: 110 [2022-07-22 09:50:26,284 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 09:50:26,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:50:26,285 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:26,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 113 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:50:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 09:50:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2022-07-22 09:50:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2022-07-22 09:50:26,292 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 28 [2022-07-22 09:50:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:26,293 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2022-07-22 09:50:26,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2022-07-22 09:50:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 09:50:26,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:26,294 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:26,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 09:50:26,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 09:50:26,502 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash -802396711, now seen corresponding path program 4 times [2022-07-22 09:50:26,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:26,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853962928] [2022-07-22 09:50:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:26,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:26,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:50:26,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990992168] [2022-07-22 09:50:26,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:50:26,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:26,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:26,513 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:50:26,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 09:50:26,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:50:26,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:26,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 09:50:26,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:26,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 09:50:26,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-07-22 09:50:26,721 INFO L356 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2022-07-22 09:50:26,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 97 [2022-07-22 09:50:26,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-22 09:50:26,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-07-22 09:50:26,782 INFO L356 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2022-07-22 09:50:26,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 97 [2022-07-22 09:50:26,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:26,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 11 [2022-07-22 09:50:26,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-07-22 09:50:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:26,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:27,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-07-22 09:50:27,584 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:50:27,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 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 49 treesize of output 96 [2022-07-22 09:50:27,612 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 09:50:27,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 119 [2022-07-22 09:50:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:27,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853962928] [2022-07-22 09:50:27,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:50:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990992168] [2022-07-22 09:50:27,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990992168] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:27,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:50:27,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 22 [2022-07-22 09:50:27,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642016264] [2022-07-22 09:50:27,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:27,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 09:50:27,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:27,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 09:50:27,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:50:27,635 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:27,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:27,958 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2022-07-22 09:50:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 09:50:27,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-22 09:50:27,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:27,959 INFO L225 Difference]: With dead ends: 87 [2022-07-22 09:50:27,959 INFO L226 Difference]: Without dead ends: 66 [2022-07-22 09:50:27,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-07-22 09:50:27,960 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:27,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 189 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 301 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-07-22 09:50:27,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-22 09:50:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2022-07-22 09:50:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-07-22 09:50:27,965 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 30 [2022-07-22 09:50:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:27,966 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-07-22 09:50:27,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-07-22 09:50:27,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 09:50:27,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:27,967 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:27,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-22 09:50:28,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 09:50:28,176 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash 435427615, now seen corresponding path program 5 times [2022-07-22 09:50:28,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:28,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882008145] [2022-07-22 09:50:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:28,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:28,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:50:28,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311199405] [2022-07-22 09:50:28,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:50:28,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:28,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:28,194 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:50:28,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 09:50:54,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-22 09:50:54,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 09:50:54,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:54,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-07-22 09:50:54,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-22 09:50:54,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-07-22 09:50:54,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-07-22 09:50:54,636 INFO L356 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2022-07-22 09:50:54,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 97 [2022-07-22 09:50:54,671 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:50:54,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:50:54,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-07-22 09:50:54,714 INFO L356 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2022-07-22 09:50:54,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 97 [2022-07-22 09:50:54,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 101 [2022-07-22 09:50:54,777 INFO L356 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2022-07-22 09:50:54,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 141 [2022-07-22 09:50:54,808 INFO L356 Elim1Store]: treesize reduction 63, result has 1.6 percent of original size [2022-07-22 09:50:54,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 26 [2022-07-22 09:50:54,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 64 [2022-07-22 09:50:54,862 INFO L356 Elim1Store]: treesize reduction 116, result has 10.1 percent of original size [2022-07-22 09:50:54,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 109 [2022-07-22 09:50:54,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-22 09:50:54,929 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:50:54,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:50:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:54,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:56,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-07-22 09:50:56,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:50:56,211 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:50:56,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 96 [2022-07-22 09:50:56,259 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 09:50:56,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2134 treesize of output 2105 [2022-07-22 09:50:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:56,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:56,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882008145] [2022-07-22 09:50:56,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:50:56,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311199405] [2022-07-22 09:50:56,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311199405] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:56,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:50:56,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 28 [2022-07-22 09:50:56,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946965073] [2022-07-22 09:50:56,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:56,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 09:50:56,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:56,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 09:50:56,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-07-22 09:50:56,823 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:57,140 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2022-07-22 09:50:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 09:50:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-22 09:50:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:57,141 INFO L225 Difference]: With dead ends: 92 [2022-07-22 09:50:57,141 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 09:50:57,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-07-22 09:50:57,142 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:57,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 116 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 190 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2022-07-22 09:50:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 09:50:57,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2022-07-22 09:50:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-22 09:50:57,154 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 30 [2022-07-22 09:50:57,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:57,154 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-22 09:50:57,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-22 09:50:57,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 09:50:57,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:57,155 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:57,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 09:50:57,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 09:50:57,356 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1698128091, now seen corresponding path program 6 times [2022-07-22 09:50:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:57,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391384260] [2022-07-22 09:50:57,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:57,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:57,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:50:57,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426462713] [2022-07-22 09:50:57,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:50:57,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:57,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:57,375 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:50:57,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 09:50:57,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-22 09:50:57,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:57,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 09:50:57,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:50:57,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:50:57,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:57,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391384260] [2022-07-22 09:50:57,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:50:57,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426462713] [2022-07-22 09:50:57,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426462713] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:57,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:50:57,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-07-22 09:50:57,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126992299] [2022-07-22 09:50:57,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:57,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 09:50:57,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 09:50:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-22 09:50:57,818 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:57,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:57,987 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2022-07-22 09:50:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 09:50:57,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-22 09:50:57,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:57,988 INFO L225 Difference]: With dead ends: 178 [2022-07-22 09:50:57,988 INFO L226 Difference]: Without dead ends: 150 [2022-07-22 09:50:57,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2022-07-22 09:50:57,990 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 130 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:57,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 103 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:50:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-22 09:50:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 110. [2022-07-22 09:50:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.165137614678899) internal successors, (127), 109 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 127 transitions. [2022-07-22 09:50:58,002 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 127 transitions. Word has length 30 [2022-07-22 09:50:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:58,002 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 127 transitions. [2022-07-22 09:50:58,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:58,002 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 127 transitions. [2022-07-22 09:50:58,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 09:50:58,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:58,003 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:58,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 09:50:58,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 09:50:58,204 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:58,205 INFO L85 PathProgramCache]: Analyzing trace with hash -198111323, now seen corresponding path program 7 times [2022-07-22 09:50:58,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:58,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311077338] [2022-07-22 09:50:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:58,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:58,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:50:58,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289930782] [2022-07-22 09:50:58,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:50:58,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:58,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:58,234 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:50:58,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 09:50:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:58,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 09:50:58,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:58,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:58,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:58,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311077338] [2022-07-22 09:50:58,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:50:58,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289930782] [2022-07-22 09:50:58,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289930782] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:58,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:50:58,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2022-07-22 09:50:58,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092197507] [2022-07-22 09:50:58,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:58,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 09:50:58,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:58,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 09:50:58,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-07-22 09:50:58,567 INFO L87 Difference]: Start difference. First operand 110 states and 127 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:59,171 INFO L93 Difference]: Finished difference Result 201 states and 219 transitions. [2022-07-22 09:50:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 09:50:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-22 09:50:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:59,173 INFO L225 Difference]: With dead ends: 201 [2022-07-22 09:50:59,173 INFO L226 Difference]: Without dead ends: 162 [2022-07-22 09:50:59,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 09:50:59,174 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 162 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:59,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 321 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 09:50:59,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-22 09:50:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 102. [2022-07-22 09:50:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.108910891089109) internal successors, (112), 101 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2022-07-22 09:50:59,188 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 30 [2022-07-22 09:50:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:59,189 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2022-07-22 09:50:59,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2022-07-22 09:50:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 09:50:59,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:59,190 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:59,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 09:50:59,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:59,400 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:59,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1602328771, now seen corresponding path program 8 times [2022-07-22 09:50:59,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:59,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860044666] [2022-07-22 09:50:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:59,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:59,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:50:59,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614654535] [2022-07-22 09:50:59,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:50:59,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:59,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:59,410 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:50:59,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 09:50:59,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:50:59,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:59,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 09:50:59,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:59,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:59,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:59,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860044666] [2022-07-22 09:50:59,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:50:59,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614654535] [2022-07-22 09:50:59,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614654535] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:59,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:50:59,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-07-22 09:50:59,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812462129] [2022-07-22 09:50:59,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:59,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 09:50:59,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 09:50:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-07-22 09:50:59,683 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:59,985 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2022-07-22 09:50:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 09:50:59,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-22 09:50:59,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:59,986 INFO L225 Difference]: With dead ends: 188 [2022-07-22 09:50:59,986 INFO L226 Difference]: Without dead ends: 165 [2022-07-22 09:50:59,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 09:50:59,987 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 354 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:59,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 116 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:50:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-22 09:51:00,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2022-07-22 09:51:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1009174311926606) internal successors, (120), 109 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2022-07-22 09:51:00,002 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 32 [2022-07-22 09:51:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:51:00,002 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2022-07-22 09:51:00,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2022-07-22 09:51:00,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 09:51:00,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:51:00,003 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:51:00,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 09:51:00,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 09:51:00,208 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:51:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:51:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1792792917, now seen corresponding path program 6 times [2022-07-22 09:51:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:51:00,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944624713] [2022-07-22 09:51:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:51:00,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:51:00,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:51:00,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110282035] [2022-07-22 09:51:00,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:51:00,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:51:00,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:51:00,218 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:51:00,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 09:51:00,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-22 09:51:00,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:51:00,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 09:51:00,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:51:00,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-07-22 09:51:00,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-07-22 09:51:00,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-22 09:51:00,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 66 [2022-07-22 09:51:00,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:00,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:00,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:00,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 124 [2022-07-22 09:51:00,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:00,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 09:51:00,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-07-22 09:51:00,772 INFO L356 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2022-07-22 09:51:00,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 97 [2022-07-22 09:51:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:00,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:00,799 INFO L356 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-07-22 09:51:00,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 34 [2022-07-22 09:51:00,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 103 [2022-07-22 09:51:00,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:00,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:00,888 INFO L356 Elim1Store]: treesize reduction 55, result has 1.8 percent of original size [2022-07-22 09:51:00,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 154 [2022-07-22 09:51:00,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:00,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:00,956 INFO L356 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2022-07-22 09:51:00,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 71 [2022-07-22 09:51:01,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 97 [2022-07-22 09:51:01,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:01,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:01,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:01,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:01,171 INFO L356 Elim1Store]: treesize reduction 57, result has 1.7 percent of original size [2022-07-22 09:51:01,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 158 [2022-07-22 09:51:01,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:01,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:01,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:01,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 74 [2022-07-22 09:51:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:02,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:51:05,568 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_520 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_516 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse0 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= c_~SIZE~0 (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse0)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_516)) (.cse2 (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse1 .cse2 (+ (- 2) (select .cse1 .cse2)))) (+ (* (mod (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_520) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 4) (< (+ 3 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse0) c_~SIZE~0) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647)))) (forall ((v_ArrVal_520 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_516 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse3 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= c_~SIZE~0 (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse3)) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (let ((.cse4 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_516)) (.cse5 (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse4 .cse5 (+ (- 2) (select .cse4 .cse5)))) (+ (* (mod (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_520) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 4) (< (+ 3 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse3) c_~SIZE~0) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0))))) is different from false [2022-07-22 09:51:07,847 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (<= (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647))) (and (or (not .cse0) (and (forall ((v_ArrVal_520 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_516 Int) (v_ArrVal_514 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse1 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= c_~SIZE~0 (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse1)) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (let ((.cse2 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_514) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_516)) (.cse3 (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse2 .cse3 (+ (- 2) (select .cse2 .cse3)))) (+ (* (mod (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_520) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 4) (< (+ 3 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse1) c_~SIZE~0) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0)))) (forall ((v_ArrVal_520 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_516 Int) (v_ArrVal_514 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse6 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (= (select (store (let ((.cse4 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_514) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_516)) (.cse5 (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse4 .cse5 (+ (- 2) (select .cse4 .cse5)))) (+ (* (mod (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_520) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 4) (<= c_~SIZE~0 (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse6)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (< (+ 3 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse6) c_~SIZE~0) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647)))))) (or .cse0 (and (forall ((v_ArrVal_520 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_516 Int) (v_ArrVal_514 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse7 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= c_~SIZE~0 (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse7)) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (< (+ 3 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse7) c_~SIZE~0) (= (select (store (let ((.cse8 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_514) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_516)) (.cse9 (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse8 .cse9 (+ (select .cse8 .cse9) (- 2)))) (+ (* (mod (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_520) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 4) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0)))) (forall ((v_ArrVal_520 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_516 Int) (v_ArrVal_514 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse10 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= c_~SIZE~0 (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse10)) (= (select (store (let ((.cse11 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_514) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_516)) (.cse12 (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse11 .cse12 (+ (- 2) (select .cse11 .cse12)))) (+ (* (mod (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_520) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 4) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (< (+ 3 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse10) c_~SIZE~0) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647)))))))) is different from false [2022-07-22 09:51:09,944 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_520 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_516 Int) (v_ArrVal_514 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse0 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= c_~SIZE~0 (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse0)) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (let ((.cse1 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| v_ArrVal_514) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_516)) (.cse2 (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse1 .cse2 (+ (- 2) (select .cse1 .cse2)))) (+ (* (mod (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_520) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 4) (< (+ 3 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse0) c_~SIZE~0) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0)))) (forall ((v_ArrVal_520 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_516 Int) (v_ArrVal_514 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse3 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= c_~SIZE~0 (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse3)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (let ((.cse4 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| v_ArrVal_514) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_516)) (.cse5 (+ (* (mod (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse4 .cse5 (+ (- 2) (select .cse4 .cse5)))) (+ (* (mod (+ 2 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_520) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) 4) (< (+ 3 |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse3) c_~SIZE~0) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647))))) is different from false [2022-07-22 09:51:18,273 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 09:51:32,494 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 09:51:54,746 WARN L233 SmtUtils]: Spent 17.41s on a formula simplification. DAG size of input: 101 DAG size of output: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 09:52:05,335 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 09:52:05,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-07-22 09:52:05,386 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:52:05,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 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 49 treesize of output 96 [2022-07-22 09:52:08,230 INFO L356 Elim1Store]: treesize reduction 149, result has 54.3 percent of original size [2022-07-22 09:52:08,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3322956228 treesize of output 3296562155