./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ifeqn5.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 2e5b1d71ba93ce7431f315c72529ea116ea643f5eb9195d392455a202e45b249 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:19:35,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:19:35,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:19:35,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:19:35,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:19:35,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:19:35,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:19:35,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:19:35,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:19:35,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:19:35,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:19:35,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:19:35,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:19:35,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:19:35,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:19:35,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:19:35,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:19:35,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:19:35,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:19:35,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:19:35,080 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:19:35,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:19:35,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:19:35,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:19:35,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:19:35,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:19:35,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:19:35,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:19:35,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:19:35,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:19:35,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:19:35,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:19:35,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:19:35,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:19:35,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:19:35,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:19:35,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:19:35,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:19:35,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:19:35,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:19:35,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:19:35,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:19:35,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:19:35,103 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:19:35,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:19:35,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:19:35,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:19:35,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:19:35,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:19:35,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:19:35,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:19:35,105 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:19:35,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:19:35,105 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:19:35,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:19:35,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:19:35,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:19:35,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:19:35,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:19:35,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:19:35,106 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:19:35,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:19:35,106 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:19:35,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:19:35,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:19:35,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:19:35,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:19:35,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:19:35,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:19:35,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:19:35,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:19:35,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:19:35,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:19:35,107 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:19:35,108 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:19:35,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:19:35,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e5b1d71ba93ce7431f315c72529ea116ea643f5eb9195d392455a202e45b249 [2022-07-11 23:19:35,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:19:35,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:19:35,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:19:35,285 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:19:35,286 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:19:35,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn5.c [2022-07-11 23:19:35,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a36abd3b/845fe639369f49d19c1a8a9845a9a21e/FLAG559766487 [2022-07-11 23:19:35,682 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:19:35,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn5.c [2022-07-11 23:19:35,689 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a36abd3b/845fe639369f49d19c1a8a9845a9a21e/FLAG559766487 [2022-07-11 23:19:36,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a36abd3b/845fe639369f49d19c1a8a9845a9a21e [2022-07-11 23:19:36,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:19:36,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:19:36,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:19:36,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:19:36,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:19:36,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:19:36" (1/1) ... [2022-07-11 23:19:36,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600c1805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36, skipping insertion in model container [2022-07-11 23:19:36,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:19:36" (1/1) ... [2022-07-11 23:19:36,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:19:36,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:19:36,265 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn5.c[589,602] [2022-07-11 23:19:36,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:19:36,298 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:19:36,310 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn5.c[589,602] [2022-07-11 23:19:36,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:19:36,339 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:19:36,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36 WrapperNode [2022-07-11 23:19:36,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:19:36,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:19:36,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:19:36,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:19:36,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36" (1/1) ... [2022-07-11 23:19:36,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36" (1/1) ... [2022-07-11 23:19:36,380 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-07-11 23:19:36,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:19:36,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:19:36,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:19:36,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:19:36,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36" (1/1) ... [2022-07-11 23:19:36,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36" (1/1) ... [2022-07-11 23:19:36,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36" (1/1) ... [2022-07-11 23:19:36,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36" (1/1) ... [2022-07-11 23:19:36,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36" (1/1) ... [2022-07-11 23:19:36,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36" (1/1) ... [2022-07-11 23:19:36,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36" (1/1) ... [2022-07-11 23:19:36,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:19:36,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:19:36,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:19:36,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:19:36,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36" (1/1) ... [2022-07-11 23:19:36,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:19:36,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:19:36,442 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) [2022-07-11 23:19:36,443 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 [2022-07-11 23:19:36,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:19:36,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:19:36,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:19:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:19:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:19:36,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:19:36,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:19:36,528 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:19:36,529 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:19:36,670 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:19:36,675 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:19:36,684 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-11 23:19:36,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:19:36 BoogieIcfgContainer [2022-07-11 23:19:36,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:19:36,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:19:36,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:19:36,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:19:36,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:19:36" (1/3) ... [2022-07-11 23:19:36,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c872bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:19:36, skipping insertion in model container [2022-07-11 23:19:36,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:19:36" (2/3) ... [2022-07-11 23:19:36,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c872bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:19:36, skipping insertion in model container [2022-07-11 23:19:36,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:19:36" (3/3) ... [2022-07-11 23:19:36,692 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn5.c [2022-07-11 23:19:36,716 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:19:36,716 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:19:36,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:19:36,782 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@683b942e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c2bb313 [2022-07-11 23:19:36,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:19:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-11 23:19:36,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:19:36,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:19:36,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:19:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:19:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2022-07-11 23:19:36,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:19:36,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549815882] [2022-07-11 23:19:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:36,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:19:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:19:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:19:36,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:19:36,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549815882] [2022-07-11 23:19:36,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549815882] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:19:36,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:19:36,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 23:19:36,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127335477] [2022-07-11 23:19:36,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:19:36,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 23:19:36,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:19:36,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 23:19:36,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:19:36,971 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:19:36,983 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-07-11 23:19:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 23:19:36,984 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-11 23:19:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:19:36,990 INFO L225 Difference]: With dead ends: 42 [2022-07-11 23:19:36,990 INFO L226 Difference]: Without dead ends: 19 [2022-07-11 23:19:36,991 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 [2022-07-11 23:19:36,994 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:19:36,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:19:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-11 23:19:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-11 23:19:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-11 23:19:37,013 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-07-11 23:19:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:19:37,014 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-11 23:19:37,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-11 23:19:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-11 23:19:37,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:19:37,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:19:37,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:19:37,015 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:19:37,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:19:37,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2022-07-11 23:19:37,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:19:37,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352843703] [2022-07-11 23:19:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:37,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:19:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:19:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:19:37,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:19:37,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352843703] [2022-07-11 23:19:37,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352843703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:19:37,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:19:37,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:19:37,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355132456] [2022-07-11 23:19:37,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:19:37,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:19:37,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:19:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:19:37,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:19:37,079 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:19:37,136 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-07-11 23:19:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:19:37,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-11 23:19:37,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:19:37,139 INFO L225 Difference]: With dead ends: 45 [2022-07-11 23:19:37,139 INFO L226 Difference]: Without dead ends: 31 [2022-07-11 23:19:37,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:19:37,140 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:19:37,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:19:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-11 23:19:37,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-07-11 23:19:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-11 23:19:37,151 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-07-11 23:19:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:19:37,152 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-11 23:19:37,152 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) [2022-07-11 23:19:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-11 23:19:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-11 23:19:37,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:19:37,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:19:37,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:19:37,154 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:19:37,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:19:37,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2022-07-11 23:19:37,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:19:37,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198410990] [2022-07-11 23:19:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:37,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:19:37,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:19:37,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073501296] [2022-07-11 23:19:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:37,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:19:37,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:19:37,176 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) [2022-07-11 23:19:37,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:19:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:19:37,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-11 23:19:37,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:19:37,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:19:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:19:37,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:19:37,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:19:37,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198410990] [2022-07-11 23:19:37,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:19:37,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073501296] [2022-07-11 23:19:37,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073501296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:19:37,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:19:37,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:19:37,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911487355] [2022-07-11 23:19:37,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:19:37,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:19:37,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:19:37,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:19:37,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:19:37,341 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:37,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:19:37,407 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-07-11 23:19:37,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:19:37,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-11 23:19:37,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:19:37,409 INFO L225 Difference]: With dead ends: 40 [2022-07-11 23:19:37,409 INFO L226 Difference]: Without dead ends: 38 [2022-07-11 23:19:37,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:19:37,410 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:19:37,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:19:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-11 23:19:37,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-07-11 23:19:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-07-11 23:19:37,414 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2022-07-11 23:19:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:19:37,414 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-07-11 23:19:37,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:37,415 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-07-11 23:19:37,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-11 23:19:37,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:19:37,416 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:19:37,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 23:19:37,631 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 [2022-07-11 23:19:37,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:19:37,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:19:37,632 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2022-07-11 23:19:37,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:19:37,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601189450] [2022-07-11 23:19:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:37,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:19:37,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:19:37,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629054572] [2022-07-11 23:19:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:37,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:19:37,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:19:37,668 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) [2022-07-11 23:19:37,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:19:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:19:37,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:19:37,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:19:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:19:37,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:19:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:19:37,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:19:37,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601189450] [2022-07-11 23:19:37,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:19:37,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629054572] [2022-07-11 23:19:37,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629054572] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:19:37,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:19:37,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-11 23:19:37,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955372563] [2022-07-11 23:19:37,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:19:37,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:19:37,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:19:37,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:19:37,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:19:37,796 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:37,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:19:37,889 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-07-11 23:19:37,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:19:37,890 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-11 23:19:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:19:37,890 INFO L225 Difference]: With dead ends: 70 [2022-07-11 23:19:37,891 INFO L226 Difference]: Without dead ends: 43 [2022-07-11 23:19:37,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:19:37,892 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:19:37,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:19:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-11 23:19:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-07-11 23:19:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-11 23:19:37,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-07-11 23:19:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:19:37,904 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-11 23:19:37,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-11 23:19:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-11 23:19:37,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:19:37,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:19:37,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:19:38,119 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 [2022-07-11 23:19:38,119 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:19:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:19:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2022-07-11 23:19:38,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:19:38,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003669183] [2022-07-11 23:19:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:38,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:19:38,155 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:19:38,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498637681] [2022-07-11 23:19:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:38,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:19:38,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:19:38,157 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) [2022-07-11 23:19:38,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:19:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:19:38,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 23:19:38,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:19:38,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:19:38,293 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-11 23:19:38,293 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 [2022-07-11 23:19:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:19:38,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:19:38,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-11 23:19:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 23:19:38,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:19:38,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003669183] [2022-07-11 23:19:38,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:19:38,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498637681] [2022-07-11 23:19:38,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498637681] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:19:38,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:19:38,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2022-07-11 23:19:38,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098850569] [2022-07-11 23:19:38,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:19:38,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:19:38,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:19:38,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:19:38,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:19:38,464 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:19:38,583 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-07-11 23:19:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:19:38,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-11 23:19:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:19:38,584 INFO L225 Difference]: With dead ends: 73 [2022-07-11 23:19:38,585 INFO L226 Difference]: Without dead ends: 61 [2022-07-11 23:19:38,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:19:38,585 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:19:38,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 71 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-07-11 23:19:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-11 23:19:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2022-07-11 23:19:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-07-11 23:19:38,590 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2022-07-11 23:19:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:19:38,590 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-07-11 23:19:38,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-07-11 23:19:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 23:19:38,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:19:38,591 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:19:38,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:19:38,794 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 [2022-07-11 23:19:38,794 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:19:38,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:19:38,795 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2022-07-11 23:19:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:19:38,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456576653] [2022-07-11 23:19:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:38,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:19:38,818 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:19:38,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677556555] [2022-07-11 23:19:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:38,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:19:38,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:19:38,823 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) [2022-07-11 23:19:38,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:19:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:19:38,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-11 23:19:38,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:19:38,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:19:38,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:19:38,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:38,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-11 23:19:39,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-11 23:19:39,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:39,072 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:19:39,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-07-11 23:19:39,197 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-11 23:19:39,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 38 [2022-07-11 23:19:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:19:39,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:19:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:19:39,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:19:39,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456576653] [2022-07-11 23:19:39,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:19:39,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677556555] [2022-07-11 23:19:39,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677556555] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:19:39,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:19:39,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-07-11 23:19:39,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874124458] [2022-07-11 23:19:39,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:19:39,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 23:19:39,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:19:39,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 23:19:39,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-07-11 23:19:39,695 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:16,710 WARN L233 SmtUtils]: Spent 23.50s on a formula simplification. DAG size of input: 89 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 23:20:17,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:20:17,478 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2022-07-11 23:20:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-11 23:20:17,479 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-11 23:20:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:20:17,481 INFO L225 Difference]: With dead ends: 124 [2022-07-11 23:20:17,481 INFO L226 Difference]: Without dead ends: 93 [2022-07-11 23:20:17,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=249, Invalid=1082, Unknown=1, NotChecked=0, Total=1332 [2022-07-11 23:20:17,484 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:20:17,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 76 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 221 Invalid, 0 Unknown, 77 Unchecked, 0.4s Time] [2022-07-11 23:20:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-11 23:20:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2022-07-11 23:20:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 77 states have internal predecessors, (95), 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) [2022-07-11 23:20:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2022-07-11 23:20:17,493 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 28 [2022-07-11 23:20:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:20:17,493 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2022-07-11 23:20:17,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:17,494 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2022-07-11 23:20:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:20:17,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:20:17,495 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:20:17,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:20:17,708 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 [2022-07-11 23:20:17,708 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:20:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:20:17,709 INFO L85 PathProgramCache]: Analyzing trace with hash -849177916, now seen corresponding path program 2 times [2022-07-11 23:20:17,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:20:17,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745297857] [2022-07-11 23:20:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:20:17,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:20:17,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:20:17,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334363511] [2022-07-11 23:20:17,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:20:17,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:20:17,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:20:17,742 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) [2022-07-11 23:20:17,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:20:17,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:20:17,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:20:17,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 23:20:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:20:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 23:20:17,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:20:17,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:20:17,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745297857] [2022-07-11 23:20:17,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:20:17,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334363511] [2022-07-11 23:20:17,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334363511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:20:17,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:20:17,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:20:17,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227349078] [2022-07-11 23:20:17,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:20:17,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:20:17,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:20:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:20:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:20:17,809 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:20:17,853 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2022-07-11 23:20:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:20:17,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-11 23:20:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:20:17,854 INFO L225 Difference]: With dead ends: 121 [2022-07-11 23:20:17,855 INFO L226 Difference]: Without dead ends: 80 [2022-07-11 23:20:17,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:20:17,855 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:20:17,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:20:17,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-11 23:20:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2022-07-11 23:20:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-07-11 23:20:17,863 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 30 [2022-07-11 23:20:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:20:17,863 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-07-11 23:20:17,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-07-11 23:20:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:20:17,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:20:17,864 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:20:17,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 23:20:18,080 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 [2022-07-11 23:20:18,081 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:20:18,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:20:18,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1242204926, now seen corresponding path program 3 times [2022-07-11 23:20:18,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:20:18,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630272275] [2022-07-11 23:20:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:20:18,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:20:18,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:20:18,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446920930] [2022-07-11 23:20:18,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:20:18,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:20:18,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:20:18,120 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) [2022-07-11 23:20:18,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 23:20:18,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-11 23:20:18,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:20:18,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 23:20:18,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:20:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 23:20:18,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:20:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 23:20:18,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:20:18,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630272275] [2022-07-11 23:20:18,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:20:18,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446920930] [2022-07-11 23:20:18,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446920930] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:20:18,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:20:18,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-07-11 23:20:18,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755438361] [2022-07-11 23:20:18,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:20:18,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-11 23:20:18,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:20:18,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-11 23:20:18,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:20:18,416 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 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) [2022-07-11 23:20:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:20:18,642 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2022-07-11 23:20:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-11 23:20:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 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 [2022-07-11 23:20:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:20:18,643 INFO L225 Difference]: With dead ends: 133 [2022-07-11 23:20:18,643 INFO L226 Difference]: Without dead ends: 113 [2022-07-11 23:20:18,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-07-11 23:20:18,644 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 251 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:20:18,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 103 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:20:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-11 23:20:18,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 63. [2022-07-11 23:20:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-07-11 23:20:18,652 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 30 [2022-07-11 23:20:18,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:20:18,652 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-07-11 23:20:18,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 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) [2022-07-11 23:20:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-07-11 23:20:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-11 23:20:18,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:20:18,653 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:20:18,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:20:18,855 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 [2022-07-11 23:20:18,856 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:20:18,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:20:18,856 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2022-07-11 23:20:18,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:20:18,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746348624] [2022-07-11 23:20:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:20:18,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:20:18,868 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:20:18,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074111278] [2022-07-11 23:20:18,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:20:18,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:20:18,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:20:18,869 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) [2022-07-11 23:20:18,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 23:20:18,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:20:18,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:20:18,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:20:18,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:20:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 23:20:18,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:20:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 23:20:19,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:20:19,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746348624] [2022-07-11 23:20:19,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:20:19,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074111278] [2022-07-11 23:20:19,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074111278] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:20:19,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:20:19,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-11 23:20:19,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281946427] [2022-07-11 23:20:19,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:20:19,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:20:19,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:20:19,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:20:19,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:20:19,027 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:20:19,156 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-07-11 23:20:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:20:19,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-11 23:20:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:20:19,157 INFO L225 Difference]: With dead ends: 102 [2022-07-11 23:20:19,157 INFO L226 Difference]: Without dead ends: 77 [2022-07-11 23:20:19,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:20:19,158 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:20:19,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 66 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:20:19,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-11 23:20:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2022-07-11 23:20:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-07-11 23:20:19,163 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 32 [2022-07-11 23:20:19,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:20:19,164 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-07-11 23:20:19,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:19,164 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-07-11 23:20:19,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-11 23:20:19,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:20:19,164 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:20:19,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 23:20:19,371 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 [2022-07-11 23:20:19,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:20:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:20:19,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1847758638, now seen corresponding path program 4 times [2022-07-11 23:20:19,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:20:19,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840865116] [2022-07-11 23:20:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:20:19,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:20:19,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:20:19,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298168098] [2022-07-11 23:20:19,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:20:19,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:20:19,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:20:19,389 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) [2022-07-11 23:20:19,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 23:20:19,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:20:19,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:20:19,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:20:19,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:20:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:20:19,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:20:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:20:19,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:20:19,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840865116] [2022-07-11 23:20:19,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:20:19,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298168098] [2022-07-11 23:20:19,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298168098] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:20:19,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:20:19,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-11 23:20:19,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825667485] [2022-07-11 23:20:19,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:20:19,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:20:19,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:20:19,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:20:19,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:20:19,548 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:19,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:20:19,739 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-07-11 23:20:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:20:19,740 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-11 23:20:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:20:19,740 INFO L225 Difference]: With dead ends: 116 [2022-07-11 23:20:19,740 INFO L226 Difference]: Without dead ends: 103 [2022-07-11 23:20:19,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-11 23:20:19,741 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 129 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:20:19,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 115 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:20:19,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-11 23:20:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 64. [2022-07-11 23:20:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-07-11 23:20:19,748 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 33 [2022-07-11 23:20:19,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:20:19,748 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-07-11 23:20:19,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-07-11 23:20:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-11 23:20:19,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:20:19,749 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:20:19,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 23:20:19,962 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 [2022-07-11 23:20:19,963 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:20:19,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:20:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1646708229, now seen corresponding path program 3 times [2022-07-11 23:20:19,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:20:19,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903466709] [2022-07-11 23:20:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:20:19,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:20:19,975 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:20:19,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289633877] [2022-07-11 23:20:19,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:20:19,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:20:19,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:20:19,977 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) [2022-07-11 23:20:19,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 23:20:20,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-11 23:20:20,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:20:20,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-11 23:20:20,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:20:20,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:20:20,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:20:20,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:20:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:20:20,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-11 23:20:20,621 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:20:20,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 127 [2022-07-11 23:20:20,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:20:20,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 194 [2022-07-11 23:20:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:20:20,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:20:20,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:20,791 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-11 23:20:20,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 75 [2022-07-11 23:20:21,007 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-11 23:20:21,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 32 [2022-07-11 23:20:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:20:21,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:20:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:20:22,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:20:22,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903466709] [2022-07-11 23:20:22,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:20:22,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289633877] [2022-07-11 23:20:22,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289633877] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:20:22,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:20:22,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2022-07-11 23:20:22,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691404052] [2022-07-11 23:20:22,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:20:22,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-11 23:20:22,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:20:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-11 23:20:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1246, Unknown=0, NotChecked=0, Total=1560 [2022-07-11 23:20:22,670 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 40 states, 40 states have (on average 1.625) internal successors, (65), 40 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:20:23,700 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2022-07-11 23:20:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-11 23:20:23,701 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.625) internal successors, (65), 40 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-11 23:20:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:20:23,702 INFO L225 Difference]: With dead ends: 97 [2022-07-11 23:20:23,702 INFO L226 Difference]: Without dead ends: 95 [2022-07-11 23:20:23,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=528, Invalid=2228, Unknown=0, NotChecked=0, Total=2756 [2022-07-11 23:20:23,703 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:20:23,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 93 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 172 Invalid, 0 Unknown, 276 Unchecked, 0.2s Time] [2022-07-11 23:20:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-11 23:20:23,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2022-07-11 23:20:23,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 85 states have internal predecessors, (96), 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) [2022-07-11 23:20:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2022-07-11 23:20:23,721 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 34 [2022-07-11 23:20:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:20:23,722 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2022-07-11 23:20:23,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.625) internal successors, (65), 40 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:23,722 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2022-07-11 23:20:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-11 23:20:23,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:20:23,726 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:20:23,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 23:20:23,931 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 [2022-07-11 23:20:23,931 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:20:23,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:20:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash -653025448, now seen corresponding path program 4 times [2022-07-11 23:20:23,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:20:23,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440826808] [2022-07-11 23:20:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:20:23,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:20:23,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:20:23,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336585571] [2022-07-11 23:20:23,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:20:23,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:20:23,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:20:23,952 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) [2022-07-11 23:20:23,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 23:20:23,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:20:23,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:20:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-11 23:20:23,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:20:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:20:24,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:20:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:20:24,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:20:24,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440826808] [2022-07-11 23:20:24,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:20:24,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336585571] [2022-07-11 23:20:24,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336585571] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:20:24,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:20:24,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-11 23:20:24,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306666184] [2022-07-11 23:20:24,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:20:24,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:20:24,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:20:24,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:20:24,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:20:24,124 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:20:24,369 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2022-07-11 23:20:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:20:24,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-11 23:20:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:20:24,370 INFO L225 Difference]: With dead ends: 120 [2022-07-11 23:20:24,370 INFO L226 Difference]: Without dead ends: 99 [2022-07-11 23:20:24,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-07-11 23:20:24,371 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 156 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:20:24,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 111 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:20:24,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-11 23:20:24,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 61. [2022-07-11 23:20:24,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:24,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-07-11 23:20:24,378 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 34 [2022-07-11 23:20:24,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:20:24,379 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-07-11 23:20:24,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:20:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-07-11 23:20:24,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-11 23:20:24,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:20:24,381 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:20:24,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-11 23:20:24,582 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 [2022-07-11 23:20:24,582 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:20:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:20:24,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1259217666, now seen corresponding path program 5 times [2022-07-11 23:20:24,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:20:24,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449918935] [2022-07-11 23:20:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:20:24,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:20:24,595 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:20:24,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648250890] [2022-07-11 23:20:24,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:20:24,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:20:24,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:20:24,597 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) [2022-07-11 23:20:24,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 23:20:25,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-11 23:20:25,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:20:25,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-11 23:20:25,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:20:25,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:20:25,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:20:25,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-07-11 23:20:25,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:20:25,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-11 23:20:25,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 88 [2022-07-11 23:20:25,987 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 125 treesize of output 110 [2022-07-11 23:20:25,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:20:25,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:25,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 187 [2022-07-11 23:20:26,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 48 [2022-07-11 23:20:26,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 46 [2022-07-11 23:20:26,277 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:20:26,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 174 treesize of output 154 [2022-07-11 23:20:26,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:20:26,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2022-07-11 23:20:26,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 118 [2022-07-11 23:20:26,463 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:20:26,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 184 treesize of output 158 [2022-07-11 23:20:26,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:20:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 213 [2022-07-11 23:20:26,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:20:26,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:20:26,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:20:26,620 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-11 23:20:26,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 82 [2022-07-11 23:20:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:20:26,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:21:09,769 WARN L233 SmtUtils]: Spent 28.86s on a formula simplification. DAG size of input: 92 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 23:21:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:21:13,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:21:13,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449918935] [2022-07-11 23:21:13,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:21:13,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648250890] [2022-07-11 23:21:13,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648250890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:21:13,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:21:13,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 27 [2022-07-11 23:21:13,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88496785] [2022-07-11 23:21:13,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:21:13,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-11 23:21:13,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:21:13,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-11 23:21:13,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=559, Unknown=5, NotChecked=0, Total=702 [2022-07-11 23:21:13,146 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 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) [2022-07-11 23:21:39,263 WARN L233 SmtUtils]: Spent 25.22s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 23:21:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:21:48,433 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2022-07-11 23:21:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-11 23:21:48,433 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-11 23:21:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:21:48,434 INFO L225 Difference]: With dead ends: 96 [2022-07-11 23:21:48,434 INFO L226 Difference]: Without dead ends: 94 [2022-07-11 23:21:48,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 81.2s TimeCoverageRelationStatistics Valid=209, Invalid=907, Unknown=6, NotChecked=0, Total=1122 [2022-07-11 23:21:48,435 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:21:48,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 68 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 220 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-07-11 23:21:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-11 23:21:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-07-11 23:21:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 86 states have internal predecessors, (94), 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) [2022-07-11 23:21:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2022-07-11 23:21:48,443 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 36 [2022-07-11 23:21:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:21:48,444 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2022-07-11 23:21:48,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 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) [2022-07-11 23:21:48,444 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2022-07-11 23:21:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-11 23:21:48,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:21:48,444 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:21:48,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 23:21:48,650 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 [2022-07-11 23:21:48,650 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:21:48,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:21:48,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 5 times [2022-07-11 23:21:48,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:21:48,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305456261] [2022-07-11 23:21:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:21:48,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:21:48,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:21:48,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588941980] [2022-07-11 23:21:48,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:21:48,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:21:48,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:21:48,674 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) [2022-07-11 23:21:48,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 23:21:49,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-11 23:21:49,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:21:49,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-11 23:21:49,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:21:49,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:21:49,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:21:49,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-07-11 23:21:49,190 INFO L356 Elim1Store]: treesize reduction 354, result has 8.5 percent of original size [2022-07-11 23:21:49,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 98 treesize of output 150 [2022-07-11 23:21:49,274 INFO L356 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2022-07-11 23:21:49,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 34 [2022-07-11 23:21:49,310 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-11 23:21:49,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-07-11 23:21:49,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 145 [2022-07-11 23:21:49,415 INFO L356 Elim1Store]: treesize reduction 356, result has 8.0 percent of original size [2022-07-11 23:21:49,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 123 treesize of output 173 [2022-07-11 23:21:49,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:21:49,433 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 142 treesize of output 76 [2022-07-11 23:21:49,532 INFO L356 Elim1Store]: treesize reduction 70, result has 19.5 percent of original size [2022-07-11 23:21:49,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 62 [2022-07-11 23:21:49,835 INFO L356 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2022-07-11 23:21:49,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 50 [2022-07-11 23:21:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:21:49,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:22:10,752 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~b~0#1.offset| Int) (v_ArrVal_431 Int)) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_431)))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_main_~b~0#1.base|) |ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~b~0#1.base| .cse1) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse1 (+ |ULTIMATE.start_main_~b~0#1.offset| 8) (+ .cse2 1))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) .cse2)))) 30)) is different from false [2022-07-11 23:22:12,962 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (<= (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647))) (let ((.cse10 (<= (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 2147483647)) (.cse4 (not .cse5))) (and (or (and (or (forall ((|ULTIMATE.start_main_~b~0#1.offset| Int) (v_ArrVal_431 Int)) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse3 (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ 10 (select .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))))))) (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_431)))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_main_~b~0#1.base|) |ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~b~0#1.base| .cse1) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse1 (+ |ULTIMATE.start_main_~b~0#1.offset| 8) (+ .cse2 1))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) .cse2)))) 30)) .cse4) (or .cse5 (forall ((|ULTIMATE.start_main_~b~0#1.offset| Int) (v_ArrVal_431 Int)) (= 30 (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (let ((.cse9 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse9 (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) (+ 10 (select .cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))))))) (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_431)))) (let ((.cse8 (store (select .cse7 |c_ULTIMATE.start_main_~b~0#1.base|) |ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse6 (select (select (store .cse7 |c_ULTIMATE.start_main_~b~0#1.base| .cse8) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse6 (select (select (store .cse7 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse8 (+ |ULTIMATE.start_main_~b~0#1.offset| 8) (+ .cse6 1))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))))))))) (not .cse10)) (or .cse10 (and (or .cse4 (forall ((|ULTIMATE.start_main_~b~0#1.offset| Int) (v_ArrVal_431 Int)) (= 30 (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (let ((.cse14 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse14 (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ (select .cse14 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) (* 8 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)))) 10))) (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_431)))) (let ((.cse13 (store (select .cse12 |c_ULTIMATE.start_main_~b~0#1.base|) |ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse11 (select (select (store .cse12 |c_ULTIMATE.start_main_~b~0#1.base| .cse13) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse11 (select (select (store .cse12 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse13 (+ |ULTIMATE.start_main_~b~0#1.offset| 8) (+ .cse11 1))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))))))) (or (forall ((|ULTIMATE.start_main_~b~0#1.offset| Int) (v_ArrVal_431 Int)) (= 30 (let ((.cse16 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (let ((.cse18 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse18 (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) (+ (select .cse18 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) (* 8 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)))) 10))) (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_431)))) (let ((.cse17 (store (select .cse16 |c_ULTIMATE.start_main_~b~0#1.base|) |ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse15 (select (select (store .cse16 |c_ULTIMATE.start_main_~b~0#1.base| .cse17) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse15 (select (select (store .cse16 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse17 (+ |ULTIMATE.start_main_~b~0#1.offset| 8) (+ .cse15 1))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))))))) .cse5)))))) is different from false [2022-07-11 23:23:05,776 WARN L233 SmtUtils]: Spent 24.11s on a formula simplification. DAG size of input: 112 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 23:23:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 3 times theorem prover too weak. 0 trivial. 7 not checked. [2022-07-11 23:23:05,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:23:05,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305456261] [2022-07-11 23:23:05,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:23:05,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588941980] [2022-07-11 23:23:05,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588941980] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:23:05,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:23:05,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2022-07-11 23:23:05,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429685082] [2022-07-11 23:23:05,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:23:05,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-11 23:23:05,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:23:05,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-11 23:23:05,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=622, Unknown=18, NotChecked=106, Total=870 [2022-07-11 23:23:05,805 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 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) [2022-07-11 23:23:18,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:23:18,328 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-07-11 23:23:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-11 23:23:18,328 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 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) Word has length 38 [2022-07-11 23:23:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:23:18,329 INFO L225 Difference]: With dead ends: 90 [2022-07-11 23:23:18,329 INFO L226 Difference]: Without dead ends: 66 [2022-07-11 23:23:18,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 87.3s TimeCoverageRelationStatistics Valid=193, Invalid=987, Unknown=18, NotChecked=134, Total=1332 [2022-07-11 23:23:18,330 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:23:18,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 121 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 220 Invalid, 0 Unknown, 163 Unchecked, 0.6s Time] [2022-07-11 23:23:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-11 23:23:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-07-11 23:23:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 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) [2022-07-11 23:23:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-07-11 23:23:18,336 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 38 [2022-07-11 23:23:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:23:18,336 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-07-11 23:23:18,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 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) [2022-07-11 23:23:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-07-11 23:23:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-11 23:23:18,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:23:18,337 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:23:18,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 23:23:18,537 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 [2022-07-11 23:23:18,538 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:23:18,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:23:18,538 INFO L85 PathProgramCache]: Analyzing trace with hash 173090424, now seen corresponding path program 6 times [2022-07-11 23:23:18,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:23:18,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344380836] [2022-07-11 23:23:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:23:18,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:23:18,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:23:18,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220866277] [2022-07-11 23:23:18,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:23:18,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:23:18,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:23:18,558 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) [2022-07-11 23:23:18,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 23:23:19,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-11 23:23:19,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:23:19,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-11 23:23:19,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:23:19,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:23:19,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:23:19,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:23:19,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:23:19,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-11 23:23:19,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-11 23:23:19,394 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:23:19,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 127 [2022-07-11 23:23:19,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:23:19,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 194 [2022-07-11 23:23:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 110 [2022-07-11 23:23:19,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:23:19,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:23:19,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,522 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-11 23:23:19,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 75 [2022-07-11 23:23:19,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:23:19,571 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:23:19,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2022-07-11 23:23:19,702 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-11 23:23:19,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 32 [2022-07-11 23:23:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:23:19,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:23:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:23:56,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:23:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344380836] [2022-07-11 23:23:56,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:23:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220866277] [2022-07-11 23:23:56,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220866277] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:23:56,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:23:56,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 34 [2022-07-11 23:23:56,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662350809] [2022-07-11 23:23:56,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:23:56,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-11 23:23:56,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:23:56,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-11 23:23:56,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2022-07-11 23:23:56,027 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 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) [2022-07-11 23:23:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:23:57,973 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2022-07-11 23:23:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-11 23:23:57,974 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-11 23:23:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:23:57,974 INFO L225 Difference]: With dead ends: 101 [2022-07-11 23:23:57,974 INFO L226 Difference]: Without dead ends: 99 [2022-07-11 23:23:57,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2022-07-11 23:23:57,975 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:23:57,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 104 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 148 Invalid, 0 Unknown, 176 Unchecked, 0.2s Time] [2022-07-11 23:23:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-11 23:23:57,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2022-07-11 23:23:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 89 states have internal predecessors, (99), 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) [2022-07-11 23:23:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2022-07-11 23:23:57,984 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 40 [2022-07-11 23:23:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:23:57,984 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2022-07-11 23:23:57,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 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) [2022-07-11 23:23:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2022-07-11 23:23:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-11 23:23:57,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:23:57,985 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:23:57,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 23:23:58,187 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 [2022-07-11 23:23:58,188 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:23:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:23:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash -734671131, now seen corresponding path program 6 times [2022-07-11 23:23:58,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:23:58,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132607038] [2022-07-11 23:23:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:23:58,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:23:58,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:23:58,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486744548] [2022-07-11 23:23:58,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:23:58,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:23:58,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:23:58,203 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) [2022-07-11 23:23:58,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 23:24:02,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-11 23:24:02,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:24:02,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-11 23:24:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:24:02,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:24:02,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:02,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:24:02,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:02,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:24:02,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:02,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:24:02,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:02,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:24:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:24:03,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:24:03,971 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 54 treesize of output 52 [2022-07-11 23:24:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-11 23:24:04,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:24:04,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132607038] [2022-07-11 23:24:04,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:24:04,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486744548] [2022-07-11 23:24:04,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486744548] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:24:04,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:24:04,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17] total 38 [2022-07-11 23:24:04,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282859677] [2022-07-11 23:24:04,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:24:04,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-11 23:24:04,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:24:04,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-11 23:24:04,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2022-07-11 23:24:04,195 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:24:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:24:09,790 INFO L93 Difference]: Finished difference Result 251 states and 270 transitions. [2022-07-11 23:24:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-11 23:24:09,791 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-11 23:24:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:24:09,792 INFO L225 Difference]: With dead ends: 251 [2022-07-11 23:24:09,792 INFO L226 Difference]: Without dead ends: 238 [2022-07-11 23:24:09,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 60 SyntacticMatches, 26 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4468 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1937, Invalid=8163, Unknown=0, NotChecked=0, Total=10100 [2022-07-11 23:24:09,795 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 571 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 732 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:24:09,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 510 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 845 Invalid, 0 Unknown, 732 Unchecked, 1.0s Time] [2022-07-11 23:24:09,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-11 23:24:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 119. [2022-07-11 23:24:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.1271186440677967) internal successors, (133), 118 states have internal predecessors, (133), 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) [2022-07-11 23:24:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2022-07-11 23:24:09,808 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 42 [2022-07-11 23:24:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:24:09,809 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2022-07-11 23:24:09,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:24:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2022-07-11 23:24:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:24:09,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:24:09,809 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:24:09,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-11 23:24:10,016 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 [2022-07-11 23:24:10,016 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:24:10,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:24:10,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1596358930, now seen corresponding path program 7 times [2022-07-11 23:24:10,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:24:10,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904402830] [2022-07-11 23:24:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:24:10,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:24:10,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:24:10,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186233082] [2022-07-11 23:24:10,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:24:10,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:24:10,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:24:10,043 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) [2022-07-11 23:24:10,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-11 23:24:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:24:10,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-11 23:24:10,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:24:10,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:24:10,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:24:10,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-07-11 23:24:10,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:24:10,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-11 23:24:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 93 [2022-07-11 23:24:10,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2022-07-11 23:24:10,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-07-11 23:24:10,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-07-11 23:24:10,804 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:24:10,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 151 treesize of output 137 [2022-07-11 23:24:10,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:24:10,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2022-07-11 23:24:10,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 42 [2022-07-11 23:24:10,947 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:24:10,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 166 treesize of output 148 [2022-07-11 23:24:10,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:24:10,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:10,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 216 [2022-07-11 23:24:11,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:11,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:11,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:11,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:11,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:11,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:11,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:24:11,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:11,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:11,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:24:11,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:24:11,116 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-11 23:24:11,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 83 treesize of output 77 [2022-07-11 23:24:11,414 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-07-11 23:24:11,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 47 [2022-07-11 23:24:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:24:11,443 INFO L328 TraceCheckSpWp]: Computing backward predicates...