./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifcomp.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/ifcomp.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 0d2a65255d8b2e6b68882339bb2639d8ae744f5b340e0d3d33c067476b0c9dc7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:17:50,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:17:50,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:17:50,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:17:50,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:17:50,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:17:50,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:17:50,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:17:50,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:17:50,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:17:50,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:17:50,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:17:50,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:17:50,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:17:50,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:17:50,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:17:50,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:17:50,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:17:50,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:17:50,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:17:50,483 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:17:50,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:17:50,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:17:50,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:17:50,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:17:50,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:17:50,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:17:50,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:17:50,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:17:50,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:17:50,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:17:50,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:17:50,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:17:50,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:17:50,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:17:50,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:17:50,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:17:50,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:17:50,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:17:50,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:17:50,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:17:50,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:17:50,499 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:17:50,520 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:17:50,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:17:50,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:17:50,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:17:50,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:17:50,522 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:17:50,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:17:50,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:17:50,523 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:17:50,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:17:50,523 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:17:50,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:17:50,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:17:50,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:17:50,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:17:50,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:17:50,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:17:50,524 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:17:50,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:17:50,525 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:17:50,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:17:50,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:17:50,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:17:50,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:17:50,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:17:50,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:17:50,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:17:50,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:17:50,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:17:50,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:17:50,527 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:17:50,527 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:17:50,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:17:50,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d2a65255d8b2e6b68882339bb2639d8ae744f5b340e0d3d33c067476b0c9dc7 [2022-07-11 23:17:50,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:17:50,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:17:50,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:17:50,729 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:17:50,730 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:17:50,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifcomp.c [2022-07-11 23:17:50,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe97aa1d/a448d6d27bb84129957318d13b6600a5/FLAG5e1143075 [2022-07-11 23:17:51,157 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:17:51,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcomp.c [2022-07-11 23:17:51,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe97aa1d/a448d6d27bb84129957318d13b6600a5/FLAG5e1143075 [2022-07-11 23:17:51,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe97aa1d/a448d6d27bb84129957318d13b6600a5 [2022-07-11 23:17:51,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:17:51,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:17:51,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:17:51,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:17:51,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:17:51,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd53b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51, skipping insertion in model container [2022-07-11 23:17:51,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:17:51,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:17:51,808 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/ifcomp.c[589,602] [2022-07-11 23:17:51,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:17:51,843 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:17:51,858 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/ifcomp.c[589,602] [2022-07-11 23:17:51,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:17:51,879 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:17:51,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51 WrapperNode [2022-07-11 23:17:51,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:17:51,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:17:51,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:17:51,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:17:51,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,915 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2022-07-11 23:17:51,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:17:51,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:17:51,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:17:51,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:17:51,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:17:51,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:17:51,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:17:51,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:17:51,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:17:51,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:17:51,992 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 23:17:52,020 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 23:17:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:17:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:17:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:17:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:17:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:17:52,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:17:52,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:17:52,100 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:17:52,101 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:17:52,294 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:17:52,299 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:17:52,299 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-11 23:17:52,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:17:52 BoogieIcfgContainer [2022-07-11 23:17:52,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:17:52,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:17:52,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:17:52,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:17:52,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:17:51" (1/3) ... [2022-07-11 23:17:52,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9380cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:17:52, skipping insertion in model container [2022-07-11 23:17:52,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (2/3) ... [2022-07-11 23:17:52,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9380cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:17:52, skipping insertion in model container [2022-07-11 23:17:52,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:17:52" (3/3) ... [2022-07-11 23:17:52,308 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcomp.c [2022-07-11 23:17:52,320 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:17:52,320 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:17:52,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:17:52,365 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@58ed81fb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@b40f758 [2022-07-11 23:17:52,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:17:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 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 23:17:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-11 23:17:52,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:52,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:52,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:52,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:52,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2022-07-11 23:17:52,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:52,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753426983] [2022-07-11 23:17:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:52,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:17:52,525 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 23:17:52,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:52,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753426983] [2022-07-11 23:17:52,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753426983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:17:52,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:17:52,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 23:17:52,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381860663] [2022-07-11 23:17:52,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:17:52,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 23:17:52,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:52,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 23:17:52,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:17:52,563 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 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) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 23:17:52,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:52,580 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2022-07-11 23:17:52,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 23:17:52,582 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-11 23:17:52,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:52,620 INFO L225 Difference]: With dead ends: 50 [2022-07-11 23:17:52,621 INFO L226 Difference]: Without dead ends: 23 [2022-07-11 23:17:52,639 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 23:17:52,644 INFO L413 NwaCegarLoop]: 34 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, 34 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 23:17:52,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:17:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-11 23:17:52,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-11 23:17:52,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 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 23:17:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-07-11 23:17:52,672 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2022-07-11 23:17:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:17:52,672 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-07-11 23:17:52,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 23:17:52,674 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-07-11 23:17:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-11 23:17:52,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:52,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:52,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:17:52,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:52,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:52,677 INFO L85 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2022-07-11 23:17:52,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:52,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110629432] [2022-07-11 23:17:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:52,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:17:52,798 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 23:17:52,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:52,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110629432] [2022-07-11 23:17:52,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110629432] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:17:52,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:17:52,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:17:52,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643875449] [2022-07-11 23:17:52,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:17:52,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:17:52,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:52,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:17:52,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:17:52,805 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 23:17:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:52,888 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-07-11 23:17:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:17:52,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-11 23:17:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:52,891 INFO L225 Difference]: With dead ends: 56 [2022-07-11 23:17:52,891 INFO L226 Difference]: Without dead ends: 38 [2022-07-11 23:17:52,895 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 23:17:52,896 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:17:52,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:17:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-11 23:17:52,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-07-11 23:17:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-11 23:17:52,909 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2022-07-11 23:17:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:17:52,910 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-11 23:17:52,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 23:17:52,911 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-07-11 23:17:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-11 23:17:52,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:52,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:52,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:17:52,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:52,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:52,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2022-07-11 23:17:52,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:52,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495779190] [2022-07-11 23:17:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:52,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:52,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:17:52,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503979399] [2022-07-11 23:17:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:52,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:52,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:17:52,965 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 23:17:52,972 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 23:17:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:17:53,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-11 23:17:53,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:17:53,102 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 23:17:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:17:53,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:17:53,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:53,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495779190] [2022-07-11 23:17:53,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:17:53,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503979399] [2022-07-11 23:17:53,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503979399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:17:53,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:17:53,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:17:53,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657084152] [2022-07-11 23:17:53,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:17:53,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:17:53,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:53,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:17:53,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:17:53,180 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 23:17:53,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:53,234 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-07-11 23:17:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:17:53,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) Word has length 23 [2022-07-11 23:17:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:53,236 INFO L225 Difference]: With dead ends: 46 [2022-07-11 23:17:53,236 INFO L226 Difference]: Without dead ends: 44 [2022-07-11 23:17:53,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 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 23:17:53,237 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:17:53,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 78 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:17:53,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-11 23:17:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2022-07-11 23:17:53,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-07-11 23:17:53,243 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2022-07-11 23:17:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:17:53,243 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-07-11 23:17:53,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 23:17:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-07-11 23:17:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-11 23:17:53,244 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:53,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:53,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 23:17:53,459 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 23:17:53,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1659346963, now seen corresponding path program 1 times [2022-07-11 23:17:53,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:53,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104886812] [2022-07-11 23:17:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:53,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:53,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:17:53,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803650275] [2022-07-11 23:17:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:53,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:53,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:17:53,504 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 23:17:53,505 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 23:17:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:17:53,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:17:53,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:17:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:17:53,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:17:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:17:53,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:53,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104886812] [2022-07-11 23:17:53,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:17:53,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803650275] [2022-07-11 23:17:53,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803650275] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:17:53,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:17:53,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-11 23:17:53,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767491871] [2022-07-11 23:17:53,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:17:53,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:17:53,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:17:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:17:53,693 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 23:17:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:53,864 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-07-11 23:17:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:17:53,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) Word has length 26 [2022-07-11 23:17:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:53,866 INFO L225 Difference]: With dead ends: 92 [2022-07-11 23:17:53,867 INFO L226 Difference]: Without dead ends: 53 [2022-07-11 23:17:53,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 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 23:17:53,871 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:17:53,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 43 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:17:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-11 23:17:53,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2022-07-11 23:17:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:53,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-07-11 23:17:53,882 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2022-07-11 23:17:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:17:53,883 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-07-11 23:17:53,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 23:17:53,883 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-07-11 23:17:53,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-11 23:17:53,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:53,884 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:53,909 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 23:17:54,098 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 23:17:54,099 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:54,099 INFO L85 PathProgramCache]: Analyzing trace with hash -643446870, now seen corresponding path program 1 times [2022-07-11 23:17:54,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:54,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999241902] [2022-07-11 23:17:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:54,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:54,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:17:54,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182164354] [2022-07-11 23:17:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:54,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:54,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:17:54,130 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 23:17:54,132 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 23:17:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:17:54,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-11 23:17:54,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:17:54,281 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 23:17:54,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:17:54,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-11 23:17:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 23:17:54,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:17:54,591 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 23:17:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 23:17:54,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:54,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999241902] [2022-07-11 23:17:54,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:17:54,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182164354] [2022-07-11 23:17:54,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182164354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:17:54,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:17:54,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-11 23:17:54,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878362802] [2022-07-11 23:17:54,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:17:54,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 23:17:54,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:54,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 23:17:54,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:17:54,617 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 23:17:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:54,995 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2022-07-11 23:17:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-11 23:17:54,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 23:17:54,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:54,996 INFO L225 Difference]: With dead ends: 91 [2022-07-11 23:17:54,996 INFO L226 Difference]: Without dead ends: 79 [2022-07-11 23:17:54,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-07-11 23:17:54,997 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:17:54,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 99 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 129 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-07-11 23:17:54,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-11 23:17:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2022-07-11 23:17:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 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 23:17:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-11 23:17:55,004 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 32 [2022-07-11 23:17:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:17:55,004 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-11 23:17:55,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 23:17:55,005 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-11 23:17:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-11 23:17:55,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:55,006 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:55,034 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 23:17:55,227 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 23:17:55,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:55,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2051071008, now seen corresponding path program 1 times [2022-07-11 23:17:55,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:55,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345081637] [2022-07-11 23:17:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:55,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:17:55,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560311579] [2022-07-11 23:17:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:55,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:55,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:17:55,266 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 23:17:55,285 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 23:17:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:17:55,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-11 23:17:55,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:17:55,415 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 44 treesize of output 42 [2022-07-11 23:17:55,478 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 23:17:55,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:17:55,535 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 23:17:55,580 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 23:17:55,652 INFO L356 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-07-11 23:17:55,653 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 23:17:55,806 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-11 23:17:55,806 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 1 case distinctions, treesize of input 56 treesize of output 26 [2022-07-11 23:17:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:17:55,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:17:56,723 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~c~0#1.offset| Int)) (= (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |ULTIMATE.start_main_~c~0#1.offset| 0))) (store .cse0 (+ |ULTIMATE.start_main_~c~0#1.offset| (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8)) (let ((.cse1 (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| .cse0) |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse0 (+ |ULTIMATE.start_main_~c~0#1.offset| .cse1)))))) (+ |ULTIMATE.start_main_~c~0#1.offset| 8)) 1)) is different from false [2022-07-11 23:18:00,265 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (<= (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647))) (and (or .cse0 (forall ((v_ArrVal_177 Int) (|ULTIMATE.start_main_~c~0#1.offset| Int)) (= (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) (- 34359738368) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_177)))) (store .cse1 |c_ULTIMATE.start_main_~c~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~c~0#1.base|) |ULTIMATE.start_main_~c~0#1.offset| 0))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) (or (not .cse0) (forall ((v_ArrVal_177 Int) (|ULTIMATE.start_main_~c~0#1.offset| Int)) (= (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_177)))) (store .cse2 |c_ULTIMATE.start_main_~c~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~c~0#1.base|) |ULTIMATE.start_main_~c~0#1.offset| 0))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))))) is different from false [2022-07-11 23:18:00,837 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (<= (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 2147483647))) (and (or (not .cse0) (forall ((v_ArrVal_177 Int) (|ULTIMATE.start_main_~c~0#1.offset| Int)) (= (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_177)))) (store .cse1 |c_ULTIMATE.start_main_~c~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~c~0#1.base|) |ULTIMATE.start_main_~c~0#1.offset| 0))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) (or .cse0 (forall ((v_ArrVal_177 Int) (|ULTIMATE.start_main_~c~0#1.offset| Int)) (= (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) (- 34359738368) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_177)))) (store .cse2 |c_ULTIMATE.start_main_~c~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~c~0#1.base|) |ULTIMATE.start_main_~c~0#1.offset| 0))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))))) is different from false [2022-07-11 23:18:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 7 not checked. [2022-07-11 23:18:01,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:18:01,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345081637] [2022-07-11 23:18:01,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:18:01,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560311579] [2022-07-11 23:18:01,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560311579] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:18:01,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:18:01,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-07-11 23:18:01,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956719821] [2022-07-11 23:18:01,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:18:01,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 23:18:01,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:18:01,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 23:18:01,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=336, Unknown=6, NotChecked=120, Total=552 [2022-07-11 23:18:01,230 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 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 23:18:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:18:02,228 INFO L93 Difference]: Finished difference Result 150 states and 182 transitions. [2022-07-11 23:18:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-11 23:18:02,229 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 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) Word has length 36 [2022-07-11 23:18:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:18:02,230 INFO L225 Difference]: With dead ends: 150 [2022-07-11 23:18:02,230 INFO L226 Difference]: Without dead ends: 116 [2022-07-11 23:18:02,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=161, Invalid=601, Unknown=6, NotChecked=162, Total=930 [2022-07-11 23:18:02,231 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 89 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:18:02,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 172 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 295 Invalid, 0 Unknown, 244 Unchecked, 0.7s Time] [2022-07-11 23:18:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-11 23:18:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 68. [2022-07-11 23:18:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 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 23:18:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2022-07-11 23:18:02,241 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 36 [2022-07-11 23:18:02,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:18:02,241 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2022-07-11 23:18:02,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 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 23:18:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2022-07-11 23:18:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-11 23:18:02,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:18:02,243 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:18:02,260 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 23:18:02,447 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 23:18:02,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:18:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:18:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2062198762, now seen corresponding path program 2 times [2022-07-11 23:18:02,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:18:02,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332751787] [2022-07-11 23:18:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:18:02,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:18:02,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:18:02,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583307190] [2022-07-11 23:18:02,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:18:02,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:02,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:18:02,500 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 23:18:02,501 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 23:18:02,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:18:02,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:18:02,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:18:02,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:18:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-11 23:18:02,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:18:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-11 23:18:02,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:18:02,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332751787] [2022-07-11 23:18:02,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:18:02,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583307190] [2022-07-11 23:18:02,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583307190] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:18:02,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:18:02,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-11 23:18:02,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368278599] [2022-07-11 23:18:02,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:18:02,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:18:02,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:18:02,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:18:02,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:18:02,695 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 23:18:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:18:02,885 INFO L93 Difference]: Finished difference Result 178 states and 211 transitions. [2022-07-11 23:18:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:18:02,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 23:18:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:18:02,888 INFO L225 Difference]: With dead ends: 178 [2022-07-11 23:18:02,888 INFO L226 Difference]: Without dead ends: 98 [2022-07-11 23:18:02,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 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 23:18:02,889 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:18:02,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 57 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:18:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-11 23:18:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2022-07-11 23:18:02,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:18:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-07-11 23:18:02,903 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 38 [2022-07-11 23:18:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:18:02,904 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-07-11 23:18:02,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 23:18:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-07-11 23:18:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-11 23:18:02,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:18:02,911 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:18:02,932 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 23:18:03,127 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 23:18:03,127 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:18:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:18:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash 658217347, now seen corresponding path program 2 times [2022-07-11 23:18:03,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:18:03,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582436183] [2022-07-11 23:18:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:18:03,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:18:03,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:18:03,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615653431] [2022-07-11 23:18:03,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:18:03,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:03,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:18:03,176 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 23:18:03,184 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 23:18:03,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:18:03,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:18:03,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:18:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:18:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-11 23:18:03,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:18:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-11 23:18:03,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:18:03,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582436183] [2022-07-11 23:18:03,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:18:03,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615653431] [2022-07-11 23:18:03,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615653431] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:18:03,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:18:03,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-11 23:18:03,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021976673] [2022-07-11 23:18:03,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:18:03,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:18:03,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:18:03,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:18:03,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:18:03,389 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 23:18:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:18:03,555 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-07-11 23:18:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:18:03,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 42 [2022-07-11 23:18:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:18:03,556 INFO L225 Difference]: With dead ends: 133 [2022-07-11 23:18:03,556 INFO L226 Difference]: Without dead ends: 70 [2022-07-11 23:18:03,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:18:03,557 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 157 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:18:03,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 56 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:18:03,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-11 23:18:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2022-07-11 23:18:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:18:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-07-11 23:18:03,563 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 42 [2022-07-11 23:18:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:18:03,564 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-07-11 23:18:03,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 23:18:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-07-11 23:18:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:18:03,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:18:03,565 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:18:03,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-11 23:18:03,777 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 23:18:03,777 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:18:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:18:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1356840755, now seen corresponding path program 3 times [2022-07-11 23:18:03,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:18:03,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309614356] [2022-07-11 23:18:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:18:03,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:18:03,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:18:03,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392513639] [2022-07-11 23:18:03,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:18:03,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:03,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:18:03,823 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 23:18:03,825 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 23:18:04,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-11 23:18:04,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:18:04,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:18:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:18:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:18:04,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:18:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:18:04,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:18:04,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309614356] [2022-07-11 23:18:04,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:18:04,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392513639] [2022-07-11 23:18:04,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392513639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:18:04,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:18:04,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-11 23:18:04,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324614265] [2022-07-11 23:18:04,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:18:04,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:18:04,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:18:04,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:18:04,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:18:04,454 INFO L87 Difference]: Start difference. First operand 50 states and 54 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 23:18:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:18:04,675 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2022-07-11 23:18:04,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 23:18:04,676 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 44 [2022-07-11 23:18:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:18:04,676 INFO L225 Difference]: With dead ends: 152 [2022-07-11 23:18:04,676 INFO L226 Difference]: Without dead ends: 122 [2022-07-11 23:18:04,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-07-11 23:18:04,677 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:18:04,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 76 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:18:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-11 23:18:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2022-07-11 23:18:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 85 states have internal predecessors, (93), 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 23:18:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-07-11 23:18:04,688 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 44 [2022-07-11 23:18:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:18:04,688 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-07-11 23:18:04,688 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 23:18:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-07-11 23:18:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 23:18:04,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:18:04,689 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:18:04,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-11 23:18:04,895 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 23:18:04,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:18:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:18:04,896 INFO L85 PathProgramCache]: Analyzing trace with hash 686844275, now seen corresponding path program 3 times [2022-07-11 23:18:04,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:18:04,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317861854] [2022-07-11 23:18:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:18:04,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:18:04,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:18:04,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459300056] [2022-07-11 23:18:04,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:18:04,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:04,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:18:04,933 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 23:18:04,934 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 23:18:05,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-11 23:18:05,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:18:05,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-11 23:18:05,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:18:05,455 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 44 treesize of output 42 [2022-07-11 23:18:05,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 23:18:05,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:05,684 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 23:18:05,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:05,777 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 23:18:05,889 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 23:18:05,987 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:18:05,988 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 23:18:05,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:05,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:05,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:05,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:05,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:18:06,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,003 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 23:18:06,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 57 [2022-07-11 23:18:06,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:06,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:18:06,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:18:06,217 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-11 23:18:06,217 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 23:18:06,418 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-11 23:18:06,419 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 23:18:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:18:06,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:18:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:18:08,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:18:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317861854] [2022-07-11 23:18:08,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:18:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459300056] [2022-07-11 23:18:08,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459300056] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:18:08,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:18:08,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2022-07-11 23:18:08,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922650525] [2022-07-11 23:18:08,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:18:08,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-11 23:18:08,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:18:08,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-11 23:18:08,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1366, Unknown=0, NotChecked=0, Total=1722 [2022-07-11 23:18:08,008 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 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 23:18:10,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:18:10,167 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2022-07-11 23:18:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-11 23:18:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 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 45 [2022-07-11 23:18:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:18:10,168 INFO L225 Difference]: With dead ends: 126 [2022-07-11 23:18:10,169 INFO L226 Difference]: Without dead ends: 124 [2022-07-11 23:18:10,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=664, Invalid=2758, Unknown=0, NotChecked=0, Total=3422 [2022-07-11 23:18:10,171 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:18:10,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 133 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 358 Invalid, 0 Unknown, 534 Unchecked, 0.4s Time] [2022-07-11 23:18:10,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-11 23:18:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2022-07-11 23:18:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1009174311926606) internal successors, (120), 109 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:18:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2022-07-11 23:18:10,184 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 45 [2022-07-11 23:18:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:18:10,184 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2022-07-11 23:18:10,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 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 23:18:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2022-07-11 23:18:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 23:18:10,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:18:10,185 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:18:10,200 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 23:18:10,391 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 23:18:10,392 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:18:10,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:18:10,392 INFO L85 PathProgramCache]: Analyzing trace with hash 132233513, now seen corresponding path program 4 times [2022-07-11 23:18:10,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:18:10,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145589583] [2022-07-11 23:18:10,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:18:10,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:18:10,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:18:10,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525356242] [2022-07-11 23:18:10,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:18:10,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:10,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:18:10,415 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 23:18:10,444 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 23:18:10,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:18:10,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:18:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-11 23:18:10,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:18:10,774 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:18:10,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 111 [2022-07-11 23:18:10,810 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 23:18:10,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:10,884 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 23:18:10,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:10,941 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 23:18:11,001 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 19 treesize of output 18 [2022-07-11 23:18:11,085 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:18:11,085 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 2 case distinctions, treesize of input 139 treesize of output 127 [2022-07-11 23:18:11,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:18:11,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,096 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 23:18:11,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-11 23:18:11,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,214 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:18:11,214 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 2 case distinctions, treesize of input 47 treesize of output 44 [2022-07-11 23:18:11,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,342 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-07-11 23:18:11,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 52 [2022-07-11 23:18:11,420 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:18:11,421 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 23:18:11,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:18:11,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,485 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 23:18:11,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:11,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:18:11,618 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-11 23:18:11,618 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 66 treesize of output 56 [2022-07-11 23:18:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:18:11,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:18:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:18:42,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:18:42,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145589583] [2022-07-11 23:18:42,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:18:42,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525356242] [2022-07-11 23:18:42,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525356242] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:18:42,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:18:42,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2022-07-11 23:18:42,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248306494] [2022-07-11 23:18:42,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:18:42,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-11 23:18:42,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:18:42,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-11 23:18:42,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1608, Unknown=1, NotChecked=0, Total=1806 [2022-07-11 23:18:42,486 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 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 23:18:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:18:50,078 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2022-07-11 23:18:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-11 23:18:50,079 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 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 49 [2022-07-11 23:18:50,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:18:50,079 INFO L225 Difference]: With dead ends: 170 [2022-07-11 23:18:50,079 INFO L226 Difference]: Without dead ends: 114 [2022-07-11 23:18:50,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=317, Invalid=2544, Unknown=1, NotChecked=0, Total=2862 [2022-07-11 23:18:50,081 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:18:50,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 148 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 347 Invalid, 0 Unknown, 212 Unchecked, 0.8s Time] [2022-07-11 23:18:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-11 23:18:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2022-07-11 23:18:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0982142857142858) internal successors, (123), 112 states have internal predecessors, (123), 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 23:18:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2022-07-11 23:18:50,093 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 49 [2022-07-11 23:18:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:18:50,093 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2022-07-11 23:18:50,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 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 23:18:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2022-07-11 23:18:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 23:18:50,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:18:50,094 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:18:50,115 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 23:18:50,307 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 23:18:50,307 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:18:50,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:18:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1152617206, now seen corresponding path program 4 times [2022-07-11 23:18:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:18:50,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001223902] [2022-07-11 23:18:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:18:50,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:18:50,330 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:18:50,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165316919] [2022-07-11 23:18:50,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:18:50,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:18:50,332 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 23:18:50,360 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 23:18:51,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:18:51,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:18:51,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-11 23:18:51,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:18:51,075 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 44 treesize of output 42 [2022-07-11 23:18:51,202 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 23:18:51,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,262 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 23:18:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,308 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 23:18:51,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,347 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 23:18:51,399 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 23:18:51,477 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:18:51,478 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 23:18:51,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:18:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,489 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 23:18:51,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,524 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 23:18:51,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:18:51,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:18:51,638 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-11 23:18:51,638 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 65 treesize of output 73 [2022-07-11 23:18:51,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:51,694 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:18:51,694 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 41 treesize of output 42 [2022-07-11 23:18:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:18:51,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:18:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:18:52,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:18:52,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001223902] [2022-07-11 23:18:52,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:18:52,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165316919] [2022-07-11 23:18:52,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165316919] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:18:52,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:18:52,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 28 [2022-07-11 23:18:52,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497325673] [2022-07-11 23:18:52,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:18:52,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-11 23:18:52,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:18:52,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-11 23:18:52,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-07-11 23:18:52,717 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 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 23:18:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:18:53,186 INFO L93 Difference]: Finished difference Result 145 states and 159 transitions. [2022-07-11 23:18:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-11 23:18:53,188 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 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 50 [2022-07-11 23:18:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:18:53,189 INFO L225 Difference]: With dead ends: 145 [2022-07-11 23:18:53,189 INFO L226 Difference]: Without dead ends: 143 [2022-07-11 23:18:53,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 23:18:53,190 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:18:53,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 116 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 219 Invalid, 0 Unknown, 206 Unchecked, 0.2s Time] [2022-07-11 23:18:53,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-11 23:18:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2022-07-11 23:18:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 135 states have internal predecessors, (150), 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 23:18:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2022-07-11 23:18:53,208 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 50 [2022-07-11 23:18:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:18:53,208 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2022-07-11 23:18:53,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 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 23:18:53,208 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2022-07-11 23:18:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-11 23:18:53,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:18:53,209 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:18:53,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 23:18:53,422 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 23:18:53,422 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:18:53,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:18:53,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1349508800, now seen corresponding path program 5 times [2022-07-11 23:18:53,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:18:53,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867066589] [2022-07-11 23:18:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:18:53,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:18:53,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:18:53,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767479096] [2022-07-11 23:18:53,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:18:53,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:53,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:18:53,460 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 23:18:53,461 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 23:18:56,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-11 23:18:56,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:18:56,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-11 23:18:56,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:18:56,819 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 44 treesize of output 42 [2022-07-11 23:18:56,918 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 23:18:56,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:56,969 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 23:18:57,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,014 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 23:18:57,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,051 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 23:18:57,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-11 23:18:57,155 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:18:57,155 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 23:18:57,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:18:57,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,163 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 23:18:57,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,290 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:18:57,290 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 51 treesize of output 48 [2022-07-11 23:18:57,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:18:57,359 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:18:57,359 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 23:18:57,492 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-11 23:18:57,492 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 23:18:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:18:57,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:18:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 39 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:18:59,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:18:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867066589] [2022-07-11 23:18:59,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:18:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767479096] [2022-07-11 23:18:59,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767479096] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:18:59,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:18:59,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2022-07-11 23:18:59,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921883909] [2022-07-11 23:18:59,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:18:59,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-11 23:18:59,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:18:59,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-11 23:18:59,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2022-07-11 23:18:59,965 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 36 states have internal predecessors, (93), 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 23:19:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:19:00,875 INFO L93 Difference]: Finished difference Result 183 states and 201 transitions. [2022-07-11 23:19:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-11 23:19:00,876 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 36 states have internal predecessors, (93), 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 54 [2022-07-11 23:19:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:19:00,877 INFO L225 Difference]: With dead ends: 183 [2022-07-11 23:19:00,877 INFO L226 Difference]: Without dead ends: 181 [2022-07-11 23:19:00,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2022-07-11 23:19:00,878 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:19:00,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 93 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 132 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-07-11 23:19:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-11 23:19:00,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 147. [2022-07-11 23:19:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1164383561643836) internal successors, (163), 146 states have internal predecessors, (163), 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 23:19:00,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2022-07-11 23:19:00,900 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 54 [2022-07-11 23:19:00,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:19:00,900 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2022-07-11 23:19:00,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 36 states have internal predecessors, (93), 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 23:19:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2022-07-11 23:19:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 23:19:00,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:19:00,901 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:19:00,912 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 23:19:01,110 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 23:19:01,110 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:19:01,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:19:01,111 INFO L85 PathProgramCache]: Analyzing trace with hash -615668980, now seen corresponding path program 6 times [2022-07-11 23:19:01,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:19:01,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559497915] [2022-07-11 23:19:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:01,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:19:01,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:19:01,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815851723] [2022-07-11 23:19:01,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:19:01,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:19:01,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:19:01,149 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 23:19:01,181 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 23:19:02,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-11 23:19:02,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:19:02,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:19:02,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:19:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:19:02,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:19:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:19:02,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:19:02,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559497915] [2022-07-11 23:19:02,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:19:02,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815851723] [2022-07-11 23:19:02,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815851723] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:19:02,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:19:02,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-11 23:19:02,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774918160] [2022-07-11 23:19:02,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:19:02,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:19:02,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:19:02,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:19:02,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:19:02,459 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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 23:19:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:19:02,745 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2022-07-11 23:19:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:19:02,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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 55 [2022-07-11 23:19:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:19:02,746 INFO L225 Difference]: With dead ends: 177 [2022-07-11 23:19:02,746 INFO L226 Difference]: Without dead ends: 146 [2022-07-11 23:19:02,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:19:02,749 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 246 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:19:02,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 67 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:19:02,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-11 23:19:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2022-07-11 23:19:02,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 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 23:19:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2022-07-11 23:19:02,761 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 55 [2022-07-11 23:19:02,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:19:02,762 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2022-07-11 23:19:02,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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 23:19:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2022-07-11 23:19:02,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-11 23:19:02,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:19:02,763 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:19:02,772 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 23:19:02,971 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 23:19:02,971 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:19:02,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:19:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash 631323149, now seen corresponding path program 5 times [2022-07-11 23:19:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:19:02,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221142070] [2022-07-11 23:19:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:02,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:19:03,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:19:03,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251728730] [2022-07-11 23:19:03,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:19:03,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:19:03,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:19:03,011 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 23:19:03,045 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 23:19:22,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-11 23:19:22,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:19:23,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 23:19:23,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:19:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-11 23:19:23,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:19:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-11 23:19:23,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:19:23,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221142070] [2022-07-11 23:19:23,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:19:23,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251728730] [2022-07-11 23:19:23,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251728730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:19:23,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:19:23,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-07-11 23:19:23,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665397705] [2022-07-11 23:19:23,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:19:23,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-11 23:19:23,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:19:23,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-11 23:19:23,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-11 23:19:23,252 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:23,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:19:23,606 INFO L93 Difference]: Finished difference Result 235 states and 253 transitions. [2022-07-11 23:19:23,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:19:23,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-11 23:19:23,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:19:23,607 INFO L225 Difference]: With dead ends: 235 [2022-07-11 23:19:23,607 INFO L226 Difference]: Without dead ends: 174 [2022-07-11 23:19:23,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:19:23,608 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 281 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:19:23,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 111 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:19:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-11 23:19:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 132. [2022-07-11 23:19:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0916030534351144) internal successors, (143), 131 states have internal predecessors, (143), 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 23:19:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 143 transitions. [2022-07-11 23:19:23,626 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 143 transitions. Word has length 56 [2022-07-11 23:19:23,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:19:23,626 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 143 transitions. [2022-07-11 23:19:23,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:19:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 143 transitions. [2022-07-11 23:19:23,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:19:23,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:19:23,627 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 23:19:23,637 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 23:19:23,831 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 23:19:23,831 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:19:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:19:23,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1159119478, now seen corresponding path program 7 times [2022-07-11 23:19:23,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:19:23,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159048132] [2022-07-11 23:19:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:19:23,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:19:23,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:19:23,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277004558] [2022-07-11 23:19:23,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:19:23,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:19:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:19:23,868 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 23:19:23,883 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 23:19:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:19:24,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-11 23:19:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:19:24,585 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:19:24,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 50 [2022-07-11 23:19:24,616 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 23:19:24,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:24,676 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 23:19:24,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:24,730 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 23:19:24,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:24,779 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 23:19:24,839 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 19 treesize of output 18 [2022-07-11 23:19:24,927 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:19:24,927 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 2 case distinctions, treesize of input 139 treesize of output 127 [2022-07-11 23:19:24,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:19:24,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:24,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:24,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:24,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:24,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:24,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:24,938 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 23:19:25,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,060 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:19:25,061 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 2 case distinctions, treesize of input 51 treesize of output 48 [2022-07-11 23:19:25,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,157 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:19:25,157 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 2 case distinctions, treesize of input 47 treesize of output 44 [2022-07-11 23:19:25,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,262 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-07-11 23:19:25,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 48 [2022-07-11 23:19:25,354 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:19:25,354 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 23:19:25,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:19:25,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,363 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 23:19:25,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,383 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 200 treesize of output 113 [2022-07-11 23:19:25,520 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:19:25,520 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 193 treesize of output 173 [2022-07-11 23:19:25,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 235 [2022-07-11 23:19:25,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 139 [2022-07-11 23:19:25,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:19:25,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:19:25,699 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-11 23:19:25,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 74 [2022-07-11 23:19:25,999 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-11 23:19:25,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 46 [2022-07-11 23:19:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:19:26,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:19:47,999 WARN L233 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 124 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)