./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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-programs/partial_mod_count_limited_3.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 e98c2efe8dc7dfa25efbae5d9b3e7693444730d8a672856a92fef54f1a5fbcae --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:19:06,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:19:06,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:19:06,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:19:06,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:19:06,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:19:06,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:19:06,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:19:06,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:19:06,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:19:06,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:19:06,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:19:06,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:19:06,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:19:06,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:19:06,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:19:06,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:19:06,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:19:06,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:19:06,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:19:06,253 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:19:06,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:19:06,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:19:06,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:19:06,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:19:06,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:19:06,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:19:06,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:19:06,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:19:06,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:19:06,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:19:06,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:19:06,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:19:06,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:19:06,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:19:06,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:19:06,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:19:06,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:19:06,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:19:06,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:19:06,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:19:06,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:19:06,280 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:19:06,293 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:19:06,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:19:06,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:19:06,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:19:06,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:19:06,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:19:06,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:19:06,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:19:06,296 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:19:06,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:19:06,296 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:19:06,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:19:06,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:19:06,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:19:06,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:19:06,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:19:06,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:19:06,297 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:19:06,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:19:06,297 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:19:06,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:19:06,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:19:06,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:19:06,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:19:06,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:19:06,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:19:06,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:19:06,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:19:06,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:19:06,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:19:06,299 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:19:06,299 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:19:06,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:19:06,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98c2efe8dc7dfa25efbae5d9b3e7693444730d8a672856a92fef54f1a5fbcae [2022-07-13 10:19:06,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:19:06,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:19:06,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:19:06,521 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:19:06,521 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:19:06,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2022-07-13 10:19:06,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/839f8d7c3/6476ecb221f347589e7fa2ad9f60c095/FLAG2681f5526 [2022-07-13 10:19:06,936 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:19:06,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2022-07-13 10:19:06,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/839f8d7c3/6476ecb221f347589e7fa2ad9f60c095/FLAG2681f5526 [2022-07-13 10:19:07,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/839f8d7c3/6476ecb221f347589e7fa2ad9f60c095 [2022-07-13 10:19:07,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:19:07,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:19:07,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:19:07,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:19:07,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:19:07,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:19:07" (1/1) ... [2022-07-13 10:19:07,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@216df3b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07, skipping insertion in model container [2022-07-13 10:19:07,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:19:07" (1/1) ... [2022-07-13 10:19:07,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:19:07,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:19:07,499 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-programs/partial_mod_count_limited_3.c[331,344] [2022-07-13 10:19:07,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:19:07,519 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:19:07,526 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-programs/partial_mod_count_limited_3.c[331,344] [2022-07-13 10:19:07,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:19:07,541 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:19:07,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07 WrapperNode [2022-07-13 10:19:07,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:19:07,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:19:07,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:19:07,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:19:07,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07" (1/1) ... [2022-07-13 10:19:07,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07" (1/1) ... [2022-07-13 10:19:07,579 INFO L137 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-07-13 10:19:07,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:19:07,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:19:07,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:19:07,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:19:07,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07" (1/1) ... [2022-07-13 10:19:07,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07" (1/1) ... [2022-07-13 10:19:07,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07" (1/1) ... [2022-07-13 10:19:07,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07" (1/1) ... [2022-07-13 10:19:07,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07" (1/1) ... [2022-07-13 10:19:07,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07" (1/1) ... [2022-07-13 10:19:07,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07" (1/1) ... [2022-07-13 10:19:07,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:19:07,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:19:07,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:19:07,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:19:07,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07" (1/1) ... [2022-07-13 10:19:07,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:19:07,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:07,630 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) [2022-07-13 10:19:07,641 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 [2022-07-13 10:19:07,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:19:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:19:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:19:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:19:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:19:07,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:19:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:19:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:19:07,716 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:19:07,718 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:19:07,832 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:19:07,836 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:19:07,836 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 10:19:07,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:19:07 BoogieIcfgContainer [2022-07-13 10:19:07,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:19:07,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:19:07,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:19:07,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:19:07,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:19:07" (1/3) ... [2022-07-13 10:19:07,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536961fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:19:07, skipping insertion in model container [2022-07-13 10:19:07,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:19:07" (2/3) ... [2022-07-13 10:19:07,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536961fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:19:07, skipping insertion in model container [2022-07-13 10:19:07,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:19:07" (3/3) ... [2022-07-13 10:19:07,847 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_3.c [2022-07-13 10:19:07,858 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:19:07,858 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:19:07,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:19:07,901 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@4f2abeac, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@31520f42 [2022-07-13 10:19:07,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:19:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 10:19:07,909 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:19:07,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:19:07,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:19:07,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:19:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2022-07-13 10:19:07,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:19:07,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689223697] [2022-07-13 10:19:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:07,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:19:07,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:19:07,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376375293] [2022-07-13 10:19:07,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:07,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:07,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:07,988 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) [2022-07-13 10:19:07,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:19:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:19:08,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-13 10:19:08,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:19:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:19:08,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:19:08,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:19:08,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689223697] [2022-07-13 10:19:08,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:19:08,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376375293] [2022-07-13 10:19:08,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376375293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:19:08,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:19:08,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 10:19:08,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918224421] [2022-07-13 10:19:08,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:19:08,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 10:19:08,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:19:08,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 10:19:08,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:19:08,190 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:08,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:19:08,226 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-07-13 10:19:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 10:19:08,228 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-07-13 10:19:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:19:08,233 INFO L225 Difference]: With dead ends: 41 [2022-07-13 10:19:08,233 INFO L226 Difference]: Without dead ends: 18 [2022-07-13 10:19:08,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:19:08,239 INFO L413 NwaCegarLoop]: 26 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, 26 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 [2022-07-13 10:19:08,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:19:08,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-13 10:19:08,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-13 10:19:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-07-13 10:19:08,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2022-07-13 10:19:08,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:19:08,268 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-07-13 10:19:08,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-07-13 10:19:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 10:19:08,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:19:08,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:19:08,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:19:08,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-13 10:19:08,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:19:08,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:19:08,491 INFO L85 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2022-07-13 10:19:08,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:19:08,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364107905] [2022-07-13 10:19:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:08,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:19:08,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:19:08,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167275795] [2022-07-13 10:19:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:08,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:08,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:08,514 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) [2022-07-13 10:19:08,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:19:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:19:08,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:19:08,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:19:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:19:08,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:19:08,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:19:08,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364107905] [2022-07-13 10:19:08,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:19:08,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167275795] [2022-07-13 10:19:08,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167275795] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:19:08,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:19:08,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 10:19:08,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848763004] [2022-07-13 10:19:08,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:19:08,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:19:08,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:19:08,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:19:08,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:19:08,617 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:19:08,677 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-07-13 10:19:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:19:08,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-07-13 10:19:08,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:19:08,683 INFO L225 Difference]: With dead ends: 45 [2022-07-13 10:19:08,683 INFO L226 Difference]: Without dead ends: 31 [2022-07-13 10:19:08,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:19:08,686 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:19:08,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 21 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:19:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-13 10:19:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2022-07-13 10:19:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-07-13 10:19:08,695 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-07-13 10:19:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:19:08,695 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-07-13 10:19:08,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-07-13 10:19:08,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 10:19:08,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:19:08,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:19:08,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:19:08,907 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,SelfDestructingSolverStorable1 [2022-07-13 10:19:08,907 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:19:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:19:08,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2022-07-13 10:19:08,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:19:08,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919776795] [2022-07-13 10:19:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:19:08,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:19:08,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300245484] [2022-07-13 10:19:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:08,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:08,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:08,928 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) [2022-07-13 10:19:08,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:19:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:19:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:19:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:19:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:19:09,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:19:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:19:09,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:19:09,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919776795] [2022-07-13 10:19:09,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:19:09,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300245484] [2022-07-13 10:19:09,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300245484] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:19:09,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:19:09,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-13 10:19:09,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74729997] [2022-07-13 10:19:09,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:19:09,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 10:19:09,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:19:09,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 10:19:09,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-13 10:19:09,106 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:19:09,204 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-07-13 10:19:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 10:19:09,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-13 10:19:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:19:09,207 INFO L225 Difference]: With dead ends: 73 [2022-07-13 10:19:09,208 INFO L226 Difference]: Without dead ends: 59 [2022-07-13 10:19:09,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:19:09,211 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:19:09,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 38 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:19:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-13 10:19:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2022-07-13 10:19:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 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) [2022-07-13 10:19:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-07-13 10:19:09,224 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 16 [2022-07-13 10:19:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:19:09,225 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-07-13 10:19:09,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-07-13 10:19:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 10:19:09,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:19:09,228 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:19:09,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 10:19:09,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:09,433 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:19:09,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:19:09,434 INFO L85 PathProgramCache]: Analyzing trace with hash -35725226, now seen corresponding path program 1 times [2022-07-13 10:19:09,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:19:09,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913450868] [2022-07-13 10:19:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:09,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:19:09,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:19:09,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659039043] [2022-07-13 10:19:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:09,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:09,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:09,465 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) [2022-07-13 10:19:09,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:19:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:19:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 10:19:09,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:19:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:19:09,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:19:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:19:09,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:19:09,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913450868] [2022-07-13 10:19:09,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:19:09,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659039043] [2022-07-13 10:19:09,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659039043] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:19:09,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:19:09,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-13 10:19:09,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499725516] [2022-07-13 10:19:09,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:19:09,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 10:19:09,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:19:09,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 10:19:09,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:19:09,722 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:09,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:19:09,940 INFO L93 Difference]: Finished difference Result 155 states and 195 transitions. [2022-07-13 10:19:09,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 10:19:09,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-13 10:19:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:19:09,946 INFO L225 Difference]: With dead ends: 155 [2022-07-13 10:19:09,947 INFO L226 Difference]: Without dead ends: 137 [2022-07-13 10:19:09,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:19:09,950 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 335 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:19:09,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 87 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:19:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-13 10:19:09,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 64. [2022-07-13 10:19:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:09,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-07-13 10:19:09,961 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 31 [2022-07-13 10:19:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:19:09,961 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-07-13 10:19:09,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-07-13 10:19:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 10:19:09,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:19:09,963 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:19:09,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:19:10,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:10,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:19:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:19:10,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1147663820, now seen corresponding path program 2 times [2022-07-13 10:19:10,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:19:10,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186042904] [2022-07-13 10:19:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:10,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:19:10,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:19:10,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640686927] [2022-07-13 10:19:10,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:19:10,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:10,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:10,186 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) [2022-07-13 10:19:10,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:19:10,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-13 10:19:10,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:19:10,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 10:19:10,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:19:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-13 10:19:10,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:19:10,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:19:10,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186042904] [2022-07-13 10:19:10,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:19:10,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640686927] [2022-07-13 10:19:10,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640686927] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:19:10,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:19:10,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:19:10,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076707897] [2022-07-13 10:19:10,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:19:10,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 10:19:10,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:19:10,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 10:19:10,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:19:10,496 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:10,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:19:10,540 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-07-13 10:19:10,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 10:19:10,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-13 10:19:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:19:10,542 INFO L225 Difference]: With dead ends: 76 [2022-07-13 10:19:10,542 INFO L226 Difference]: Without dead ends: 74 [2022-07-13 10:19:10,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:19:10,543 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:19:10,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 32 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:19:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-13 10:19:10,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2022-07-13 10:19:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2022-07-13 10:19:10,564 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 61 [2022-07-13 10:19:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:19:10,565 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2022-07-13 10:19:10,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2022-07-13 10:19:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 10:19:10,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:19:10,568 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:19:10,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:19:10,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:10,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:19:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:19:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1147723402, now seen corresponding path program 1 times [2022-07-13 10:19:10,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:19:10,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329068344] [2022-07-13 10:19:10,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:10,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:19:10,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:19:10,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767637255] [2022-07-13 10:19:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:10,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:10,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:10,784 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) [2022-07-13 10:19:10,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:19:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:19:10,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 10:19:10,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:19:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:19:11,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:19:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:19:11,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:19:11,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329068344] [2022-07-13 10:19:11,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:19:11,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767637255] [2022-07-13 10:19:11,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767637255] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:19:11,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:19:11,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-07-13 10:19:11,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137961164] [2022-07-13 10:19:11,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:19:11,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 10:19:11,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:19:11,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 10:19:11,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-07-13 10:19:11,239 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:19:11,694 INFO L93 Difference]: Finished difference Result 463 states and 570 transitions. [2022-07-13 10:19:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 10:19:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 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 61 [2022-07-13 10:19:11,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:19:11,696 INFO L225 Difference]: With dead ends: 463 [2022-07-13 10:19:11,696 INFO L226 Difference]: Without dead ends: 424 [2022-07-13 10:19:11,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 10:19:11,697 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 822 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:19:11,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 184 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:19:11,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-07-13 10:19:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 130. [2022-07-13 10:19:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.2868217054263567) internal successors, (166), 129 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 166 transitions. [2022-07-13 10:19:11,706 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 166 transitions. Word has length 61 [2022-07-13 10:19:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:19:11,706 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 166 transitions. [2022-07-13 10:19:11,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 166 transitions. [2022-07-13 10:19:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-13 10:19:11,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:19:11,708 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:19:11,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:19:11,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:11,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:19:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:19:11,924 INFO L85 PathProgramCache]: Analyzing trace with hash 4942966, now seen corresponding path program 2 times [2022-07-13 10:19:11,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:19:11,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597515100] [2022-07-13 10:19:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:11,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:19:11,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:19:11,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041885248] [2022-07-13 10:19:11,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:19:11,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:11,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:11,944 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) [2022-07-13 10:19:11,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:19:12,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-13 10:19:12,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:19:12,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 10:19:12,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:19:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2022-07-13 10:19:12,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:19:12,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:19:12,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597515100] [2022-07-13 10:19:12,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:19:12,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041885248] [2022-07-13 10:19:12,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041885248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:19:12,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:19:12,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 10:19:12,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373695907] [2022-07-13 10:19:12,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:19:12,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 10:19:12,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:19:12,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 10:19:12,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 10:19:12,396 INFO L87 Difference]: Start difference. First operand 130 states and 166 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:19:12,513 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2022-07-13 10:19:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 10:19:12,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-07-13 10:19:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:19:12,514 INFO L225 Difference]: With dead ends: 143 [2022-07-13 10:19:12,514 INFO L226 Difference]: Without dead ends: 141 [2022-07-13 10:19:12,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:19:12,515 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:19:12,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:19:12,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-13 10:19:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2022-07-13 10:19:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2814814814814814) internal successors, (173), 135 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 173 transitions. [2022-07-13 10:19:12,521 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 173 transitions. Word has length 121 [2022-07-13 10:19:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:19:12,522 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 173 transitions. [2022-07-13 10:19:12,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 173 transitions. [2022-07-13 10:19:12,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-13 10:19:12,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:19:12,523 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:19:12,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 10:19:12,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:12,740 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:19:12,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:19:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1531894057, now seen corresponding path program 1 times [2022-07-13 10:19:12,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:19:12,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132593861] [2022-07-13 10:19:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:12,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:19:12,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:19:12,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009564565] [2022-07-13 10:19:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:12,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:12,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:12,757 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) [2022-07-13 10:19:12,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:19:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:19:12,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 10:19:12,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:19:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 10:19:13,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:19:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 10:19:14,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:19:14,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132593861] [2022-07-13 10:19:14,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:19:14,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009564565] [2022-07-13 10:19:14,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009564565] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:19:14,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:19:14,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-07-13 10:19:14,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330202619] [2022-07-13 10:19:14,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:19:14,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-13 10:19:14,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:19:14,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-13 10:19:14,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-07-13 10:19:14,047 INFO L87 Difference]: Start difference. First operand 136 states and 173 transitions. Second operand has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:15,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:19:15,693 INFO L93 Difference]: Finished difference Result 1222 states and 1488 transitions. [2022-07-13 10:19:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-13 10:19:15,694 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 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 127 [2022-07-13 10:19:15,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:19:15,697 INFO L225 Difference]: With dead ends: 1222 [2022-07-13 10:19:15,697 INFO L226 Difference]: Without dead ends: 1147 [2022-07-13 10:19:15,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-07-13 10:19:15,699 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2256 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2256 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 10:19:15,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2256 Valid, 377 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 10:19:15,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-07-13 10:19:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 256. [2022-07-13 10:19:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.2901960784313726) internal successors, (329), 255 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 329 transitions. [2022-07-13 10:19:15,715 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 329 transitions. Word has length 127 [2022-07-13 10:19:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:19:15,716 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 329 transitions. [2022-07-13 10:19:15,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 329 transitions. [2022-07-13 10:19:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-07-13 10:19:15,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:19:15,719 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:19:15,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:19:15,936 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,SelfDestructingSolverStorable7 [2022-07-13 10:19:15,936 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:19:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:19:15,937 INFO L85 PathProgramCache]: Analyzing trace with hash -456351959, now seen corresponding path program 2 times [2022-07-13 10:19:15,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:19:15,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040167367] [2022-07-13 10:19:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:15,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:19:15,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:19:15,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878243258] [2022-07-13 10:19:15,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:19:15,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:15,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:15,970 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) [2022-07-13 10:19:15,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:19:16,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:19:16,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:19:16,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-13 10:19:16,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:19:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 10:19:17,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:19:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 10:19:20,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:19:20,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040167367] [2022-07-13 10:19:20,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:19:20,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878243258] [2022-07-13 10:19:20,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878243258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:19:20,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:19:20,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2022-07-13 10:19:20,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269993339] [2022-07-13 10:19:20,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:19:20,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-13 10:19:20,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:19:20,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-13 10:19:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-07-13 10:19:20,391 INFO L87 Difference]: Start difference. First operand 256 states and 329 transitions. Second operand has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:29,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:19:29,295 INFO L93 Difference]: Finished difference Result 2482 states and 3024 transitions. [2022-07-13 10:19:29,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-13 10:19:29,297 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 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 247 [2022-07-13 10:19:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:19:29,303 INFO L225 Difference]: With dead ends: 2482 [2022-07-13 10:19:29,303 INFO L226 Difference]: Without dead ends: 2347 [2022-07-13 10:19:29,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-07-13 10:19:29,308 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6152 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6152 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:19:29,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6152 Valid, 759 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 10:19:29,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2022-07-13 10:19:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 496. [2022-07-13 10:19:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 1.2949494949494949) internal successors, (641), 495 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 641 transitions. [2022-07-13 10:19:29,330 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 641 transitions. Word has length 247 [2022-07-13 10:19:29,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:19:29,330 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 641 transitions. [2022-07-13 10:19:29,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.887755102040816) internal successors, (479), 97 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:29,331 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 641 transitions. [2022-07-13 10:19:29,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-07-13 10:19:29,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:19:29,336 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:19:29,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-13 10:19:29,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:29,550 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:19:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:19:29,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1703865129, now seen corresponding path program 3 times [2022-07-13 10:19:29,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:19:29,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527835417] [2022-07-13 10:19:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:29,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:19:29,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:19:29,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579774741] [2022-07-13 10:19:29,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:19:29,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:29,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:29,608 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) [2022-07-13 10:19:29,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:19:29,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 10:19:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:19:29,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 10:19:29,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:19:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21953 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2022-07-13 10:19:31,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:19:35,528 WARN L833 $PredicateComparison]: unable to prove that (< 2 (mod (+ 2 (div (mod c_~N~0 4294967296) 6)) 4294967296)) is different from false [2022-07-13 10:19:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21953 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2022-07-13 10:19:35,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:19:35,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527835417] [2022-07-13 10:19:35,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:19:35,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579774741] [2022-07-13 10:19:35,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579774741] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:19:35,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:19:35,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-13 10:19:35,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067081708] [2022-07-13 10:19:35,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:19:35,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 10:19:35,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:19:35,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 10:19:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=62, Unknown=1, NotChecked=16, Total=110 [2022-07-13 10:19:35,550 INFO L87 Difference]: Start difference. First operand 496 states and 641 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2022-07-13 10:19:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:19:36,010 INFO L93 Difference]: Finished difference Result 527 states and 680 transitions. [2022-07-13 10:19:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 10:19:36,012 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 487 [2022-07-13 10:19:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:19:36,013 INFO L225 Difference]: With dead ends: 527 [2022-07-13 10:19:36,013 INFO L226 Difference]: Without dead ends: 525 [2022-07-13 10:19:36,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 962 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=95, Invalid=180, Unknown=1, NotChecked=30, Total=306 [2022-07-13 10:19:36,014 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 166 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:19:36,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 84 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 89 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-07-13 10:19:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-07-13 10:19:36,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 520. [2022-07-13 10:19:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.2890173410404624) internal successors, (669), 519 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:36,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 669 transitions. [2022-07-13 10:19:36,036 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 669 transitions. Word has length 487 [2022-07-13 10:19:36,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:19:36,036 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 669 transitions. [2022-07-13 10:19:36,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2022-07-13 10:19:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 669 transitions. [2022-07-13 10:19:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-07-13 10:19:36,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:19:36,039 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:19:36,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:19:36,243 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,SelfDestructingSolverStorable9 [2022-07-13 10:19:36,243 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:19:36,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:19:36,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1887291253, now seen corresponding path program 4 times [2022-07-13 10:19:36,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:19:36,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958032030] [2022-07-13 10:19:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:36,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:19:36,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:19:36,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896456757] [2022-07-13 10:19:36,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:19:36,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:36,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:36,290 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) [2022-07-13 10:19:36,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:19:36,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:19:36,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:19:36,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 10:19:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:19:36,630 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 17 treesize of output 13 [2022-07-13 10:19:36,647 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 19 treesize of output 7 [2022-07-13 10:19:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 831 proven. 4 refuted. 0 times theorem prover too weak. 21194 trivial. 0 not checked. [2022-07-13 10:19:36,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:19:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 831 proven. 4 refuted. 0 times theorem prover too weak. 21194 trivial. 0 not checked. [2022-07-13 10:19:36,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:19:36,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958032030] [2022-07-13 10:19:36,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:19:36,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896456757] [2022-07-13 10:19:36,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896456757] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:19:36,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:19:36,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-13 10:19:36,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104935064] [2022-07-13 10:19:36,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:19:36,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 10:19:36,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:19:36,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 10:19:36,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:19:36,714 INFO L87 Difference]: Start difference. First operand 520 states and 669 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:36,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:19:36,956 INFO L93 Difference]: Finished difference Result 1108 states and 1415 transitions. [2022-07-13 10:19:36,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 10:19:36,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 511 [2022-07-13 10:19:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:19:36,960 INFO L225 Difference]: With dead ends: 1108 [2022-07-13 10:19:36,960 INFO L226 Difference]: Without dead ends: 596 [2022-07-13 10:19:36,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 1012 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:19:36,961 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:19:36,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 84 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:19:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-07-13 10:19:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 520. [2022-07-13 10:19:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.28131021194605) internal successors, (665), 519 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:36,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 665 transitions. [2022-07-13 10:19:36,990 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 665 transitions. Word has length 511 [2022-07-13 10:19:36,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:19:36,991 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 665 transitions. [2022-07-13 10:19:36,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:19:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 665 transitions. [2022-07-13 10:19:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-07-13 10:19:36,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:19:36,994 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 90, 47, 47, 6, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:19:37,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 10:19:37,213 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,SelfDestructingSolverStorable10 [2022-07-13 10:19:37,214 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:19:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:19:37,214 INFO L85 PathProgramCache]: Analyzing trace with hash 593762805, now seen corresponding path program 1 times [2022-07-13 10:19:37,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:19:37,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057699929] [2022-07-13 10:19:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:37,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:19:37,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 10:19:37,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900359439] [2022-07-13 10:19:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:19:37,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:19:37,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:19:37,272 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) [2022-07-13 10:19:37,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:19:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:19:37,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1685 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-13 10:19:37,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:19:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-13 10:19:42,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:20:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22029 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-13 10:20:20,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:20:20,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057699929] [2022-07-13 10:20:20,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 10:20:20,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900359439] [2022-07-13 10:20:20,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900359439] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:20:20,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:20:20,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2022-07-13 10:20:20,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108191] [2022-07-13 10:20:20,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:20:20,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-07-13 10:20:20,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:20:20,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-07-13 10:20:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-07-13 10:20:20,648 INFO L87 Difference]: Start difference. First operand 520 states and 665 transitions. Second operand has 194 states, 194 states have (on average 4.943298969072165) internal successors, (959), 193 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)