./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/nla-digbench-scaling/ps4-ll_valuebound50.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 dcebefc76bde79b9a5fa67feebc75881761b0a4209b78516b385f787f62f9340 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 07:51:47,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 07:51:47,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 07:51:47,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 07:51:47,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 07:51:47,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 07:51:47,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 07:51:47,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 07:51:47,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 07:51:47,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 07:51:47,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 07:51:47,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 07:51:47,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 07:51:47,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 07:51:47,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 07:51:47,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 07:51:47,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 07:51:47,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 07:51:47,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 07:51:47,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 07:51:47,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 07:51:47,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 07:51:47,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 07:51:47,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 07:51:47,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 07:51:47,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 07:51:47,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 07:51:47,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 07:51:47,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 07:51:47,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 07:51:47,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 07:51:47,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 07:51:47,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 07:51:47,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 07:51:47,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 07:51:47,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 07:51:47,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 07:51:47,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 07:51:47,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 07:51:47,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 07:51:47,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 07:51:47,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 07:51:47,709 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 07:51:47,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 07:51:47,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 07:51:47,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 07:51:47,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 07:51:47,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 07:51:47,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 07:51:47,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 07:51:47,712 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 07:51:47,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 07:51:47,713 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 07:51:47,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 07:51:47,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 07:51:47,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 07:51:47,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 07:51:47,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 07:51:47,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 07:51:47,714 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 07:51:47,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 07:51:47,714 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 07:51:47,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 07:51:47,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 07:51:47,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 07:51:47,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 07:51:47,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:51:47,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 07:51:47,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 07:51:47,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 07:51:47,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 07:51:47,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 07:51:47,716 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 07:51:47,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 07:51:47,716 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 07:51:47,716 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 07:51:47,717 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 07:51:47,717 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dcebefc76bde79b9a5fa67feebc75881761b0a4209b78516b385f787f62f9340 [2023-02-17 07:51:47,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 07:51:47,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 07:51:47,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 07:51:47,909 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 07:51:47,909 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 07:51:47,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c [2023-02-17 07:51:48,970 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 07:51:49,069 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 07:51:49,069 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c [2023-02-17 07:51:49,073 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9822be989/45f4cc64349942938cfc07ae3665630e/FLAGc8f6cab07 [2023-02-17 07:51:49,085 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9822be989/45f4cc64349942938cfc07ae3665630e [2023-02-17 07:51:49,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 07:51:49,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 07:51:49,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 07:51:49,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 07:51:49,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 07:51:49,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f48f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49, skipping insertion in model container [2023-02-17 07:51:49,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 07:51:49,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 07:51:49,183 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c[458,471] [2023-02-17 07:51:49,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:51:49,197 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 07:51:49,204 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c[458,471] [2023-02-17 07:51:49,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:51:49,215 INFO L208 MainTranslator]: Completed translation [2023-02-17 07:51:49,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49 WrapperNode [2023-02-17 07:51:49,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 07:51:49,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 07:51:49,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 07:51:49,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 07:51:49,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,233 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2023-02-17 07:51:49,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 07:51:49,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 07:51:49,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 07:51:49,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 07:51:49,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 07:51:49,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 07:51:49,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 07:51:49,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 07:51:49,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49" (1/1) ... [2023-02-17 07:51:49,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:51:49,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:51:49,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 07:51:49,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 07:51:49,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 07:51:49,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 07:51:49,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 07:51:49,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 07:51:49,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 07:51:49,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 07:51:49,379 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 07:51:49,381 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 07:51:49,512 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 07:51:49,516 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 07:51:49,518 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 07:51:49,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:51:49 BoogieIcfgContainer [2023-02-17 07:51:49,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 07:51:49,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 07:51:49,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 07:51:49,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 07:51:49,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:51:49" (1/3) ... [2023-02-17 07:51:49,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b48f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:51:49, skipping insertion in model container [2023-02-17 07:51:49,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:51:49" (2/3) ... [2023-02-17 07:51:49,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b48f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:51:49, skipping insertion in model container [2023-02-17 07:51:49,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:51:49" (3/3) ... [2023-02-17 07:51:49,527 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound50.c [2023-02-17 07:51:49,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 07:51:49,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 07:51:49,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 07:51:49,591 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@662681f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 07:51:49,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 07:51:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:51:49,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 07:51:49,601 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:51:49,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:51:49,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:51:49,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:51:49,608 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2023-02-17 07:51:49,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:51:49,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309674484] [2023-02-17 07:51:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:51:49,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:51:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:51:49,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:51:49,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309674484] [2023-02-17 07:51:49,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 07:51:49,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991281548] [2023-02-17 07:51:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:51:49,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:51:49,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:51:49,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:51:49,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 07:51:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:51:49,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 07:51:49,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:51:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:51:49,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:51:49,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991281548] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:51:49,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:51:49,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 07:51:49,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008955204] [2023-02-17 07:51:49,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:51:49,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 07:51:49,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:51:49,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 07:51:49,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:51:49,786 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:51:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:51:49,799 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2023-02-17 07:51:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 07:51:49,800 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 07:51:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:51:49,805 INFO L225 Difference]: With dead ends: 35 [2023-02-17 07:51:49,805 INFO L226 Difference]: Without dead ends: 15 [2023-02-17 07:51:49,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:51:49,809 INFO L413 NwaCegarLoop]: 21 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, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:51:49,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:51:49,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-17 07:51:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-17 07:51:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:51:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-17 07:51:49,838 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2023-02-17 07:51:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:51:49,839 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-17 07:51:49,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:51:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-17 07:51:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 07:51:49,852 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:51:49,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:51:49,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 07:51:50,057 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 [2023-02-17 07:51:50,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:51:50,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:51:50,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2023-02-17 07:51:50,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:51:50,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445632562] [2023-02-17 07:51:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:51:50,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:51:50,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:51:50,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051049475] [2023-02-17 07:51:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:51:50,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:51:50,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:51:50,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:51:50,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 07:51:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:51:50,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 07:51:50,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:51:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:51:50,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:51:50,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:51:50,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445632562] [2023-02-17 07:51:50,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:51:50,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051049475] [2023-02-17 07:51:50,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051049475] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:51:50,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:51:50,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 07:51:50,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306610719] [2023-02-17 07:51:50,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:51:50,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:51:50,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:51:50,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:51:50,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 07:51:50,134 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:51:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:51:50,179 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-02-17 07:51:50,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 07:51:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 07:51:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:51:50,182 INFO L225 Difference]: With dead ends: 26 [2023-02-17 07:51:50,182 INFO L226 Difference]: Without dead ends: 22 [2023-02-17 07:51:50,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 07:51:50,183 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:51:50,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:51:50,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-17 07:51:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-17 07:51:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:51:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-17 07:51:50,189 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2023-02-17 07:51:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:51:50,189 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-17 07:51:50,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:51:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-17 07:51:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 07:51:50,190 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:51:50,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:51:50,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 07:51:50,396 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 [2023-02-17 07:51:50,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:51:50,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:51:50,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2023-02-17 07:51:50,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:51:50,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330270980] [2023-02-17 07:51:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:51:50,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:51:50,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:51:50,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221718062] [2023-02-17 07:51:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:51:50,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:51:50,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:51:50,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:51:50,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 07:51:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:51:50,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 07:51:50,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:51:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:51:50,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:51:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:51:50,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:51:50,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330270980] [2023-02-17 07:51:50,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:51:50,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221718062] [2023-02-17 07:51:50,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221718062] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:51:50,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:51:50,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-17 07:51:50,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965811662] [2023-02-17 07:51:50,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:51:50,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 07:51:50,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:51:50,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 07:51:50,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-17 07:51:50,897 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:51:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:51:51,001 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-02-17 07:51:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 07:51:51,002 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-17 07:51:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:51:51,003 INFO L225 Difference]: With dead ends: 33 [2023-02-17 07:51:51,003 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 07:51:51,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-17 07:51:51,004 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:51:51,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 39 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:51:51,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 07:51:51,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-02-17 07:51:51,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:51:51,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-02-17 07:51:51,010 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2023-02-17 07:51:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:51:51,010 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-02-17 07:51:51,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:51:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-02-17 07:51:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 07:51:51,011 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:51:51,011 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:51:51,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 07:51:51,215 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 [2023-02-17 07:51:51,218 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:51:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:51:51,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1711372296, now seen corresponding path program 1 times [2023-02-17 07:51:51,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:51:51,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999339863] [2023-02-17 07:51:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:51:51,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:51:51,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:51:51,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327935979] [2023-02-17 07:51:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:51:51,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:51:51,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:51:51,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:51:51,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 07:51:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:51:51,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 07:51:51,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:51:53,412 WARN L859 $PredicateComparison]: unable to prove that (and (= (+ |c_ULTIMATE.start_main_~y~0#1| (- 1)) 0) (<= (+ (div (+ (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (* (- 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (- 4)) (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 0) (< 0 |c_ULTIMATE.start_main_~k~0#1|) (<= |c_ULTIMATE.start_main_~k~0#1| 1) (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) is different from true [2023-02-17 07:51:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 07:51:53,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:52:05,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:52:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999339863] [2023-02-17 07:52:05,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:52:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327935979] [2023-02-17 07:52:05,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327935979] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:52:05,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:52:05,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-17 07:52:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562868405] [2023-02-17 07:52:05,177 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:52:05,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 07:52:05,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:52:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 07:52:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=166, Unknown=2, NotChecked=26, Total=240 [2023-02-17 07:52:05,179 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:52:07,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:52:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:52:07,281 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2023-02-17 07:52:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 07:52:07,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-17 07:52:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:52:07,282 INFO L225 Difference]: With dead ends: 31 [2023-02-17 07:52:07,283 INFO L226 Difference]: Without dead ends: 26 [2023-02-17 07:52:07,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=68, Invalid=240, Unknown=2, NotChecked=32, Total=342 [2023-02-17 07:52:07,284 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:52:07,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 1 Unknown, 22 Unchecked, 2.1s Time] [2023-02-17 07:52:07,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-17 07:52:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-17 07:52:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:52:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-02-17 07:52:07,292 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2023-02-17 07:52:07,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:52:07,292 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-02-17 07:52:07,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:52:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-02-17 07:52:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 07:52:07,294 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:52:07,294 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:52:07,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 07:52:07,495 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 [2023-02-17 07:52:07,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:52:07,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:52:07,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1075497887, now seen corresponding path program 2 times [2023-02-17 07:52:07,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:52:07,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197120067] [2023-02-17 07:52:07,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:52:07,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:52:07,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:52:07,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306637849] [2023-02-17 07:52:07,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:52:07,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:52:07,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:52:07,514 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:52:07,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 07:52:07,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:52:07,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:52:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-17 07:52:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:52:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 07:52:07,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:52:09,705 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-17 07:52:09,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:52:09,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197120067] [2023-02-17 07:52:09,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:52:09,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306637849] [2023-02-17 07:52:09,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306637849] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:52:09,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:52:09,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-17 07:52:09,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216008274] [2023-02-17 07:52:09,710 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:52:09,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 07:52:09,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:52:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 07:52:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-02-17 07:52:09,711 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:52:09,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:52:09,807 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2023-02-17 07:52:09,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 07:52:09,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2023-02-17 07:52:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:52:09,808 INFO L225 Difference]: With dead ends: 34 [2023-02-17 07:52:09,808 INFO L226 Difference]: Without dead ends: 29 [2023-02-17 07:52:09,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2023-02-17 07:52:09,809 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:52:09,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:52:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-17 07:52:09,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-17 07:52:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 07:52:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-02-17 07:52:09,815 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2023-02-17 07:52:09,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:52:09,815 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-02-17 07:52:09,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:52:09,816 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-02-17 07:52:09,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 07:52:09,816 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:52:09,816 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:52:09,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-17 07:52:10,021 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 [2023-02-17 07:52:10,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:52:10,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:52:10,022 INFO L85 PathProgramCache]: Analyzing trace with hash 817917912, now seen corresponding path program 3 times [2023-02-17 07:52:10,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:52:10,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325982155] [2023-02-17 07:52:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:52:10,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:52:10,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:52:10,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185162468] [2023-02-17 07:52:10,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:52:10,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:52:10,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:52:10,057 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:52:10,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 07:52:10,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 07:52:10,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:52:10,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-17 07:52:10,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:52:12,244 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 1 1))) (and (= |c_ULTIMATE.start_main_~y~0#1| (+ 1 2)) (< .cse0 |c_ULTIMATE.start_main_~k~0#1|) (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0) (<= |c_ULTIMATE.start_main_~c~0#1| (+ 1 .cse0)))) is different from true [2023-02-17 07:52:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 3 not checked. [2023-02-17 07:52:14,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:52:34,353 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| Int)) (or (= (mod (+ (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|)) 4) 0) (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|))))))) is different from true [2023-02-17 07:52:40,390 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| Int)) (or (= (mod (+ (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|)) 4) 0) (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|))))))) is different from true [2023-02-17 07:52:44,409 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-17 07:52:44,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:52:44,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325982155] [2023-02-17 07:52:44,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:52:44,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185162468] [2023-02-17 07:52:44,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185162468] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:52:44,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:52:44,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-17 07:52:44,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188746384] [2023-02-17 07:52:44,415 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:52:44,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 07:52:44,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:52:44,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 07:52:44,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=170, Unknown=8, NotChecked=116, Total=342 [2023-02-17 07:52:44,416 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 07:52:46,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:52:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:52:46,359 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-02-17 07:52:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 07:52:46,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2023-02-17 07:52:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:52:46,361 INFO L225 Difference]: With dead ends: 37 [2023-02-17 07:52:46,361 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 07:52:46,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=61, Invalid=219, Unknown=8, NotChecked=132, Total=420 [2023-02-17 07:52:46,362 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-17 07:52:46,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 94 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 28 Unchecked, 1.9s Time] [2023-02-17 07:52:46,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 07:52:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-17 07:52:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 07:52:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-17 07:52:46,370 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2023-02-17 07:52:46,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:52:46,370 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-17 07:52:46,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 07:52:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-17 07:52:46,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 07:52:46,371 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:52:46,372 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:52:46,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 07:52:46,577 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 [2023-02-17 07:52:46,578 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:52:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:52:46,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1384689793, now seen corresponding path program 4 times [2023-02-17 07:52:46,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:52:46,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780111485] [2023-02-17 07:52:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:52:46,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:52:46,601 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:52:46,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372202645] [2023-02-17 07:52:46,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 07:52:46,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:52:46,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:52:46,615 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:52:46,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 07:52:46,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 07:52:46,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:52:46,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 07:52:46,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:52:48,727 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 1 2))) (and (<= |c_ULTIMATE.start_main_~c~0#1| (+ 1 .cse0)) (= |c_ULTIMATE.start_main_~y~0#1| (+ 1 3)) (< .cse0 |c_ULTIMATE.start_main_~k~0#1|) (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0))) is different from true [2023-02-17 07:52:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 4 not checked. [2023-02-17 07:52:52,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:52:54,617 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (= 0 (+ (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~y~0#1|) (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))))) is different from false [2023-02-17 07:52:58,640 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26|)))) (= (mod (+ (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26|)) 4) 0)))) is different from true [2023-02-17 07:53:04,664 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26|)))) (= (mod (+ (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26|)) 4) 0)))) is different from true [2023-02-17 07:53:08,688 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-17 07:53:08,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:53:08,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780111485] [2023-02-17 07:53:08,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:53:08,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372202645] [2023-02-17 07:53:08,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372202645] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:53:08,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:53:08,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-17 07:53:08,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433845973] [2023-02-17 07:53:08,693 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:53:08,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 07:53:08,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:53:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 07:53:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=179, Unknown=6, NotChecked=150, Total=380 [2023-02-17 07:53:08,694 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 07:53:10,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:53:11,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:53:13,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:53:15,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:53:17,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:53:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:53:18,922 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-02-17 07:53:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 07:53:18,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 43 [2023-02-17 07:53:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:53:18,924 INFO L225 Difference]: With dead ends: 40 [2023-02-17 07:53:18,924 INFO L226 Difference]: Without dead ends: 35 [2023-02-17 07:53:18,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=58, Invalid=228, Unknown=6, NotChecked=170, Total=462 [2023-02-17 07:53:18,924 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:53:18,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 198 Invalid, 4 Unknown, 33 Unchecked, 10.2s Time] [2023-02-17 07:53:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-17 07:53:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-17 07:53:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 07:53:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-02-17 07:53:18,929 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 43 [2023-02-17 07:53:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:53:18,930 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-02-17 07:53:18,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 07:53:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-02-17 07:53:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 07:53:18,930 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:53:18,930 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:53:18,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 07:53:19,137 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 [2023-02-17 07:53:19,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:53:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:53:19,138 INFO L85 PathProgramCache]: Analyzing trace with hash -23130184, now seen corresponding path program 5 times [2023-02-17 07:53:19,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:53:19,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171085525] [2023-02-17 07:53:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:53:19,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:53:19,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:53:19,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682776392] [2023-02-17 07:53:19,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 07:53:19,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:53:19,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:53:19,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:53:19,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 07:53:19,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-17 07:53:19,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:53:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 07:53:19,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:53:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-17 07:53:19,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:53:19,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:53:19,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171085525] [2023-02-17 07:53:19,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:53:19,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682776392] [2023-02-17 07:53:19,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682776392] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:53:19,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:53:19,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-17 07:53:19,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187910111] [2023-02-17 07:53:19,347 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:53:19,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 07:53:19,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:53:19,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 07:53:19,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-02-17 07:53:19,348 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 07:53:19,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:53:19,510 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-02-17 07:53:19,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 07:53:19,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2023-02-17 07:53:19,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:53:19,511 INFO L225 Difference]: With dead ends: 43 [2023-02-17 07:53:19,511 INFO L226 Difference]: Without dead ends: 38 [2023-02-17 07:53:19,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-02-17 07:53:19,512 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:53:19,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 136 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:53:19,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-17 07:53:19,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-02-17 07:53:19,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 07:53:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-02-17 07:53:19,518 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 50 [2023-02-17 07:53:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:53:19,518 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-02-17 07:53:19,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 07:53:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-02-17 07:53:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 07:53:19,519 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:53:19,519 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:53:19,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 07:53:19,725 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 [2023-02-17 07:53:19,725 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:53:19,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:53:19,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1898941279, now seen corresponding path program 6 times [2023-02-17 07:53:19,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:53:19,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149760261] [2023-02-17 07:53:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:53:19,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:53:19,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:53:19,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493435440] [2023-02-17 07:53:19,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 07:53:19,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:53:19,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:53:19,745 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:53:19,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 07:53:19,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-17 07:53:19,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:53:19,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-17 07:53:19,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:53:21,881 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 1 0))) (and (< 0 |c_ULTIMATE.start_main_~k~0#1|) (= (+ |c_ULTIMATE.start_main_~y~0#1| (- 1)) .cse0) (= (+ |c_ULTIMATE.start_main_~c~0#1| (- 1)) .cse0) (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0))) is different from true [2023-02-17 07:53:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 19 proven. 70 refuted. 0 times theorem prover too weak. 66 trivial. 6 not checked. [2023-02-17 07:53:25,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:53:27,289 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 1 (+ 1 (+ 1 |c_ULTIMATE.start_main_~c~0#1|))))) (or (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (= 0 (let ((.cse1 (+ 1 (+ 1 (+ 1 (+ 1 |c_ULTIMATE.start_main_~y~0#1|)))))) (+ (* |c_ULTIMATE.start_main_~k~0#1| .cse1) (- (* .cse1 .cse1))))) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|))) is different from false [2023-02-17 07:53:31,317 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27| Int)) (or (= 0 (let ((.cse0 (+ 1 (+ 1 (+ 1 (+ 1 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47|)))))) (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27| .cse0) (- (* .cse0 .cse0))))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47|)) 4) 0)))) is different from true [2023-02-17 07:53:37,331 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27| Int)) (or (= 0 (let ((.cse0 (+ 1 (+ 1 (+ 1 (+ 1 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47|)))))) (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27| .cse0) (- (* .cse0 .cse0))))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47|)) 4) 0)))) is different from true [2023-02-17 07:54:05,098 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |c_ULTIMATE.start_main_~c~0#1|))))))) (or (= 0 (let ((.cse0 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |c_ULTIMATE.start_main_~y~0#1|)))))))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ .cse1 1) |ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |ULTIMATE.start_main_~k~0#1|)) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0))) is different from false [2023-02-17 07:54:05,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:54:05,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149760261] [2023-02-17 07:54:05,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:54:05,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493435440] [2023-02-17 07:54:05,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493435440] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:54:05,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:54:05,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 07:54:05,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375554378] [2023-02-17 07:54:05,103 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:54:05,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 07:54:05,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:54:05,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 07:54:05,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=383, Unknown=9, NotChecked=220, Total=702 [2023-02-17 07:54:05,105 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 07:54:07,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:54:09,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:54:11,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:54:13,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:54:15,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:54:17,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:54:19,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:54:21,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:54:22,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:54:24,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:54:24,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:54:24,936 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2023-02-17 07:54:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 07:54:24,936 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 57 [2023-02-17 07:54:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:54:24,938 INFO L225 Difference]: With dead ends: 46 [2023-02-17 07:54:24,939 INFO L226 Difference]: Without dead ends: 41 [2023-02-17 07:54:24,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=109, Invalid=502, Unknown=9, NotChecked=250, Total=870 [2023-02-17 07:54:24,939 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2023-02-17 07:54:24,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 160 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 321 Invalid, 8 Unknown, 41 Unchecked, 19.8s Time] [2023-02-17 07:54:24,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-17 07:54:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-17 07:54:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 07:54:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-02-17 07:54:24,953 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 57 [2023-02-17 07:54:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:54:24,954 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-02-17 07:54:24,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 07:54:24,954 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-02-17 07:54:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 07:54:24,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:54:24,956 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:54:24,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-17 07:54:25,163 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 [2023-02-17 07:54:25,163 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:54:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:54:25,163 INFO L85 PathProgramCache]: Analyzing trace with hash 385378200, now seen corresponding path program 7 times [2023-02-17 07:54:25,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:54:25,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618369197] [2023-02-17 07:54:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:54:25,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:54:25,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:54:25,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844386642] [2023-02-17 07:54:25,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 07:54:25,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:54:25,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:54:25,178 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:54:25,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 07:54:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:54:25,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-17 07:54:25,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:54:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-17 07:54:26,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:54:28,807 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (= 0 (+ (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~y~0#1|) (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))))) is different from false [2023-02-17 07:54:32,834 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|)))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-17 07:54:38,848 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|)))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-17 07:54:42,860 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-17 07:54:42,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:54:42,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618369197] [2023-02-17 07:54:42,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:54:42,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844386642] [2023-02-17 07:54:42,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844386642] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:54:42,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:54:42,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 07:54:42,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210308455] [2023-02-17 07:54:42,866 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:54:42,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 07:54:42,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:54:42,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 07:54:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=269, Unknown=4, NotChecked=140, Total=462 [2023-02-17 07:54:42,868 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 07:54:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:54:43,126 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2023-02-17 07:54:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 07:54:43,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 64 [2023-02-17 07:54:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:54:43,127 INFO L225 Difference]: With dead ends: 49 [2023-02-17 07:54:43,127 INFO L226 Difference]: Without dead ends: 44 [2023-02-17 07:54:43,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=68, Invalid=364, Unknown=4, NotChecked=164, Total=600 [2023-02-17 07:54:43,128 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:54:43,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 173 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:54:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-17 07:54:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-17 07:54:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 07:54:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-02-17 07:54:43,138 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2023-02-17 07:54:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:54:43,138 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-02-17 07:54:43,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 07:54:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-02-17 07:54:43,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-17 07:54:43,143 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:54:43,143 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:54:43,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-17 07:54:43,348 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 [2023-02-17 07:54:43,348 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:54:43,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:54:43,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2073985217, now seen corresponding path program 8 times [2023-02-17 07:54:43,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:54:43,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702802870] [2023-02-17 07:54:43,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:54:43,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:54:43,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:54:43,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406618810] [2023-02-17 07:54:43,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:54:43,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:54:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:54:43,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:54:43,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 07:54:43,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:54:43,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:54:43,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-17 07:54:43,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:54:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 23 proven. 127 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-17 07:54:45,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:54:45,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:54:45,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702802870] [2023-02-17 07:54:45,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:54:45,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406618810] [2023-02-17 07:54:45,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406618810] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:54:45,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:54:45,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-17 07:54:45,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093694171] [2023-02-17 07:54:45,242 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:54:45,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 07:54:45,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:54:45,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 07:54:45,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-02-17 07:54:45,243 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 07:54:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:54:45,543 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-02-17 07:54:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 07:54:45,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2023-02-17 07:54:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:54:45,544 INFO L225 Difference]: With dead ends: 52 [2023-02-17 07:54:45,544 INFO L226 Difference]: Without dead ends: 47 [2023-02-17 07:54:45,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-02-17 07:54:45,545 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 07:54:45,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 214 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 07:54:45,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-17 07:54:45,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-17 07:54:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 07:54:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-02-17 07:54:45,552 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2023-02-17 07:54:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:54:45,552 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-02-17 07:54:45,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 07:54:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-02-17 07:54:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-17 07:54:45,553 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:54:45,553 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:54:45,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 07:54:45,758 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 [2023-02-17 07:54:45,758 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:54:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:54:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1353348984, now seen corresponding path program 9 times [2023-02-17 07:54:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:54:45,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055406021] [2023-02-17 07:54:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:54:45,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:54:45,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:54:45,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518591149] [2023-02-17 07:54:45,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:54:45,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:54:45,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:54:45,768 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:54:45,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 07:54:45,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-17 07:54:45,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:54:45,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-17 07:54:45,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:54:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 28 proven. 154 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-17 07:54:47,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:54:47,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:54:47,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055406021] [2023-02-17 07:54:47,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:54:47,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518591149] [2023-02-17 07:54:47,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518591149] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:54:47,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:54:47,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-17 07:54:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611968021] [2023-02-17 07:54:47,584 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:54:47,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 07:54:47,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:54:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 07:54:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-02-17 07:54:47,585 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 07:54:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:54:47,986 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2023-02-17 07:54:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 07:54:47,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 78 [2023-02-17 07:54:47,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:54:47,987 INFO L225 Difference]: With dead ends: 55 [2023-02-17 07:54:47,987 INFO L226 Difference]: Without dead ends: 50 [2023-02-17 07:54:47,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2023-02-17 07:54:47,988 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 07:54:47,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 244 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 07:54:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-17 07:54:48,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-17 07:54:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-17 07:54:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2023-02-17 07:54:48,004 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2023-02-17 07:54:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:54:48,005 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2023-02-17 07:54:48,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 07:54:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2023-02-17 07:54:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-17 07:54:48,006 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:54:48,006 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:54:48,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 07:54:48,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-17 07:54:48,212 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:54:48,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:54:48,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1817498849, now seen corresponding path program 10 times [2023-02-17 07:54:48,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:54:48,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918829342] [2023-02-17 07:54:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:54:48,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:54:48,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:54:48,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782261898] [2023-02-17 07:54:48,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 07:54:48,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:54:48,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:54:48,227 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:54:48,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 07:54:48,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 07:54:48,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:54:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 07:54:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:54:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 51 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-17 07:54:50,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:54:52,326 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (= 0 (+ (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~y~0#1|) (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))))) is different from false [2023-02-17 07:54:56,371 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| Int)) (or (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94|)) 4) 0) (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94|))))))) is different from true [2023-02-17 07:55:02,387 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| Int)) (or (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94|)) 4) 0) (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_94|))))))) is different from true [2023-02-17 07:55:06,399 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)))) (not (= (mod (+ (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0))) is different from false [2023-02-17 07:55:06,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:55:06,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918829342] [2023-02-17 07:55:06,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:55:06,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782261898] [2023-02-17 07:55:06,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782261898] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:55:06,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:55:06,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-17 07:55:06,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184498503] [2023-02-17 07:55:06,403 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:55:06,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 07:55:06,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:55:06,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 07:55:06,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=377, Unknown=4, NotChecked=164, Total=600 [2023-02-17 07:55:06,404 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-17 07:55:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:55:06,741 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-02-17 07:55:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 07:55:06,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 85 [2023-02-17 07:55:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:55:06,742 INFO L225 Difference]: With dead ends: 58 [2023-02-17 07:55:06,742 INFO L226 Difference]: Without dead ends: 53 [2023-02-17 07:55:06,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=74, Invalid=490, Unknown=4, NotChecked=188, Total=756 [2023-02-17 07:55:06,743 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 07:55:06,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 276 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 07:55:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-17 07:55:06,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-17 07:55:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 07:55:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2023-02-17 07:55:06,750 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 85 [2023-02-17 07:55:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:55:06,750 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2023-02-17 07:55:06,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-17 07:55:06,750 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2023-02-17 07:55:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-17 07:55:06,751 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:55:06,751 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:55:06,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 07:55:06,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-17 07:55:06,951 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:55:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:55:06,952 INFO L85 PathProgramCache]: Analyzing trace with hash 638795608, now seen corresponding path program 11 times [2023-02-17 07:55:06,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:55:06,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450573215] [2023-02-17 07:55:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:55:06,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:55:06,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:55:06,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533823945] [2023-02-17 07:55:06,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 07:55:06,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:55:06,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:55:06,958 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:55:06,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 07:55:07,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-17 07:55:07,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:55:07,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-17 07:55:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:55:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 23 proven. 232 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-17 07:55:08,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:55:08,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:55:08,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450573215] [2023-02-17 07:55:08,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:55:08,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533823945] [2023-02-17 07:55:08,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533823945] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:55:08,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:55:08,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-17 07:55:08,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541132616] [2023-02-17 07:55:08,795 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:55:08,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 07:55:08,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:55:08,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 07:55:08,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-02-17 07:55:08,798 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 07:55:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:55:09,184 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2023-02-17 07:55:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 07:55:09,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 92 [2023-02-17 07:55:09,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:55:09,185 INFO L225 Difference]: With dead ends: 61 [2023-02-17 07:55:09,185 INFO L226 Difference]: Without dead ends: 56 [2023-02-17 07:55:09,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-02-17 07:55:09,185 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 07:55:09,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 310 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 07:55:09,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-17 07:55:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-02-17 07:55:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 07:55:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2023-02-17 07:55:09,204 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 92 [2023-02-17 07:55:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:55:09,204 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2023-02-17 07:55:09,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 07:55:09,205 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2023-02-17 07:55:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-17 07:55:09,205 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:55:09,206 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:55:09,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-17 07:55:09,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:55:09,412 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:55:09,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:55:09,412 INFO L85 PathProgramCache]: Analyzing trace with hash 550859009, now seen corresponding path program 12 times [2023-02-17 07:55:09,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:55:09,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591886868] [2023-02-17 07:55:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:55:09,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:55:09,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:55:09,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609857020] [2023-02-17 07:55:09,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 07:55:09,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:55:09,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:55:09,423 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:55:09,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 07:55:09,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-17 07:55:09,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:55:09,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-17 07:55:09,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:55:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 234 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-02-17 07:55:09,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:55:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 234 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-02-17 07:55:10,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:55:10,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591886868] [2023-02-17 07:55:10,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:55:10,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609857020] [2023-02-17 07:55:10,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609857020] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:55:10,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:55:10,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2023-02-17 07:55:10,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268022168] [2023-02-17 07:55:10,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:55:10,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-17 07:55:10,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:55:10,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-17 07:55:10,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 07:55:10,273 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 28 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-02-17 07:55:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:55:12,203 INFO L93 Difference]: Finished difference Result 101 states and 137 transitions. [2023-02-17 07:55:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-17 07:55:12,204 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 28 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 99 [2023-02-17 07:55:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:55:12,205 INFO L225 Difference]: With dead ends: 101 [2023-02-17 07:55:12,205 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 07:55:12,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=953, Invalid=3337, Unknown=0, NotChecked=0, Total=4290 [2023-02-17 07:55:12,206 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 189 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 07:55:12,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 463 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 07:55:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 07:55:12,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-02-17 07:55:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 27 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-02-17 07:55:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 119 transitions. [2023-02-17 07:55:12,234 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 119 transitions. Word has length 99 [2023-02-17 07:55:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:55:12,234 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 119 transitions. [2023-02-17 07:55:12,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 28 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-02-17 07:55:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 119 transitions. [2023-02-17 07:55:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-02-17 07:55:12,236 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:55:12,236 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:55:12,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 07:55:12,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 07:55:12,442 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:55:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:55:12,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1983588744, now seen corresponding path program 13 times [2023-02-17 07:55:12,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:55:12,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34887537] [2023-02-17 07:55:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:55:12,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:55:12,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:55:12,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420288253] [2023-02-17 07:55:12,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 07:55:12,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:55:12,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:55:12,451 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:55:12,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process