./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/ps6-ll_valuebound20.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 4b2ee659e7bd0f15011c822a777a938a0e6f5b3a8f826a051cccefa88973daa0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 13:00:46,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:00:46,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:00:46,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:00:46,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:00:46,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:00:46,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:00:46,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:00:46,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:00:46,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:00:46,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:00:46,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:00:46,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:00:46,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:00:46,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:00:46,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:00:46,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:00:46,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:00:46,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:00:46,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:00:46,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:00:46,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:00:46,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:00:46,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:00:46,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:00:46,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:00:46,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:00:46,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:00:46,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:00:46,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:00:46,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:00:46,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:00:46,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:00:46,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:00:46,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:00:46,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:00:46,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:00:46,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:00:46,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:00:46,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:00:46,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:00:46,598 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 13:00:46,623 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:00:46,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:00:46,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:00:46,624 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:00:46,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:00:46,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:00:46,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:00:46,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:00:46,626 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:00:46,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:00:46,627 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:00:46,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:00:46,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:00:46,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:00:46,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 13:00:46,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:00:46,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 13:00:46,628 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:00:46,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 13:00:46,628 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:00:46,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 13:00:46,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:00:46,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:00:46,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:00:46,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:00:46,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:00:46,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:00:46,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 13:00:46,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:00:46,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:00:46,630 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:00:46,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 13:00:46,631 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:00:46,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:00:46,631 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:00:46,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2ee659e7bd0f15011c822a777a938a0e6f5b3a8f826a051cccefa88973daa0 [2023-02-14 13:00:46,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:00:46,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:00:46,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:00:46,840 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:00:46,841 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:00:46,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound20.c [2023-02-14 13:00:47,726 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:00:47,909 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:00:47,909 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound20.c [2023-02-14 13:00:47,913 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f67cd3d1/c552ecda6312491ebf8a9f08e12b114c/FLAG5f8d6a12c [2023-02-14 13:00:47,927 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f67cd3d1/c552ecda6312491ebf8a9f08e12b114c [2023-02-14 13:00:47,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:00:47,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:00:47,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:00:47,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:00:47,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:00:47,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:00:47" (1/1) ... [2023-02-14 13:00:47,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78bf5625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:47, skipping insertion in model container [2023-02-14 13:00:47,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:00:47" (1/1) ... [2023-02-14 13:00:47,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:00:47,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:00:48,039 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/ps6-ll_valuebound20.c[458,471] [2023-02-14 13:00:48,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:00:48,056 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:00:48,063 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/ps6-ll_valuebound20.c[458,471] [2023-02-14 13:00:48,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:00:48,075 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:00:48,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48 WrapperNode [2023-02-14 13:00:48,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:00:48,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:00:48,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:00:48,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:00:48,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48" (1/1) ... [2023-02-14 13:00:48,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48" (1/1) ... [2023-02-14 13:00:48,094 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-02-14 13:00:48,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:00:48,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:00:48,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:00:48,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:00:48,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48" (1/1) ... [2023-02-14 13:00:48,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48" (1/1) ... [2023-02-14 13:00:48,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48" (1/1) ... [2023-02-14 13:00:48,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48" (1/1) ... [2023-02-14 13:00:48,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48" (1/1) ... [2023-02-14 13:00:48,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48" (1/1) ... [2023-02-14 13:00:48,107 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48" (1/1) ... [2023-02-14 13:00:48,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48" (1/1) ... [2023-02-14 13:00:48,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:00:48,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:00:48,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:00:48,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:00:48,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48" (1/1) ... [2023-02-14 13:00:48,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:00:48,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:00:48,131 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) [2023-02-14 13:00:48,135 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 [2023-02-14 13:00:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:00:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 13:00:48,153 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 13:00:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 13:00:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:00:48,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:00:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 13:00:48,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 13:00:48,198 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:00:48,199 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:00:48,341 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:00:48,345 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:00:48,345 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-14 13:00:48,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:00:48 BoogieIcfgContainer [2023-02-14 13:00:48,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:00:48,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:00:48,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:00:48,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:00:48,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:00:47" (1/3) ... [2023-02-14 13:00:48,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e0aa07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:00:48, skipping insertion in model container [2023-02-14 13:00:48,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:00:48" (2/3) ... [2023-02-14 13:00:48,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e0aa07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:00:48, skipping insertion in model container [2023-02-14 13:00:48,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:00:48" (3/3) ... [2023-02-14 13:00:48,361 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound20.c [2023-02-14 13:00:48,380 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:00:48,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 13:00:48,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:00:48,427 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;@2fb1f398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:00:48,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 13:00:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:00:48,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 13:00:48,448 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:00:48,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:00:48,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:00:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:00:48,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1845349065, now seen corresponding path program 1 times [2023-02-14 13:00:48,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:00:48,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435371080] [2023-02-14 13:00:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:48,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:00:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:00:48,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:00:48,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435371080] [2023-02-14 13:00:48,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 13:00:48,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955864251] [2023-02-14 13:00:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:48,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:00:48,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:00:48,554 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) [2023-02-14 13:00:48,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 13:00:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:00:48,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 13:00:48,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:00:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 13:00:48,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:00:48,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955864251] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:00:48,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:00:48,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:00:48,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724757808] [2023-02-14 13:00:48,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:00:48,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 13:00:48,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:00:48,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 13:00:48,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 13:00:48,688 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:00:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:00:48,700 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2023-02-14 13:00:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 13:00:48,702 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-14 13:00:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:00:48,710 INFO L225 Difference]: With dead ends: 45 [2023-02-14 13:00:48,710 INFO L226 Difference]: Without dead ends: 20 [2023-02-14 13:00:48,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 13:00:48,713 INFO L413 NwaCegarLoop]: 27 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, 27 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 [2023-02-14 13:00:48,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:00:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-14 13:00:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-14 13:00:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 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) [2023-02-14 13:00:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-02-14 13:00:48,735 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2023-02-14 13:00:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:00:48,735 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-02-14 13:00:48,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:00:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-02-14 13:00:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 13:00:48,739 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:00:48,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:00:48,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 13:00:48,943 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 [2023-02-14 13:00:48,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:00:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:00:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1506842435, now seen corresponding path program 1 times [2023-02-14 13:00:48,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:00:48,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195115428] [2023-02-14 13:00:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:48,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:00:48,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:00:48,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197976309] [2023-02-14 13:00:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:48,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:00:48,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:00:48,957 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) [2023-02-14 13:00:48,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 13:00:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:00:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 13:00:48,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:00:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 13:00:49,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:00:49,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:00:49,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195115428] [2023-02-14 13:00:49,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:00:49,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197976309] [2023-02-14 13:00:49,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197976309] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:00:49,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:00:49,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:00:49,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135432602] [2023-02-14 13:00:49,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:00:49,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:00:49,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:00:49,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:00:49,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:00:49,040 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 13:00:49,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:00:49,249 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-02-14 13:00:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:00:49,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-02-14 13:00:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:00:49,250 INFO L225 Difference]: With dead ends: 31 [2023-02-14 13:00:49,250 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 13:00:49,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:00:49,252 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:00:49,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:00:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 13:00:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-14 13:00:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:00:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-14 13:00:49,258 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2023-02-14 13:00:49,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:00:49,258 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-14 13:00:49,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 13:00:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-14 13:00:49,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 13:00:49,259 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:00:49,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:00:49,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 13:00:49,463 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 [2023-02-14 13:00:49,464 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:00:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:00:49,464 INFO L85 PathProgramCache]: Analyzing trace with hash 903983968, now seen corresponding path program 1 times [2023-02-14 13:00:49,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:00:49,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972893577] [2023-02-14 13:00:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:49,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:00:49,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:00:49,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783516191] [2023-02-14 13:00:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:49,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:00:49,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:00:49,485 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) [2023-02-14 13:00:49,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 13:00:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:00:49,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 13:00:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:00:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:00:49,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:00:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 13:00:49,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:00:49,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972893577] [2023-02-14 13:00:49,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:00:49,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783516191] [2023-02-14 13:00:49,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783516191] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 13:00:49,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:00:49,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-02-14 13:00:49,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69577478] [2023-02-14 13:00:49,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:00:49,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:00:49,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:00:49,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:00:49,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:00:49,908 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:00:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:00:49,945 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-02-14 13:00:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 13:00:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-02-14 13:00:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:00:49,946 INFO L225 Difference]: With dead ends: 33 [2023-02-14 13:00:49,946 INFO L226 Difference]: Without dead ends: 29 [2023-02-14 13:00:49,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-14 13:00:49,947 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:00:49,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:00:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-14 13:00:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-14 13:00:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:00:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-02-14 13:00:49,954 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2023-02-14 13:00:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:00:49,955 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-02-14 13:00:49,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:00:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-02-14 13:00:49,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 13:00:49,956 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:00:49,956 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:00:49,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 13:00:50,169 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 [2023-02-14 13:00:50,169 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:00:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:00:50,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1648043046, now seen corresponding path program 1 times [2023-02-14 13:00:50,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:00:50,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891397220] [2023-02-14 13:00:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:50,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:00:50,178 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:00:50,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266954936] [2023-02-14 13:00:50,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:00:50,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:00:50,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:00:50,180 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) [2023-02-14 13:00:50,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 13:00:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:00:50,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 13:00:50,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:00:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:00:50,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:00:54,410 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) .cse0) (not (= 0 (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 10) (* |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| 7) .cse0 (* |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| 6)) 12))))) is different from false [2023-02-14 13:01:14,502 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))) (or (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0) (= (mod (+ (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0 (* 7 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 12) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-14 13:01:33,480 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))) (or (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0) (= (mod (+ (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0 (* 7 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 12) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-14 13:01:53,693 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= 0 (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 10) (* |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| 7) .cse0 (* |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| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))))) is different from false [2023-02-14 13:01:56,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:01:56,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891397220] [2023-02-14 13:01:56,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:01:56,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266954936] [2023-02-14 13:01:56,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266954936] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:01:56,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:01:56,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-14 13:01:56,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185018288] [2023-02-14 13:01:56,321 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:01:56,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 13:01:56,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:01:56,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 13:01:56,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=106, Unknown=5, NotChecked=92, Total=240 [2023-02-14 13:01:56,322 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 13:01:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:01:56,415 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-02-14 13:01:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:01:56,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2023-02-14 13:01:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:01:56,418 INFO L225 Difference]: With dead ends: 38 [2023-02-14 13:01:56,419 INFO L226 Difference]: Without dead ends: 32 [2023-02-14 13:01:56,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=56, Invalid=165, Unknown=5, NotChecked=116, Total=342 [2023-02-14 13:01:56,423 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:01:56,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:01:56,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-14 13:01:56,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-14 13:01:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:01:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-14 13:01:56,439 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2023-02-14 13:01:56,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:01:56,440 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-14 13:01:56,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 13:01:56,440 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-14 13:01:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 13:01:56,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:01:56,442 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:01:56,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 13:01:56,653 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 [2023-02-14 13:01:56,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:01:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:01:56,653 INFO L85 PathProgramCache]: Analyzing trace with hash -426505545, now seen corresponding path program 2 times [2023-02-14 13:01:56,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:01:56,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673339874] [2023-02-14 13:01:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:01:56,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:01:56,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:01:56,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977897774] [2023-02-14 13:01:56,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:01:56,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:01:56,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:01:56,665 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) [2023-02-14 13:01:56,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 13:01:56,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:01:56,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:01:56,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 13:01:56,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:01:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-14 13:01:56,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:02:01,017 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= 0 (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 10) (* |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| 7) .cse0 (* |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| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))))) is different from false [2023-02-14 13:02:01,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:02:01,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673339874] [2023-02-14 13:02:01,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:02:01,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977897774] [2023-02-14 13:02:01,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977897774] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:02:01,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:02:01,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-14 13:02:01,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566503719] [2023-02-14 13:02:01,019 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:02:01,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 13:02:01,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:02:01,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 13:02:01,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-02-14 13:02:01,020 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 13:02:01,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:02:01,132 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-02-14 13:02:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 13:02:01,133 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2023-02-14 13:02:01,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:02:01,133 INFO L225 Difference]: With dead ends: 41 [2023-02-14 13:02:01,133 INFO L226 Difference]: Without dead ends: 35 [2023-02-14 13:02:01,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2023-02-14 13:02:01,134 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:02:01,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 127 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:02:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-14 13:02:01,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-14 13:02:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 13:02:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-02-14 13:02:01,141 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 43 [2023-02-14 13:02:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:02:01,141 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-02-14 13:02:01,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 13:02:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-02-14 13:02:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 13:02:01,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:02:01,142 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:02:01,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 13:02:01,348 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 [2023-02-14 13:02:01,349 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:02:01,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:02:01,349 INFO L85 PathProgramCache]: Analyzing trace with hash 173594938, now seen corresponding path program 3 times [2023-02-14 13:02:01,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:02:01,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566079738] [2023-02-14 13:02:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:02:01,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:02:01,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:02:01,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113930486] [2023-02-14 13:02:01,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:02:01,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:02:01,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:02:01,366 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) [2023-02-14 13:02:01,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 13:02:01,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 13:02:01,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:02:01,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-14 13:02:01,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:02:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 13:02:01,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:02:05,747 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= 0 (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 10) (* |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| 7) .cse0 (* |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| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))))) is different from false [2023-02-14 13:02:05,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:02:05,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566079738] [2023-02-14 13:02:05,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:02:05,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113930486] [2023-02-14 13:02:05,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113930486] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:02:05,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:02:05,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-14 13:02:05,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163500910] [2023-02-14 13:02:05,750 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:02:05,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 13:02:05,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:02:05,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 13:02:05,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2023-02-14 13:02:05,751 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-14 13:02:05,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:02:05,898 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-02-14 13:02:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 13:02:05,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 50 [2023-02-14 13:02:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:02:05,900 INFO L225 Difference]: With dead ends: 44 [2023-02-14 13:02:05,900 INFO L226 Difference]: Without dead ends: 38 [2023-02-14 13:02:05,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=59, Invalid=250, Unknown=1, NotChecked=32, Total=342 [2023-02-14 13:02:05,901 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:02:05,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 151 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:02:05,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-14 13:02:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-02-14 13:02:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 13:02:05,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-02-14 13:02:05,910 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 50 [2023-02-14 13:02:05,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:02:05,911 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-02-14 13:02:05,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-14 13:02:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-02-14 13:02:05,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 13:02:05,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:02:05,913 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:02:05,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 13:02:06,117 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 [2023-02-14 13:02:06,118 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:02:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:02:06,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1013596503, now seen corresponding path program 4 times [2023-02-14 13:02:06,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:02:06,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718800202] [2023-02-14 13:02:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:02:06,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:02:06,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:02:06,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844015035] [2023-02-14 13:02:06,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 13:02:06,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:02:06,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:02:06,126 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) [2023-02-14 13:02:06,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 13:02:06,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 13:02:06,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:02:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-14 13:02:06,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:02:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-14 13:02:06,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:02:06,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:02:06,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718800202] [2023-02-14 13:02:06,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:02:06,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844015035] [2023-02-14 13:02:06,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844015035] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:02:06,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:02:06,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-14 13:02:06,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105882237] [2023-02-14 13:02:06,486 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:02:06,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 13:02:06,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:02:06,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 13:02:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-02-14 13:02:06,487 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-14 13:02:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:02:06,606 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-02-14 13:02:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 13:02:06,606 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 57 [2023-02-14 13:02:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:02:06,607 INFO L225 Difference]: With dead ends: 47 [2023-02-14 13:02:06,607 INFO L226 Difference]: Without dead ends: 41 [2023-02-14 13:02:06,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-02-14 13:02:06,608 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:02:06,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 192 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:02:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-14 13:02:06,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-14 13:02:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 13:02:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-02-14 13:02:06,613 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 57 [2023-02-14 13:02:06,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:02:06,614 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-02-14 13:02:06,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-14 13:02:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-02-14 13:02:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-14 13:02:06,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:02:06,614 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:02:06,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 13:02:06,821 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 [2023-02-14 13:02:06,821 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:02:06,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:02:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash 66449050, now seen corresponding path program 5 times [2023-02-14 13:02:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:02:06,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397707889] [2023-02-14 13:02:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:02:06,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:02:06,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:02:06,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947717379] [2023-02-14 13:02:06,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 13:02:06,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:02:06,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:02:06,830 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) [2023-02-14 13:02:06,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 13:02:06,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-14 13:02:06,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:02:06,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-14 13:02:06,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:02:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 39 proven. 50 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-14 13:02:07,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:02:07,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:02:07,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397707889] [2023-02-14 13:02:07,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:02:07,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947717379] [2023-02-14 13:02:07,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947717379] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:02:07,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:02:07,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-14 13:02:07,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224320524] [2023-02-14 13:02:07,366 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:02:07,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 13:02:07,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:02:07,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 13:02:07,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2023-02-14 13:02:07,368 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-14 13:02:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:02:07,602 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2023-02-14 13:02:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 13:02:07,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 64 [2023-02-14 13:02:07,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:02:07,603 INFO L225 Difference]: With dead ends: 54 [2023-02-14 13:02:07,603 INFO L226 Difference]: Without dead ends: 48 [2023-02-14 13:02:07,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-02-14 13:02:07,604 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 10 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:02:07,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 231 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:02:07,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-14 13:02:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-02-14 13:02:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 13:02:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-02-14 13:02:07,611 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 64 [2023-02-14 13:02:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:02:07,611 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-02-14 13:02:07,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-14 13:02:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-02-14 13:02:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 13:02:07,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:02:07,612 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:02:07,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 13:02:07,812 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 [2023-02-14 13:02:07,812 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:02:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:02:07,813 INFO L85 PathProgramCache]: Analyzing trace with hash 357326839, now seen corresponding path program 6 times [2023-02-14 13:02:07,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:02:07,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400256348] [2023-02-14 13:02:07,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:02:07,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:02:07,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:02:07,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837124194] [2023-02-14 13:02:07,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 13:02:07,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:02:07,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:02:07,822 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) [2023-02-14 13:02:07,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 13:02:08,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-14 13:02:08,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:02:08,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-14 13:02:08,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:02:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 30 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-14 13:02:08,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:02:12,331 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) |c_ULTIMATE.start_main_~k~0#1|)) (not (= 0 (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 10) (* |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| 7) .cse0 (* |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| 6)) 12))) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|))) is different from false [2023-02-14 13:02:28,562 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_43| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59|))) (or (= (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_43| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_43|)) (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| 2) 1)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| 7) .cse0) 12) 0))))) is different from true [2023-02-14 13:02:46,610 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_43| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59|))) (or (= (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_43| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_43|)) (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| 2) 1)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_59| 7) .cse0) 12) 0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-14 13:03:35,764 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 3) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|) (= (+ .cse0 16 (* |c_ULTIMATE.start_main_~y~0#1| 8)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 4 |c_ULTIMATE.start_main_~k~0#1|))) (not (= 0 (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 10) (* |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| 7) .cse0 (* |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| 6)) 12))))) is different from false [2023-02-14 13:04:03,194 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= 0 (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 10) (* |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| 7) .cse0 (* |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| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |ULTIMATE.start_main_~k~0#1|) (= (+ (* 6 |ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 12) 36)) (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 5)))))) is different from false [2023-02-14 13:04:05,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:05,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400256348] [2023-02-14 13:04:05,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:04:05,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837124194] [2023-02-14 13:04:05,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837124194] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:05,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:04:05,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-14 13:04:05,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520685409] [2023-02-14 13:04:05,211 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:05,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 13:04:05,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:05,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 13:04:05,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=350, Unknown=8, NotChecked=210, Total=650 [2023-02-14 13:04:05,213 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-14 13:04:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:05,457 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-02-14 13:04:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 13:04:05,457 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 71 [2023-02-14 13:04:05,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:05,458 INFO L225 Difference]: With dead ends: 57 [2023-02-14 13:04:05,458 INFO L226 Difference]: Without dead ends: 51 [2023-02-14 13:04:05,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 54.5s TimeCoverageRelationStatistics Valid=101, Invalid=463, Unknown=8, NotChecked=240, Total=812 [2023-02-14 13:04:05,459 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:05,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 207 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:04:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-14 13:04:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-02-14 13:04:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 13:04:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2023-02-14 13:04:05,469 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 71 [2023-02-14 13:04:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:05,470 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2023-02-14 13:04:05,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-14 13:04:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2023-02-14 13:04:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-14 13:04:05,471 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:05,471 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:05,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 13:04:05,677 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 [2023-02-14 13:04:05,677 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 416422906, now seen corresponding path program 7 times [2023-02-14 13:04:05,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:05,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260281777] [2023-02-14 13:04:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:05,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:05,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:04:05,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558464541] [2023-02-14 13:04:05,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 13:04:05,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:05,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:05,686 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) [2023-02-14 13:04:05,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 13:04:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:05,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-14 13:04:05,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 41 proven. 85 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-14 13:04:05,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:10,058 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) .cse0) (not (= 0 (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 10) (* |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| 7) .cse0 (* |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| 6)) 12))))) is different from false [2023-02-14 13:04:30,113 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_51| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| 7) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| 10)) 12) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_51|) .cse0))))) is different from true [2023-02-14 13:04:48,438 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_51| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| 7) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| 10)) 12) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_74| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_51|) .cse0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-14 13:04:52,457 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) .cse0) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= 0 (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 10) (* |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| 7) .cse0 (* |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| 6)) 12))))) is different from false [2023-02-14 13:05:00,495 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= 0 (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 10) (* |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| 7) .cse0 (* |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| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))))) is different from false [2023-02-14 13:05:02,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:05:02,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260281777] [2023-02-14 13:05:02,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:05:02,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558464541] [2023-02-14 13:05:02,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558464541] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:05:02,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:05:02,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-14 13:05:02,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195985592] [2023-02-14 13:05:02,513 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:05:02,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 13:05:02,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:05:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 13:05:02,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=242, Unknown=5, NotChecked=170, Total=462 [2023-02-14 13:05:02,514 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-02-14 13:05:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:05:02,791 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2023-02-14 13:05:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 13:05:02,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 78 [2023-02-14 13:05:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:05:02,792 INFO L225 Difference]: With dead ends: 60 [2023-02-14 13:05:02,792 INFO L226 Difference]: Without dead ends: 54 [2023-02-14 13:05:02,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=63, Invalid=332, Unknown=5, NotChecked=200, Total=600 [2023-02-14 13:05:02,793 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:05:02,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 267 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:05:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-14 13:05:02,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-02-14 13:05:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-14 13:05:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2023-02-14 13:05:02,805 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 78 [2023-02-14 13:05:02,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:05:02,805 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2023-02-14 13:05:02,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-02-14 13:05:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2023-02-14 13:05:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-14 13:05:02,806 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:05:02,806 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:05:02,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 13:05:03,011 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 [2023-02-14 13:05:03,011 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:05:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:05:03,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1706793321, now seen corresponding path program 8 times [2023-02-14 13:05:03,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:05:03,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440877952] [2023-02-14 13:05:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:05:03,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:05:03,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:05:03,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899534481] [2023-02-14 13:05:03,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:05:03,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:05:03,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:05:03,027 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) [2023-02-14 13:05:03,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 13:05:04,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:05:04,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:05:04,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-14 13:05:04,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:05:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 40 proven. 115 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-02-14 13:05:04,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:05:08,975 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= 0 (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 10) (* |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| 7) .cse0 (* |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| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))))) is different from false [2023-02-14 13:05:08,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:05:08,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440877952] [2023-02-14 13:05:08,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:05:08,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899534481] [2023-02-14 13:05:08,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899534481] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:05:08,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:05:08,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-14 13:05:08,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941937669] [2023-02-14 13:05:08,977 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 13:05:08,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 13:05:08,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:05:08,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 13:05:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2023-02-14 13:05:08,978 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-02-14 13:05:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:05:09,272 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-02-14 13:05:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 13:05:09,272 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 85 [2023-02-14 13:05:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:05:09,273 INFO L225 Difference]: With dead ends: 63 [2023-02-14 13:05:09,273 INFO L226 Difference]: Without dead ends: 57 [2023-02-14 13:05:09,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=74, Invalid=435, Unknown=1, NotChecked=42, Total=552 [2023-02-14 13:05:09,273 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:05:09,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 301 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 13:05:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-14 13:05:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-14 13:05:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 13:05:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2023-02-14 13:05:09,281 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 85 [2023-02-14 13:05:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:05:09,281 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2023-02-14 13:05:09,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-02-14 13:05:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2023-02-14 13:05:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-14 13:05:09,286 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:05:09,287 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:05:09,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 13:05:09,493 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 [2023-02-14 13:05:09,493 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:05:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:05:09,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1063034534, now seen corresponding path program 9 times [2023-02-14 13:05:09,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:05:09,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858591538] [2023-02-14 13:05:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:05:09,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:05:09,501 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 13:05:09,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68229499] [2023-02-14 13:05:09,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:05:09,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:05:09,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:05:09,502 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) [2023-02-14 13:05:09,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process