./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/ps4-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/ps4-ll.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 ef01badb7f90b6597aa83d48583be40b7afc9a4c054f915d626bd89be70c7009 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 16:30:21,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 16:30:21,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 16:30:21,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 16:30:21,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 16:30:21,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 16:30:21,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 16:30:21,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 16:30:21,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 16:30:21,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 16:30:21,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 16:30:21,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 16:30:21,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 16:30:21,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 16:30:21,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 16:30:21,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 16:30:21,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 16:30:21,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 16:30:21,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 16:30:21,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 16:30:21,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 16:30:21,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 16:30:21,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 16:30:21,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 16:30:21,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 16:30:21,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 16:30:21,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 16:30:21,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 16:30:21,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 16:30:21,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 16:30:21,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 16:30:21,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 16:30:21,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 16:30:21,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 16:30:21,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 16:30:21,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 16:30:21,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 16:30:21,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 16:30:21,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 16:30:21,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 16:30:21,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 16:30:21,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 16:30:21,255 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 16:30:21,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 16:30:21,256 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 16:30:21,256 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 16:30:21,257 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 16:30:21,257 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 16:30:21,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 16:30:21,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 16:30:21,258 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 16:30:21,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 16:30:21,258 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 16:30:21,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 16:30:21,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 16:30:21,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 16:30:21,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 16:30:21,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 16:30:21,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 16:30:21,260 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 16:30:21,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 16:30:21,260 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 16:30:21,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 16:30:21,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 16:30:21,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 16:30:21,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 16:30:21,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 16:30:21,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 16:30:21,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 16:30:21,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 16:30:21,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 16:30:21,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 16:30:21,262 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 16:30:21,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 16:30:21,262 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 16:30:21,263 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 16:30:21,263 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 16:30:21,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef01badb7f90b6597aa83d48583be40b7afc9a4c054f915d626bd89be70c7009 [2023-02-18 16:30:21,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 16:30:21,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 16:30:21,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 16:30:21,516 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 16:30:21,516 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 16:30:21,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/ps4-ll.c [2023-02-18 16:30:22,583 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 16:30:22,770 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 16:30:22,770 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps4-ll.c [2023-02-18 16:30:22,776 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5eb7ebd2/d83935393e47452489b5639bdfb66f74/FLAG233305fa7 [2023-02-18 16:30:22,791 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5eb7ebd2/d83935393e47452489b5639bdfb66f74 [2023-02-18 16:30:22,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 16:30:22,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 16:30:22,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 16:30:22,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 16:30:22,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 16:30:22,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:22,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fddf889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22, skipping insertion in model container [2023-02-18 16:30:22,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:22,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 16:30:22,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 16:30:22,956 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/ps4-ll.c[458,471] [2023-02-18 16:30:22,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 16:30:22,974 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 16:30:22,983 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/ps4-ll.c[458,471] [2023-02-18 16:30:22,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 16:30:22,998 INFO L208 MainTranslator]: Completed translation [2023-02-18 16:30:22,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22 WrapperNode [2023-02-18 16:30:22,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 16:30:23,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 16:30:23,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 16:30:23,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 16:30:23,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:23,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:23,025 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2023-02-18 16:30:23,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 16:30:23,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 16:30:23,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 16:30:23,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 16:30:23,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:23,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:23,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:23,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:23,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:23,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:23,047 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:23,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:23,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 16:30:23,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 16:30:23,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 16:30:23,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 16:30:23,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22" (1/1) ... [2023-02-18 16:30:23,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 16:30:23,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:30:23,081 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) [2023-02-18 16:30:23,090 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 [2023-02-18 16:30:23,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 16:30:23,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 16:30:23,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 16:30:23,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 16:30:23,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 16:30:23,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 16:30:23,165 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 16:30:23,166 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 16:30:23,281 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 16:30:23,285 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 16:30:23,286 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 16:30:23,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:30:23 BoogieIcfgContainer [2023-02-18 16:30:23,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 16:30:23,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 16:30:23,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 16:30:23,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 16:30:23,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 04:30:22" (1/3) ... [2023-02-18 16:30:23,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c0c167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:30:23, skipping insertion in model container [2023-02-18 16:30:23,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:30:22" (2/3) ... [2023-02-18 16:30:23,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c0c167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:30:23, skipping insertion in model container [2023-02-18 16:30:23,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:30:23" (3/3) ... [2023-02-18 16:30:23,294 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll.c [2023-02-18 16:30:23,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 16:30:23,336 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 16:30:23,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 16:30:23,410 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;@1b6612fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 16:30:23,410 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 16:30:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 16:30:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 16:30:23,420 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:30:23,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:30:23,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:30:23,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:30:23,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1818834085, now seen corresponding path program 1 times [2023-02-18 16:30:23,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:30:23,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54755002] [2023-02-18 16:30:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:23,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:30:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:30:23,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:30:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54755002] [2023-02-18 16:30:23,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 16:30:23,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327048514] [2023-02-18 16:30:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:23,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:30:23,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:30:23,553 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) [2023-02-18 16:30:23,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 16:30:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:30:23,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 16:30:23,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:30:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:30:23,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:30:23,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327048514] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:30:23,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:30:23,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 16:30:23,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029120058] [2023-02-18 16:30:23,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:30:23,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 16:30:23,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:30:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 16:30:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 16:30:23,651 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:30:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:30:23,666 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2023-02-18 16:30:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 16:30:23,668 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 16:30:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:30:23,674 INFO L225 Difference]: With dead ends: 32 [2023-02-18 16:30:23,674 INFO L226 Difference]: Without dead ends: 13 [2023-02-18 16:30:23,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 16:30:23,680 INFO L413 NwaCegarLoop]: 19 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, 19 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 [2023-02-18 16:30:23,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:30:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-18 16:30:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-18 16:30:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 16:30:23,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-18 16:30:23,707 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-02-18 16:30:23,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:30:23,708 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-18 16:30:23,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:30:23,708 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-18 16:30:23,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 16:30:23,709 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:30:23,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:30:23,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 16:30:23,915 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 [2023-02-18 16:30:23,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:30:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:30:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1811386335, now seen corresponding path program 1 times [2023-02-18 16:30:23,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:30:23,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83060819] [2023-02-18 16:30:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:23,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:30:23,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:30:23,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123054977] [2023-02-18 16:30:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:23,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:30:23,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:30:23,932 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) [2023-02-18 16:30:23,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 16:30:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:30:23,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 16:30:23,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:30:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:30:24,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:30:24,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:30:24,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83060819] [2023-02-18 16:30:24,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:30:24,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123054977] [2023-02-18 16:30:24,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123054977] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:30:24,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:30:24,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 16:30:24,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632737472] [2023-02-18 16:30:24,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:30:24,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 16:30:24,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:30:24,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 16:30:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 16:30:24,021 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:30:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:30:24,078 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-02-18 16:30:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 16:30:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 16:30:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:30:24,079 INFO L225 Difference]: With dead ends: 24 [2023-02-18 16:30:24,079 INFO L226 Difference]: Without dead ends: 20 [2023-02-18 16:30:24,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 16:30:24,081 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:30:24,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:30:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-18 16:30:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-18 16:30:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 16:30:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-02-18 16:30:24,088 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 7 [2023-02-18 16:30:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:30:24,088 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-02-18 16:30:24,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:30:24,089 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-02-18 16:30:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 16:30:24,089 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:30:24,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:30:24,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 16:30:24,294 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 [2023-02-18 16:30:24,295 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:30:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:30:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash -555889191, now seen corresponding path program 1 times [2023-02-18 16:30:24,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:30:24,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736592745] [2023-02-18 16:30:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:24,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:30:24,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:30:24,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226375514] [2023-02-18 16:30:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:24,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:30:24,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:30:24,307 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) [2023-02-18 16:30:24,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 16:30:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:30:24,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 16:30:24,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:30:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:30:24,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:30:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:30:24,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:30:24,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736592745] [2023-02-18 16:30:24,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:30:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226375514] [2023-02-18 16:30:24,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226375514] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:30:24,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:30:24,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-18 16:30:24,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079278146] [2023-02-18 16:30:24,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:30:24,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 16:30:24,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:30:24,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 16:30:24,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 16:30:24,520 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 16:30:24,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:30:24,659 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-02-18 16:30:24,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 16:30:24,660 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-02-18 16:30:24,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:30:24,661 INFO L225 Difference]: With dead ends: 31 [2023-02-18 16:30:24,661 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 16:30:24,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 16:30:24,662 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:30:24,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:30:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 16:30:24,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2023-02-18 16:30:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 16:30:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-02-18 16:30:24,670 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2023-02-18 16:30:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:30:24,670 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-02-18 16:30:24,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 16:30:24,671 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-02-18 16:30:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 16:30:24,671 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:30:24,671 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:30:24,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 16:30:24,883 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 [2023-02-18 16:30:24,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:30:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:30:24,884 INFO L85 PathProgramCache]: Analyzing trace with hash 219170934, now seen corresponding path program 1 times [2023-02-18 16:30:24,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:30:24,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269318441] [2023-02-18 16:30:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:24,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:30:24,895 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:30:24,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973729550] [2023-02-18 16:30:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:24,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:30:24,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:30:24,898 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) [2023-02-18 16:30:24,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 16:30:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:30:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 16:30:24,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:30:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 16:30:25,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:30:27,210 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 16:30:27,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:30:27,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269318441] [2023-02-18 16:30:27,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:30:27,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973729550] [2023-02-18 16:30:27,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973729550] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:30:27,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:30:27,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-18 16:30:27,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670946355] [2023-02-18 16:30:27,214 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:30:27,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 16:30:27,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:30:27,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 16:30:27,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=125, Unknown=1, NotChecked=22, Total=182 [2023-02-18 16:30:27,216 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 16:30:27,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:30:27,315 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2023-02-18 16:30:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 16:30:27,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-02-18 16:30:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:30:27,318 INFO L225 Difference]: With dead ends: 29 [2023-02-18 16:30:27,320 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 16:30:27,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=53, Invalid=190, Unknown=1, NotChecked=28, Total=272 [2023-02-18 16:30:27,324 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:30:27,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:30:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 16:30:27,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-18 16:30:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 16:30:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-02-18 16:30:27,339 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2023-02-18 16:30:27,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:30:27,342 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-02-18 16:30:27,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 16:30:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-02-18 16:30:27,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 16:30:27,343 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:30:27,343 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 16:30:27,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 16:30:27,548 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 [2023-02-18 16:30:27,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:30:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:30:27,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1804341436, now seen corresponding path program 2 times [2023-02-18 16:30:27,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:30:27,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813163068] [2023-02-18 16:30:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:27,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:30:27,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:30:27,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346466638] [2023-02-18 16:30:27,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:30:27,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:30:27,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:30:27,582 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) [2023-02-18 16:30:27,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 16:30:27,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:30:27,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:30:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-18 16:30:27,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:30:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:30:27,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:30:27,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:30:27,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813163068] [2023-02-18 16:30:27,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:30:27,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346466638] [2023-02-18 16:30:27,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346466638] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:30:27,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:30:27,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-18 16:30:27,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067898779] [2023-02-18 16:30:27,940 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:30:27,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 16:30:27,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:30:27,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 16:30:27,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-02-18 16:30:27,943 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 16:30:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:30:28,083 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-02-18 16:30:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 16:30:28,083 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-02-18 16:30:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:30:28,084 INFO L225 Difference]: With dead ends: 36 [2023-02-18 16:30:28,084 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 16:30:28,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-02-18 16:30:28,085 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:30:28,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 57 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:30:28,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 16:30:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-18 16:30:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 16:30:28,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-02-18 16:30:28,094 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2023-02-18 16:30:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:30:28,094 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-02-18 16:30:28,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 16:30:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-02-18 16:30:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 16:30:28,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:30:28,095 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2023-02-18 16:30:28,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 16:30:28,300 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 [2023-02-18 16:30:28,301 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:30:28,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:30:28,303 INFO L85 PathProgramCache]: Analyzing trace with hash 793873846, now seen corresponding path program 3 times [2023-02-18 16:30:28,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:30:28,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062724390] [2023-02-18 16:30:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:28,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:30:28,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:30:28,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570087270] [2023-02-18 16:30:28,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:30:28,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:30:28,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:30:28,318 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) [2023-02-18 16:30:28,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 16:30:28,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 16:30:28,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:30:28,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 16:30:28,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:30:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 16:30:28,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:30:30,544 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 16:30:30,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:30:30,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062724390] [2023-02-18 16:30:30,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:30:30,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570087270] [2023-02-18 16:30:30,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570087270] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:30:30,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:30:30,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-18 16:30:30,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875797042] [2023-02-18 16:30:30,547 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:30:30,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 16:30:30,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:30:30,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 16:30:30,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2023-02-18 16:30:30,549 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) [2023-02-18 16:30:30,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:30:30,691 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2023-02-18 16:30:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 16:30:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2023-02-18 16:30:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:30:30,692 INFO L225 Difference]: With dead ends: 39 [2023-02-18 16:30:30,692 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 16:30:30,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=59, Invalid=250, Unknown=1, NotChecked=32, Total=342 [2023-02-18 16:30:30,693 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:30:30,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 72 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:30:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 16:30:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-02-18 16:30:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 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) [2023-02-18 16:30:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-02-18 16:30:30,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 34 [2023-02-18 16:30:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:30:30,703 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-02-18 16:30:30,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) [2023-02-18 16:30:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-02-18 16:30:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 16:30:30,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:30:30,705 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 16:30:30,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 16:30:30,909 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 [2023-02-18 16:30:30,910 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:30:30,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:30:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash 395207548, now seen corresponding path program 4 times [2023-02-18 16:30:30,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:30:30,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24247158] [2023-02-18 16:30:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:30,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:30:30,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:30:30,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825186867] [2023-02-18 16:30:30,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:30:30,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:30:30,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:30:30,920 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) [2023-02-18 16:30:30,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 16:30:30,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:30:30,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:30:30,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 16:30:30,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:30:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 16:30:31,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:30:31,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:30:31,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24247158] [2023-02-18 16:30:31,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:30:31,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825186867] [2023-02-18 16:30:31,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825186867] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:30:31,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:30:31,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-18 16:30:31,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824733065] [2023-02-18 16:30:31,133 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:30:31,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 16:30:31,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:30:31,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 16:30:31,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-18 16:30:31,137 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 16:30:31,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:30:31,295 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2023-02-18 16:30:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 16:30:31,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 41 [2023-02-18 16:30:31,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:30:31,296 INFO L225 Difference]: With dead ends: 42 [2023-02-18 16:30:31,296 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 16:30:31,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-02-18 16:30:31,297 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:30:31,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 90 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:30:31,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 16:30:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-18 16:30:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2023-02-18 16:30:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-02-18 16:30:31,308 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 41 [2023-02-18 16:30:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:30:31,309 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-02-18 16:30:31,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 16:30:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-02-18 16:30:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 16:30:31,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:30:31,310 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2023-02-18 16:30:31,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 16:30:31,510 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 [2023-02-18 16:30:31,511 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:30:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:30:31,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1716560630, now seen corresponding path program 5 times [2023-02-18 16:30:31,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:30:31,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458306569] [2023-02-18 16:30:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:31,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:30:31,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:30:31,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795693158] [2023-02-18 16:30:31,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:30:31,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:30:31,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:30:31,521 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) [2023-02-18 16:30:31,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 16:30:31,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-18 16:30:31,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:30:31,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 16:30:31,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:30:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-18 16:30:31,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:30:33,906 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)))) (not (= 0 (let ((.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (let ((.cse1 (- .cse2))) (+ (+ (+ (* 4 (div (+ (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (* (- 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) .cse1) (- 4))) (- (* (* .cse2 |c_ULTIMATE.start_main_~y~0#1|) |c_ULTIMATE.start_main_~y~0#1|))) (- (* (* (* 2 |c_ULTIMATE.start_main_~y~0#1|) |c_ULTIMATE.start_main_~y~0#1|) |c_ULTIMATE.start_main_~y~0#1|))) .cse1)))))) is different from false [2023-02-18 16:30:33,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:30:33,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458306569] [2023-02-18 16:30:33,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:30:33,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795693158] [2023-02-18 16:30:33,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795693158] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:30:33,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:30:33,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-18 16:30:33,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715305156] [2023-02-18 16:30:33,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:30:33,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 16:30:33,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:30:33,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 16:30:33,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=356, Unknown=1, NotChecked=38, Total=462 [2023-02-18 16:30:33,911 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 16:30:34,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:30:34,139 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2023-02-18 16:30:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 16:30:34,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2023-02-18 16:30:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:30:34,140 INFO L225 Difference]: With dead ends: 49 [2023-02-18 16:30:34,140 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 16:30:34,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=90, Invalid=465, Unknown=1, NotChecked=44, Total=600 [2023-02-18 16:30:34,141 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:30:34,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 129 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:30:34,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 16:30:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-18 16:30:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 16:30:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2023-02-18 16:30:34,151 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 48 [2023-02-18 16:30:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:30:34,151 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2023-02-18 16:30:34,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 16:30:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2023-02-18 16:30:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 16:30:34,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:30:34,153 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2023-02-18 16:30:34,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 16:30:34,358 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 [2023-02-18 16:30:34,358 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:30:34,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:30:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1151919676, now seen corresponding path program 6 times [2023-02-18 16:30:34,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:30:34,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413629328] [2023-02-18 16:30:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:34,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:30:34,369 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:30:34,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915834508] [2023-02-18 16:30:34,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:30:34,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:30:34,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:30:34,371 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) [2023-02-18 16:30:34,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 16:30:34,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 16:30:34,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:30:34,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 16:30:34,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:30:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-18 16:30:34,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:30:34,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:30:34,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413629328] [2023-02-18 16:30:34,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:30:34,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915834508] [2023-02-18 16:30:34,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915834508] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:30:34,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:30:34,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-18 16:30:34,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91721710] [2023-02-18 16:30:34,857 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:30:34,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 16:30:34,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:30:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 16:30:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-02-18 16:30:34,859 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 16:30:35,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:30:35,070 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2023-02-18 16:30:35,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 16:30:35,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2023-02-18 16:30:35,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:30:35,072 INFO L225 Difference]: With dead ends: 52 [2023-02-18 16:30:35,072 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 16:30:35,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-02-18 16:30:35,073 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:30:35,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 132 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:30:35,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 16:30:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-18 16:30:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 16:30:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-02-18 16:30:35,084 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 55 [2023-02-18 16:30:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:30:35,084 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-02-18 16:30:35,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 16:30:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-02-18 16:30:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-18 16:30:35,085 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:30:35,085 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2023-02-18 16:30:35,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 16:30:35,292 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 [2023-02-18 16:30:35,292 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:30:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:30:35,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1772193846, now seen corresponding path program 7 times [2023-02-18 16:30:35,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:30:35,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629125769] [2023-02-18 16:30:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:30:35,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:30:35,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:30:35,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836187245] [2023-02-18 16:30:35,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:30:35,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:30:35,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:30:35,309 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) [2023-02-18 16:30:35,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 16:30:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:30:35,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 16:30:35,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:30:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-18 16:30:35,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:31:05,613 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_21| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_21| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|)))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|)) 4) 0)))) is different from true [2023-02-18 16:31:11,641 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_21| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_21| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|)))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_53|)) 4) 0)))) is different from true [2023-02-18 16:31:15,658 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 16:31:15,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:31:15,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629125769] [2023-02-18 16:31:15,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:31:15,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836187245] [2023-02-18 16:31:15,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836187245] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:31:15,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:31:15,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-18 16:31:15,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985202194] [2023-02-18 16:31:15,665 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:31:15,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 16:31:15,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:31:15,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 16:31:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=286, Unknown=14, NotChecked=108, Total=462 [2023-02-18 16:31:15,666 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 16:31:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:31:15,933 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2023-02-18 16:31:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 16:31:15,933 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 62 [2023-02-18 16:31:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:31:15,934 INFO L225 Difference]: With dead ends: 55 [2023-02-18 16:31:15,934 INFO L226 Difference]: Without dead ends: 50 [2023-02-18 16:31:15,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=74, Invalid=386, Unknown=14, NotChecked=126, Total=600 [2023-02-18 16:31:15,935 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:31:15,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 167 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:31:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-18 16:31:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-18 16:31:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 16:31:15,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2023-02-18 16:31:15,944 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 62 [2023-02-18 16:31:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:31:15,944 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2023-02-18 16:31:15,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 16:31:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2023-02-18 16:31:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-18 16:31:15,946 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:31:15,946 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2023-02-18 16:31:15,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 16:31:16,151 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 [2023-02-18 16:31:16,152 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:31:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:31:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1288149244, now seen corresponding path program 8 times [2023-02-18 16:31:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:31:16,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497116058] [2023-02-18 16:31:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:31:16,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:31:16,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:31:16,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179106833] [2023-02-18 16:31:16,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:31:16,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:31:16,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:31:16,175 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) [2023-02-18 16:31:16,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 16:31:16,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:31:16,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:31:16,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 16:31:16,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:31:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 38 proven. 112 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-18 16:31:16,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:31:18,513 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 16:31:18,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:31:18,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497116058] [2023-02-18 16:31:18,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:31:18,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179106833] [2023-02-18 16:31:18,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179106833] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:31:18,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:31:18,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-18 16:31:18,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882988760] [2023-02-18 16:31:18,515 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:31:18,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 16:31:18,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:31:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 16:31:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2023-02-18 16:31:18,516 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 16:31:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:31:18,803 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-02-18 16:31:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 16:31:18,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 69 [2023-02-18 16:31:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:31:18,804 INFO L225 Difference]: With dead ends: 58 [2023-02-18 16:31:18,804 INFO L226 Difference]: Without dead ends: 53 [2023-02-18 16:31:18,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=74, Invalid=435, Unknown=1, NotChecked=42, Total=552 [2023-02-18 16:31:18,805 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:31:18,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 182 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:31:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-18 16:31:18,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-18 16:31:18,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 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) [2023-02-18 16:31:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2023-02-18 16:31:18,815 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 69 [2023-02-18 16:31:18,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:31:18,816 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2023-02-18 16:31:18,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 16:31:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2023-02-18 16:31:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-18 16:31:18,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:31:18,817 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2023-02-18 16:31:18,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 16:31:19,023 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 [2023-02-18 16:31:19,023 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:31:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:31:19,023 INFO L85 PathProgramCache]: Analyzing trace with hash 500710774, now seen corresponding path program 9 times [2023-02-18 16:31:19,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:31:19,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068818395] [2023-02-18 16:31:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:31:19,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:31:19,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:31:19,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76122884] [2023-02-18 16:31:19,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:31:19,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:31:19,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:31:19,044 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) [2023-02-18 16:31:19,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 16:31:19,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-18 16:31:19,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:31:19,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 16:31:19,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:31:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 40 proven. 142 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-18 16:31:20,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:31:20,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:31:20,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068818395] [2023-02-18 16:31:20,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:31:20,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76122884] [2023-02-18 16:31:20,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76122884] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:31:20,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:31:20,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 16:31:20,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452337752] [2023-02-18 16:31:20,858 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:31:20,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 16:31:20,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:31:20,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 16:31:20,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-02-18 16:31:20,860 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 16:31:21,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:31:21,150 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-02-18 16:31:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 16:31:21,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 76 [2023-02-18 16:31:21,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:31:21,151 INFO L225 Difference]: With dead ends: 61 [2023-02-18 16:31:21,151 INFO L226 Difference]: Without dead ends: 56 [2023-02-18 16:31:21,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2023-02-18 16:31:21,152 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:31:21,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 210 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:31:21,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-18 16:31:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-02-18 16:31:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 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) [2023-02-18 16:31:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2023-02-18 16:31:21,162 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 76 [2023-02-18 16:31:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:31:21,163 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2023-02-18 16:31:21,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 16:31:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2023-02-18 16:31:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-02-18 16:31:21,164 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:31:21,164 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2023-02-18 16:31:21,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 16:31:21,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 16:31:21,373 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:31:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:31:21,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1126794308, now seen corresponding path program 10 times [2023-02-18 16:31:21,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:31:21,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817525475] [2023-02-18 16:31:21,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:31:21,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:31:21,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:31:21,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471749132] [2023-02-18 16:31:21,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:31:21,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:31:21,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:31:21,382 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:31:21,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 16:31:21,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:31:21,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:31:21,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-18 16:31:21,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:31:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 21 proven. 196 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-18 16:31:21,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:31:21,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:31:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817525475] [2023-02-18 16:31:21,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:31:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471749132] [2023-02-18 16:31:21,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471749132] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:31:21,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:31:21,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-18 16:31:21,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676858556] [2023-02-18 16:31:21,933 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:31:21,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 16:31:21,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:31:21,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 16:31:21,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-02-18 16:31:21,934 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 16:31:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:31:22,302 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2023-02-18 16:31:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 16:31:22,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 83 [2023-02-18 16:31:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:31:22,304 INFO L225 Difference]: With dead ends: 64 [2023-02-18 16:31:22,304 INFO L226 Difference]: Without dead ends: 59 [2023-02-18 16:31:22,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-02-18 16:31:22,305 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:31:22,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 254 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:31:22,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-18 16:31:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-02-18 16:31:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 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) [2023-02-18 16:31:22,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2023-02-18 16:31:22,316 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 83 [2023-02-18 16:31:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:31:22,316 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2023-02-18 16:31:22,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 16:31:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2023-02-18 16:31:22,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-18 16:31:22,317 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:31:22,317 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2023-02-18 16:31:22,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 16:31:22,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 16:31:22,524 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:31:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:31:22,525 INFO L85 PathProgramCache]: Analyzing trace with hash -729234762, now seen corresponding path program 11 times [2023-02-18 16:31:22,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:31:22,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486644236] [2023-02-18 16:31:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:31:22,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:31:22,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:31:22,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276388234] [2023-02-18 16:31:22,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:31:22,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:31:22,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:31:22,532 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:31:22,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 16:31:22,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-18 16:31:22,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:31:22,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-18 16:31:22,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:31:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 41 proven. 214 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-18 16:31:22,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:31:23,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:31:23,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486644236] [2023-02-18 16:31:23,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:31:23,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276388234] [2023-02-18 16:31:23,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276388234] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:31:23,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:31:23,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-18 16:31:23,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334008860] [2023-02-18 16:31:23,021 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:31:23,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 16:31:23,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:31:23,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 16:31:23,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-02-18 16:31:23,023 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 16:31:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:31:23,366 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2023-02-18 16:31:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 16:31:23,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 90 [2023-02-18 16:31:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:31:23,367 INFO L225 Difference]: With dead ends: 67 [2023-02-18 16:31:23,367 INFO L226 Difference]: Without dead ends: 62 [2023-02-18 16:31:23,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-02-18 16:31:23,368 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:31:23,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 272 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:31:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-18 16:31:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-02-18 16:31:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 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) [2023-02-18 16:31:23,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2023-02-18 16:31:23,380 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 90 [2023-02-18 16:31:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:31:23,381 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2023-02-18 16:31:23,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 16:31:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2023-02-18 16:31:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-02-18 16:31:23,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:31:23,382 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2023-02-18 16:31:23,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 16:31:23,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:31:23,593 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:31:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:31:23,593 INFO L85 PathProgramCache]: Analyzing trace with hash 348229244, now seen corresponding path program 12 times [2023-02-18 16:31:23,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:31:23,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694203971] [2023-02-18 16:31:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:31:23,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:31:23,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:31:23,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966049077] [2023-02-18 16:31:23,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:31:23,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:31:23,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:31:23,603 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:31:23,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 16:31:23,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-18 16:31:23,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:31:23,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-18 16:31:23,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:31:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 49 proven. 247 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-18 16:31:25,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:31:25,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:31:25,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694203971] [2023-02-18 16:31:25,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:31:25,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966049077] [2023-02-18 16:31:25,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966049077] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:31:25,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:31:25,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-18 16:31:25,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106504728] [2023-02-18 16:31:25,582 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:31:25,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 16:31:25,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:31:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 16:31:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2023-02-18 16:31:25,583 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 16:31:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:31:25,997 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2023-02-18 16:31:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 16:31:25,998 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 97 [2023-02-18 16:31:25,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:31:25,998 INFO L225 Difference]: With dead ends: 70 [2023-02-18 16:31:25,998 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 16:31:25,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2023-02-18 16:31:25,999 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:31:26,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 306 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 16:31:26,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 16:31:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-18 16:31:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 16:31:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2023-02-18 16:31:26,016 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 97 [2023-02-18 16:31:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:31:26,017 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2023-02-18 16:31:26,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 16:31:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2023-02-18 16:31:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-18 16:31:26,018 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:31:26,018 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2023-02-18 16:31:26,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 16:31:26,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 16:31:26,225 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:31:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:31:26,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1941497866, now seen corresponding path program 13 times [2023-02-18 16:31:26,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:31:26,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334894679] [2023-02-18 16:31:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:31:26,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:31:26,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:31:26,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357814493] [2023-02-18 16:31:26,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:31:26,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:31:26,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:31:26,232 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:31:26,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 16:31:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:31:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 16:31:26,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:31:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 66 proven. 274 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-02-18 16:31:26,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:31:48,748 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39| Int)) (or (= (mod (+ (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134|)) 4) 0) (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134|))))))) is different from true [2023-02-18 16:31:54,767 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39| Int)) (or (= (mod (+ (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134|)) 4) 0) (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_134|))))))) is different from true [2023-02-18 16:31:58,779 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 16:31:58,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:31:58,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334894679] [2023-02-18 16:31:58,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:31:58,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357814493] [2023-02-18 16:31:58,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357814493] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:31:58,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:31:58,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-02-18 16:31:58,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949885459] [2023-02-18 16:31:58,784 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:31:58,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 16:31:58,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:31:58,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 16:31:58,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=537, Unknown=9, NotChecked=144, Total=756 [2023-02-18 16:31:58,785 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 16:31:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:31:59,282 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2023-02-18 16:31:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 16:31:59,282 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 104 [2023-02-18 16:31:59,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:31:59,283 INFO L225 Difference]: With dead ends: 73 [2023-02-18 16:31:59,283 INFO L226 Difference]: Without dead ends: 68 [2023-02-18 16:31:59,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=86, Invalid=673, Unknown=9, NotChecked=162, Total=930 [2023-02-18 16:31:59,284 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:31:59,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 359 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:31:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-18 16:31:59,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-02-18 16:31:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 16:31:59,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2023-02-18 16:31:59,298 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 104 [2023-02-18 16:31:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:31:59,298 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2023-02-18 16:31:59,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 16:31:59,298 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2023-02-18 16:31:59,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-18 16:31:59,299 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:31:59,299 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2023-02-18 16:31:59,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 16:31:59,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 16:31:59,506 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:31:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:31:59,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2022387396, now seen corresponding path program 14 times [2023-02-18 16:31:59,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:31:59,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257390236] [2023-02-18 16:31:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:31:59,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:31:59,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:31:59,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603040762] [2023-02-18 16:31:59,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:31:59,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:31:59,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:31:59,514 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:31:59,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 16:31:59,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:31:59,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:31:59,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 16:31:59,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:31:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 68 proven. 319 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-18 16:31:59,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:32:01,968 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 16:32:01,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:32:01,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257390236] [2023-02-18 16:32:01,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:32:01,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603040762] [2023-02-18 16:32:01,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603040762] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:32:01,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:32:01,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-18 16:32:01,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416436094] [2023-02-18 16:32:01,970 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:32:01,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 16:32:01,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:32:01,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 16:32:01,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=580, Unknown=1, NotChecked=48, Total=702 [2023-02-18 16:32:01,972 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 16:32:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:32:02,486 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2023-02-18 16:32:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 16:32:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 111 [2023-02-18 16:32:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:32:02,487 INFO L225 Difference]: With dead ends: 76 [2023-02-18 16:32:02,487 INFO L226 Difference]: Without dead ends: 71 [2023-02-18 16:32:02,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=92, Invalid=723, Unknown=1, NotChecked=54, Total=870 [2023-02-18 16:32:02,488 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:32:02,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 398 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:32:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-18 16:32:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-02-18 16:32:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 16:32:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2023-02-18 16:32:02,499 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 111 [2023-02-18 16:32:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:32:02,499 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2023-02-18 16:32:02,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 16:32:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2023-02-18 16:32:02,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-18 16:32:02,500 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:32:02,500 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2023-02-18 16:32:02,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 16:32:02,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 16:32:02,701 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:32:02,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:32:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash 816266550, now seen corresponding path program 15 times [2023-02-18 16:32:02,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:32:02,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104745755] [2023-02-18 16:32:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:32:02,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:32:02,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:32:02,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237838179] [2023-02-18 16:32:02,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:32:02,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:32:02,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:32:02,708 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:32:02,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 16:32:03,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-02-18 16:32:03,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:32:03,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-18 16:32:03,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:32:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 49 proven. 388 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-18 16:32:03,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:32:03,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:32:03,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104745755] [2023-02-18 16:32:03,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:32:03,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237838179] [2023-02-18 16:32:03,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237838179] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:32:03,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:32:03,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-18 16:32:03,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364433182] [2023-02-18 16:32:03,572 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:32:03,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 16:32:03,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:32:03,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 16:32:03,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2023-02-18 16:32:03,573 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 16:32:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:32:04,182 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2023-02-18 16:32:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 16:32:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 118 [2023-02-18 16:32:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:32:04,183 INFO L225 Difference]: With dead ends: 79 [2023-02-18 16:32:04,183 INFO L226 Difference]: Without dead ends: 74 [2023-02-18 16:32:04,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-02-18 16:32:04,185 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:32:04,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 439 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 16:32:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-18 16:32:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-02-18 16:32:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 16:32:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2023-02-18 16:32:04,203 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 118 [2023-02-18 16:32:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:32:04,204 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2023-02-18 16:32:04,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 16:32:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2023-02-18 16:32:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-18 16:32:04,205 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:32:04,205 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1] [2023-02-18 16:32:04,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 16:32:04,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 16:32:04,412 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:32:04,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:32:04,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1159969796, now seen corresponding path program 16 times [2023-02-18 16:32:04,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:32:04,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388906387] [2023-02-18 16:32:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:32:04,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:32:04,419 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:32:04,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504733365] [2023-02-18 16:32:04,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:32:04,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:32:04,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:32:04,421 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:32:04,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 16:32:04,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:32:04,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:32:04,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-18 16:32:04,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:32:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 42 proven. 448 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-18 16:32:04,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:32:05,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:32:05,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388906387] [2023-02-18 16:32:05,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:32:05,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504733365] [2023-02-18 16:32:05,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504733365] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:32:05,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:32:05,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-02-18 16:32:05,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650387628] [2023-02-18 16:32:05,057 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:32:05,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 16:32:05,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:32:05,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 16:32:05,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2023-02-18 16:32:05,059 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 16:32:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:32:05,729 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2023-02-18 16:32:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 16:32:05,729 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 125 [2023-02-18 16:32:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:32:05,730 INFO L225 Difference]: With dead ends: 82 [2023-02-18 16:32:05,730 INFO L226 Difference]: Without dead ends: 77 [2023-02-18 16:32:05,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2023-02-18 16:32:05,731 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:32:05,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 482 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 16:32:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-18 16:32:05,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-02-18 16:32:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-18 16:32:05,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2023-02-18 16:32:05,744 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 125 [2023-02-18 16:32:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:32:05,744 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2023-02-18 16:32:05,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 16:32:05,745 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2023-02-18 16:32:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-02-18 16:32:05,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:32:05,746 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1] [2023-02-18 16:32:05,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 16:32:05,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:32:05,947 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:32:05,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:32:05,947 INFO L85 PathProgramCache]: Analyzing trace with hash -633523594, now seen corresponding path program 17 times [2023-02-18 16:32:05,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:32:05,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833898593] [2023-02-18 16:32:05,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:32:05,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:32:05,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:32:05,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645287760] [2023-02-18 16:32:05,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:32:05,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:32:05,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:32:05,955 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:32:05,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 16:32:11,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-02-18 16:32:11,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:32:11,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-18 16:32:11,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:32:14,037 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 1 10))) (and (= |c_ULTIMATE.start_main_~y~0#1| (+ 1 .cse0)) (= (+ |c_ULTIMATE.start_main_~c~0#1| (- 1)) .cse0) (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0))) is different from true [2023-02-18 16:32:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 71 proven. 458 refuted. 0 times theorem prover too weak. 561 trivial. 17 not checked. [2023-02-18 16:32:14,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:32:14,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:32:14,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833898593] [2023-02-18 16:32:14,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:32:14,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645287760] [2023-02-18 16:32:14,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645287760] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:32:14,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:32:14,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-18 16:32:14,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263314394] [2023-02-18 16:32:14,303 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:32:14,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 16:32:14,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:32:14,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 16:32:14,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=733, Unknown=1, NotChecked=54, Total=870 [2023-02-18 16:32:14,305 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-18 16:32:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:32:15,021 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2023-02-18 16:32:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 16:32:15,021 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 132 [2023-02-18 16:32:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:32:15,022 INFO L225 Difference]: With dead ends: 85 [2023-02-18 16:32:15,022 INFO L226 Difference]: Without dead ends: 80 [2023-02-18 16:32:15,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=101, Invalid=894, Unknown=1, NotChecked=60, Total=1056 [2023-02-18 16:32:15,023 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:32:15,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 527 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1377 Invalid, 0 Unknown, 82 Unchecked, 0.6s Time] [2023-02-18 16:32:15,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-18 16:32:15,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-02-18 16:32:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 16:32:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2023-02-18 16:32:15,036 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 132 [2023-02-18 16:32:15,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:32:15,037 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2023-02-18 16:32:15,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-18 16:32:15,037 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2023-02-18 16:32:15,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-02-18 16:32:15,038 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:32:15,038 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1] [2023-02-18 16:32:15,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 16:32:15,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:32:15,241 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:32:15,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:32:15,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2015107396, now seen corresponding path program 18 times [2023-02-18 16:32:15,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:32:15,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644971160] [2023-02-18 16:32:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:32:15,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:32:15,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:32:15,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638000132] [2023-02-18 16:32:15,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:32:15,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:32:15,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:32:15,250 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:32:15,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 16:32:15,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-02-18 16:32:15,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:32:15,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 89 conjunts are in the unsatisfiable core [2023-02-18 16:32:15,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:32:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 58 proven. 547 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2023-02-18 16:32:17,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:32:20,138 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |c_ULTIMATE.start_main_~c~0#1|)))))))))))) (or (= 0 (let ((.cse0 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))))))))))))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ .cse1 1) |ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |ULTIMATE.start_main_~k~0#1|)))))) is different from false [2023-02-18 16:32:20,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:32:20,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644971160] [2023-02-18 16:32:20,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:32:20,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638000132] [2023-02-18 16:32:20,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638000132] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:32:20,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:32:20,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-18 16:32:20,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036428236] [2023-02-18 16:32:20,140 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:32:20,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 16:32:20,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:32:20,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 16:32:20,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1277, Unknown=1, NotChecked=76, Total=1640 [2023-02-18 16:32:20,141 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 16:32:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:32:21,033 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2023-02-18 16:32:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 16:32:21,034 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 139 [2023-02-18 16:32:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:32:21,034 INFO L225 Difference]: With dead ends: 88 [2023-02-18 16:32:21,034 INFO L226 Difference]: Without dead ends: 83 [2023-02-18 16:32:21,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=305, Invalid=1504, Unknown=1, NotChecked=82, Total=1892 [2023-02-18 16:32:21,035 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:32:21,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 552 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:32:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-18 16:32:21,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-02-18 16:32:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 21 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 16:32:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2023-02-18 16:32:21,053 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 139 [2023-02-18 16:32:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:32:21,053 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2023-02-18 16:32:21,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 16:32:21,054 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2023-02-18 16:32:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-02-18 16:32:21,055 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:32:21,055 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1] [2023-02-18 16:32:21,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 16:32:21,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:32:21,262 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:32:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:32:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash 245168054, now seen corresponding path program 19 times [2023-02-18 16:32:21,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:32:21,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607298853] [2023-02-18 16:32:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:32:21,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:32:21,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:32:21,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684844969] [2023-02-18 16:32:21,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:32:21,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:32:21,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:32:21,270 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:32:21,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 16:32:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:32:59,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-18 16:32:59,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:33:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 96 proven. 571 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-02-18 16:33:01,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:33:26,705 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_77| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_77| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261|)))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261|)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 16:33:32,717 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_77| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_77| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261|)))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_261|)) 4) 0))) (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 16:33:37,298 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 16:33:37,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:33:37,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607298853] [2023-02-18 16:33:37,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:33:37,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684844969] [2023-02-18 16:33:37,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684844969] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:33:37,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:33:37,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-18 16:33:37,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090967764] [2023-02-18 16:33:37,303 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:33:37,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 16:33:37,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:33:37,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 16:33:37,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=12, NotChecked=180, Total=1122 [2023-02-18 16:33:37,304 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 16:33:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:33:38,137 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2023-02-18 16:33:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 16:33:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 146 [2023-02-18 16:33:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:33:38,138 INFO L225 Difference]: With dead ends: 91 [2023-02-18 16:33:38,138 INFO L226 Difference]: Without dead ends: 86 [2023-02-18 16:33:38,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=98, Invalid=1024, Unknown=12, NotChecked=198, Total=1332 [2023-02-18 16:33:38,139 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:33:38,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 600 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:33:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-18 16:33:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-02-18 16:33:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 22 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 16:33:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2023-02-18 16:33:38,153 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 146 [2023-02-18 16:33:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:33:38,154 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2023-02-18 16:33:38,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 16:33:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2023-02-18 16:33:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-02-18 16:33:38,157 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:33:38,157 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1] [2023-02-18 16:33:38,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-18 16:33:38,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:33:38,367 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:33:38,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:33:38,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1166558852, now seen corresponding path program 20 times [2023-02-18 16:33:38,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:33:38,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313111908] [2023-02-18 16:33:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:33:38,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:33:38,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:33:38,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465586931] [2023-02-18 16:33:38,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:33:38,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:33:38,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:33:38,377 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:33:38,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 16:33:38,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:33:38,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:33:38,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-18 16:33:38,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:33:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 98 proven. 634 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2023-02-18 16:33:39,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:33:41,194 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 16:33:41,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:33:41,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313111908] [2023-02-18 16:33:41,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:33:41,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465586931] [2023-02-18 16:33:41,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465586931] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:33:41,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:33:41,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-02-18 16:33:41,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666213418] [2023-02-18 16:33:41,198 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:33:41,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 16:33:41,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:33:41,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 16:33:41,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=904, Unknown=1, NotChecked=60, Total=1056 [2023-02-18 16:33:41,199 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 16:33:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:33:42,077 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2023-02-18 16:33:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 16:33:42,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 153 [2023-02-18 16:33:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:33:42,078 INFO L225 Difference]: With dead ends: 94 [2023-02-18 16:33:42,078 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 16:33:42,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=110, Invalid=1083, Unknown=1, NotChecked=66, Total=1260 [2023-02-18 16:33:42,079 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:33:42,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 650 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:33:42,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 16:33:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 16:33:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 23 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 16:33:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2023-02-18 16:33:42,094 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 153 [2023-02-18 16:33:42,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:33:42,095 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2023-02-18 16:33:42,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 16:33:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2023-02-18 16:33:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-02-18 16:33:42,096 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:33:42,096 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1] [2023-02-18 16:33:42,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-18 16:33:42,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:33:42,303 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:33:42,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:33:42,303 INFO L85 PathProgramCache]: Analyzing trace with hash 5934326, now seen corresponding path program 21 times [2023-02-18 16:33:42,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:33:42,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239946654] [2023-02-18 16:33:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:33:42,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:33:42,313 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:33:42,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772923538] [2023-02-18 16:33:42,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:33:42,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:33:42,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:33:42,321 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:33:42,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 16:33:43,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-02-18 16:33:43,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:33:43,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 100 conjunts are in the unsatisfiable core [2023-02-18 16:33:43,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:33:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 79 proven. 721 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-02-18 16:33:43,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:33:43,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:33:43,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239946654] [2023-02-18 16:33:43,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:33:43,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772923538] [2023-02-18 16:33:43,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772923538] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:33:43,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:33:43,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-02-18 16:33:43,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252576485] [2023-02-18 16:33:43,774 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:33:43,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 16:33:43,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:33:43,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 16:33:43,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 16:33:43,775 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 16:33:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:33:44,682 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2023-02-18 16:33:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 16:33:44,683 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 160 [2023-02-18 16:33:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:33:44,684 INFO L225 Difference]: With dead ends: 97 [2023-02-18 16:33:44,684 INFO L226 Difference]: Without dead ends: 92 [2023-02-18 16:33:44,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 16:33:44,685 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:33:44,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 727 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 16:33:44,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-18 16:33:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-02-18 16:33:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 24 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-18 16:33:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2023-02-18 16:33:44,703 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 160 [2023-02-18 16:33:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:33:44,703 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2023-02-18 16:33:44,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 16:33:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2023-02-18 16:33:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-02-18 16:33:44,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:33:44,705 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1] [2023-02-18 16:33:44,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 16:33:44,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:33:44,912 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:33:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:33:44,913 INFO L85 PathProgramCache]: Analyzing trace with hash -779895748, now seen corresponding path program 22 times [2023-02-18 16:33:44,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:33:44,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129252195] [2023-02-18 16:33:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:33:44,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:33:44,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:33:44,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090356967] [2023-02-18 16:33:44,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:33:44,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:33:44,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:33:44,920 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:33:44,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 16:33:45,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:33:45,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:33:45,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-18 16:33:45,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:33:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 45 proven. 826 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-02-18 16:33:46,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:33:46,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:33:46,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129252195] [2023-02-18 16:33:46,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:33:46,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090356967] [2023-02-18 16:33:46,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090356967] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:33:46,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:33:46,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-02-18 16:33:46,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073419262] [2023-02-18 16:33:46,368 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:33:46,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 16:33:46,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:33:46,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 16:33:46,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 16:33:46,369 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-18 16:33:47,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:33:47,359 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2023-02-18 16:33:47,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 16:33:47,360 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 167 [2023-02-18 16:33:47,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:33:47,361 INFO L225 Difference]: With dead ends: 100 [2023-02-18 16:33:47,361 INFO L226 Difference]: Without dead ends: 95 [2023-02-18 16:33:47,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 16:33:47,361 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 16:33:47,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 756 Invalid, 2051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 16:33:47,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-18 16:33:47,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-02-18 16:33:47,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 16:33:47,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2023-02-18 16:33:47,380 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 167 [2023-02-18 16:33:47,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:33:47,381 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2023-02-18 16:33:47,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-18 16:33:47,381 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2023-02-18 16:33:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-02-18 16:33:47,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:33:47,382 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1] [2023-02-18 16:33:47,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 16:33:47,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-18 16:33:47,589 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:33:47,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:33:47,589 INFO L85 PathProgramCache]: Analyzing trace with hash -821431754, now seen corresponding path program 23 times [2023-02-18 16:33:47,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:33:47,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373262107] [2023-02-18 16:33:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:33:47,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:33:47,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:33:47,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929361528] [2023-02-18 16:33:47,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:33:47,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:33:47,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:33:47,598 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:33:47,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 16:34:21,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-02-18 16:34:21,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:34:21,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 108 conjunts are in the unsatisfiable core [2023-02-18 16:34:21,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:34:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 83 proven. 862 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2023-02-18 16:34:22,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:34:22,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:34:22,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373262107] [2023-02-18 16:34:22,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:34:22,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929361528] [2023-02-18 16:34:22,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929361528] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:34:22,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:34:22,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-02-18 16:34:22,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410873314] [2023-02-18 16:34:22,331 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:34:22,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 16:34:22,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:34:22,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 16:34:22,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 16:34:22,333 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 16:34:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:34:23,382 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2023-02-18 16:34:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 16:34:23,383 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 174 [2023-02-18 16:34:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:34:23,383 INFO L225 Difference]: With dead ends: 103 [2023-02-18 16:34:23,384 INFO L226 Difference]: Without dead ends: 98 [2023-02-18 16:34:23,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 16:34:23,385 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 7 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:34:23,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 812 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 16:34:23,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-18 16:34:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-02-18 16:34:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 26 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-18 16:34:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2023-02-18 16:34:23,402 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 174 [2023-02-18 16:34:23,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:34:23,402 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2023-02-18 16:34:23,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 16:34:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2023-02-18 16:34:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-02-18 16:34:23,404 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:34:23,404 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1] [2023-02-18 16:34:23,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-18 16:34:23,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 16:34:23,605 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:34:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:34:23,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1091309828, now seen corresponding path program 24 times [2023-02-18 16:34:23,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:34:23,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001110346] [2023-02-18 16:34:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:34:23,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:34:23,612 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:34:23,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476185458] [2023-02-18 16:34:23,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:34:23,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:34:23,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:34:23,614 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:34:23,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 16:34:24,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2023-02-18 16:34:24,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:34:24,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 112 conjunts are in the unsatisfiable core [2023-02-18 16:34:24,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:34:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 112 proven. 910 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2023-02-18 16:34:25,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:34:25,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:34:25,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001110346] [2023-02-18 16:34:25,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:34:25,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476185458] [2023-02-18 16:34:25,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476185458] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:34:25,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:34:25,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-02-18 16:34:25,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30680611] [2023-02-18 16:34:25,369 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:34:25,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 16:34:25,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:34:25,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 16:34:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 16:34:25,370 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-18 16:34:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:34:26,569 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2023-02-18 16:34:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 16:34:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 181 [2023-02-18 16:34:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:34:26,571 INFO L225 Difference]: With dead ends: 106 [2023-02-18 16:34:26,571 INFO L226 Difference]: Without dead ends: 101 [2023-02-18 16:34:26,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 16:34:26,571 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:34:26,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 870 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 16:34:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-18 16:34:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-18 16:34:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 27 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-02-18 16:34:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2023-02-18 16:34:26,596 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 181 [2023-02-18 16:34:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:34:26,597 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2023-02-18 16:34:26,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-18 16:34:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2023-02-18 16:34:26,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-02-18 16:34:26,598 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:34:26,598 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1] [2023-02-18 16:34:26,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 16:34:26,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 16:34:26,806 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:34:26,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:34:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash -952162442, now seen corresponding path program 25 times [2023-02-18 16:34:26,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:34:26,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694501903] [2023-02-18 16:34:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:34:26,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:34:26,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:34:26,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688036842] [2023-02-18 16:34:26,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:34:26,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:34:26,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:34:26,831 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:34:26,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 16:34:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:34:27,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 116 conjunts are in the unsatisfiable core [2023-02-18 16:34:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:34:29,637 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 1 23))) (let ((.cse1 (+ 1 .cse0))) (and (< .cse0 |c_ULTIMATE.start_main_~k~0#1|) (= |c_ULTIMATE.start_main_~y~0#1| .cse1) (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0) (<= |c_ULTIMATE.start_main_~c~0#1| .cse1)))) is different from true [2023-02-18 16:34:29,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 126 proven. 951 refuted. 0 times theorem prover too weak. 1225 trivial. 25 not checked. [2023-02-18 16:34:29,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:34:31,790 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (= 0 (+ (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~y~0#1|) (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))))) is different from false [2023-02-18 16:34:35,813 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_95| Int)) (or (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414|)) 4) 0) (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_95| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414|))))))) is different from true [2023-02-18 16:34:41,826 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_95| Int)) (or (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414|)) 4) 0) (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_95| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_414|))))))) is different from true [2023-02-18 16:34:45,838 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 16:34:45,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:34:45,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694501903] [2023-02-18 16:34:45,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:34:45,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688036842] [2023-02-18 16:34:45,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688036842] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:34:45,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:34:45,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2023-02-18 16:34:45,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134224233] [2023-02-18 16:34:45,842 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:34:45,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 16:34:45,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:34:45,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 16:34:45,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1188, Unknown=5, NotChecked=360, Total=1640 [2023-02-18 16:34:45,843 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 27 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-02-18 16:34:47,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:34:50,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:34:52,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:34:54,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:34:56,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:34:58,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:35:00,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:35:02,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:35:04,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:35:06,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:35:09,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:35:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:35:09,034 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2023-02-18 16:35:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 16:35:09,035 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 27 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 188 [2023-02-18 16:35:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:35:09,035 INFO L225 Difference]: With dead ends: 109 [2023-02-18 16:35:09,036 INFO L226 Difference]: Without dead ends: 104 [2023-02-18 16:35:09,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=100, Invalid=1321, Unknown=5, NotChecked=380, Total=1806 [2023-02-18 16:35:09,036 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 5 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 0 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:35:09,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 959 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2558 Invalid, 11 Unknown, 116 Unchecked, 23.1s Time] [2023-02-18 16:35:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-18 16:35:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-02-18 16:35:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 28 states have call successors, (28), 5 states have call predecessors, (28), 4 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-18 16:35:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2023-02-18 16:35:09,057 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 188 [2023-02-18 16:35:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:35:09,057 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2023-02-18 16:35:09,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 27 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-02-18 16:35:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2023-02-18 16:35:09,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-02-18 16:35:09,058 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:35:09,058 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1] [2023-02-18 16:35:09,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-18 16:35:09,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-18 16:35:09,259 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:35:09,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:35:09,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1481354820, now seen corresponding path program 26 times [2023-02-18 16:35:09,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:35:09,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088939923] [2023-02-18 16:35:09,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:35:09,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:35:09,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:35:09,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012067518] [2023-02-18 16:35:09,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:35:09,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:35:09,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:35:09,268 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:35:09,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-18 16:35:09,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:35:09,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:35:09,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 120 conjunts are in the unsatisfiable core [2023-02-18 16:35:09,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:35:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 128 proven. 1057 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2023-02-18 16:35:10,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:35:12,448 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 16:35:12,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:35:12,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088939923] [2023-02-18 16:35:12,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:35:12,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012067518] [2023-02-18 16:35:12,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012067518] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:35:12,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:35:12,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2023-02-18 16:35:12,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978137069] [2023-02-18 16:35:12,450 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:35:12,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 16:35:12,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:35:12,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 16:35:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1300, Unknown=1, NotChecked=72, Total=1482 [2023-02-18 16:35:12,451 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-18 16:35:13,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:35:13,779 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2023-02-18 16:35:13,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 16:35:13,779 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 195 [2023-02-18 16:35:13,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:35:13,780 INFO L225 Difference]: With dead ends: 112 [2023-02-18 16:35:13,780 INFO L226 Difference]: Without dead ends: 107 [2023-02-18 16:35:13,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=128, Invalid=1515, Unknown=1, NotChecked=78, Total=1722 [2023-02-18 16:35:13,781 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 6 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 2813 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:35:13,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1022 Invalid, 2813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2813 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 16:35:13,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-18 16:35:13,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-02-18 16:35:13,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 29 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-02-18 16:35:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2023-02-18 16:35:13,802 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 195 [2023-02-18 16:35:13,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:35:13,802 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2023-02-18 16:35:13,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-18 16:35:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2023-02-18 16:35:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-02-18 16:35:13,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:35:13,803 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1] [2023-02-18 16:35:13,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-18 16:35:14,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 16:35:14,004 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:35:14,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:35:14,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1567740746, now seen corresponding path program 27 times [2023-02-18 16:35:14,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:35:14,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398531719] [2023-02-18 16:35:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:35:14,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:35:14,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:35:14,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594052025] [2023-02-18 16:35:14,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:35:14,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:35:14,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:35:14,012 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:35:14,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-18 16:35:15,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2023-02-18 16:35:15,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:35:15,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 125 conjunts are in the unsatisfiable core [2023-02-18 16:35:15,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:35:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 109 proven. 1162 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2023-02-18 16:35:15,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:35:16,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:35:16,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398531719] [2023-02-18 16:35:16,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:35:16,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594052025] [2023-02-18 16:35:16,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594052025] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:35:16,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:35:16,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2023-02-18 16:35:16,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492007276] [2023-02-18 16:35:16,013 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:35:16,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 16:35:16,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:35:16,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 16:35:16,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 16:35:16,014 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 35 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-02-18 16:35:17,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:35:17,407 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2023-02-18 16:35:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 16:35:17,408 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 202 [2023-02-18 16:35:17,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:35:17,408 INFO L225 Difference]: With dead ends: 115 [2023-02-18 16:35:17,408 INFO L226 Difference]: Without dead ends: 110 [2023-02-18 16:35:17,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=1591, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 16:35:17,409 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 7 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 2911 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:35:17,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1056 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2911 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-18 16:35:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-18 16:35:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-02-18 16:35:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 30 states have call successors, (30), 5 states have call predecessors, (30), 4 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-02-18 16:35:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 135 transitions. [2023-02-18 16:35:17,429 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 135 transitions. Word has length 202 [2023-02-18 16:35:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:35:17,429 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 135 transitions. [2023-02-18 16:35:17,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-02-18 16:35:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 135 transitions. [2023-02-18 16:35:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-02-18 16:35:17,430 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:35:17,430 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1] [2023-02-18 16:35:17,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-18 16:35:17,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:35:17,639 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:35:17,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:35:17,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1548688260, now seen corresponding path program 28 times [2023-02-18 16:35:17,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:35:17,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593275900] [2023-02-18 16:35:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:35:17,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:35:17,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:35:17,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538104285] [2023-02-18 16:35:17,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:35:17,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:35:17,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:35:17,647 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:35:17,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-18 16:35:19,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:35:19,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:35:19,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 128 conjunts are in the unsatisfiable core [2023-02-18 16:35:19,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:35:21,193 WARN L859 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~y~0#1| 0) (= |c_ULTIMATE.start_main_~c~0#1| 0) (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) is different from true [2023-02-18 16:35:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 57 proven. 1275 refuted. 0 times theorem prover too weak. 1540 trivial. 28 not checked. [2023-02-18 16:35:21,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:35:21,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:35:21,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593275900] [2023-02-18 16:35:21,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:35:21,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538104285] [2023-02-18 16:35:21,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538104285] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:35:21,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:35:21,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2023-02-18 16:35:21,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496502898] [2023-02-18 16:35:21,845 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:35:21,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 16:35:21,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:35:21,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 16:35:21,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1448, Unknown=1, NotChecked=76, Total=1640 [2023-02-18 16:35:21,846 INFO L87 Difference]: Start difference. First operand 110 states and 135 transitions. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-02-18 16:35:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:35:23,302 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2023-02-18 16:35:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 16:35:23,303 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 209 [2023-02-18 16:35:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:35:23,303 INFO L225 Difference]: With dead ends: 118 [2023-02-18 16:35:23,304 INFO L226 Difference]: Without dead ends: 113 [2023-02-18 16:35:23,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=134, Invalid=1675, Unknown=1, NotChecked=82, Total=1892 [2023-02-18 16:35:23,304 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 3068 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 3195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:35:23,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1122 Invalid, 3195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3068 Invalid, 0 Unknown, 127 Unchecked, 1.4s Time] [2023-02-18 16:35:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-18 16:35:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-02-18 16:35:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 31 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-18 16:35:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 139 transitions. [2023-02-18 16:35:23,325 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 139 transitions. Word has length 209 [2023-02-18 16:35:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:35:23,325 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 139 transitions. [2023-02-18 16:35:23,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-02-18 16:35:23,325 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 139 transitions. [2023-02-18 16:35:23,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-02-18 16:35:23,326 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:35:23,326 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1] [2023-02-18 16:35:23,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-18 16:35:23,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:35:23,529 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:35:23,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:35:23,529 INFO L85 PathProgramCache]: Analyzing trace with hash -947191306, now seen corresponding path program 29 times [2023-02-18 16:35:23,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:35:23,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234969835] [2023-02-18 16:35:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:35:23,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:35:23,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:35:23,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237436852] [2023-02-18 16:35:23,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:35:23,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:35:23,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:35:23,539 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:35:23,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-18 16:35:31,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2023-02-18 16:35:31,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:35:31,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 132 conjunts are in the unsatisfiable core [2023-02-18 16:35:31,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:35:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 125 proven. 1327 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2023-02-18 16:35:32,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:35:32,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:35:32,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234969835] [2023-02-18 16:35:32,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:35:32,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237436852] [2023-02-18 16:35:32,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237436852] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:35:32,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:35:32,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2023-02-18 16:35:32,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280487845] [2023-02-18 16:35:32,347 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:35:32,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 16:35:32,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:35:32,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 16:35:32,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 16:35:32,348 INFO L87 Difference]: Start difference. First operand 113 states and 139 transitions. Second operand has 37 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 31 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-18 16:35:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:35:33,914 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2023-02-18 16:35:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 16:35:33,914 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 31 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 216 [2023-02-18 16:35:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:35:33,915 INFO L225 Difference]: With dead ends: 121 [2023-02-18 16:35:33,915 INFO L226 Difference]: Without dead ends: 116 [2023-02-18 16:35:33,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 16:35:33,916 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 6 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 3392 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 3392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:35:33,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1223 Invalid, 3392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3392 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 16:35:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-18 16:35:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-02-18 16:35:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-18 16:35:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2023-02-18 16:35:33,943 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 216 [2023-02-18 16:35:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:35:33,943 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2023-02-18 16:35:33,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 31 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-18 16:35:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2023-02-18 16:35:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-02-18 16:35:33,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:35:33,945 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1] [2023-02-18 16:35:33,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-18 16:35:34,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:35:34,153 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:35:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:35:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash 2111153980, now seen corresponding path program 30 times [2023-02-18 16:35:34,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:35:34,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633074721] [2023-02-18 16:35:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:35:34,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:35:34,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:35:34,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488441538] [2023-02-18 16:35:34,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:35:34,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:35:34,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:35:34,161 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:35:34,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-18 16:36:21,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2023-02-18 16:36:21,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:36:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 136 conjunts are in the unsatisfiable core [2023-02-18 16:36:21,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:36:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 139 proven. 1408 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-02-18 16:36:21,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:36:22,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:36:22,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633074721] [2023-02-18 16:36:22,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:36:22,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488441538] [2023-02-18 16:36:22,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488441538] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:36:22,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:36:22,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2023-02-18 16:36:22,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292695891] [2023-02-18 16:36:22,141 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:36:22,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 16:36:22,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:36:22,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 16:36:22,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 16:36:22,143 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 38 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 32 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-18 16:36:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:36:23,780 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2023-02-18 16:36:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 16:36:23,781 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 32 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 223 [2023-02-18 16:36:23,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:36:23,782 INFO L225 Difference]: With dead ends: 124 [2023-02-18 16:36:23,782 INFO L226 Difference]: Without dead ends: 119 [2023-02-18 16:36:23,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=1842, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 16:36:23,782 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 7 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 3499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 3499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:36:23,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1260 Invalid, 3499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3499 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 16:36:23,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-18 16:36:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-02-18 16:36:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 33 states have call successors, (33), 5 states have call predecessors, (33), 4 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-02-18 16:36:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 147 transitions. [2023-02-18 16:36:23,806 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 147 transitions. Word has length 223 [2023-02-18 16:36:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:36:23,807 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 147 transitions. [2023-02-18 16:36:23,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 32 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-18 16:36:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 147 transitions. [2023-02-18 16:36:23,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-02-18 16:36:23,808 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:36:23,808 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1] [2023-02-18 16:36:23,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-18 16:36:24,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-18 16:36:24,025 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:36:24,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:36:24,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1983273162, now seen corresponding path program 31 times [2023-02-18 16:36:24,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:36:24,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049984640] [2023-02-18 16:36:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:36:24,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:36:24,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:36:24,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567142730] [2023-02-18 16:36:24,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:36:24,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:36:24,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:36:24,034 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:36:24,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-18 16:36:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:36:26,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 140 conjunts are in the unsatisfiable core [2023-02-18 16:36:26,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:36:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 156 proven. 1489 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2023-02-18 16:36:26,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:36:28,778 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (= 0 (+ (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~y~0#1|) (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))))) is different from false [2023-02-18 16:36:32,792 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_113| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603|)))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603|)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 16:36:38,803 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_113| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603|)))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_603|)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 16:36:42,813 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)))) (not (= (mod (+ (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0))) is different from false [2023-02-18 16:36:42,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:36:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049984640] [2023-02-18 16:36:42,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:36:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567142730] [2023-02-18 16:36:42,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567142730] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:36:42,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:36:42,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2023-02-18 16:36:42,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350292734] [2023-02-18 16:36:42,817 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:36:42,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 16:36:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:36:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 16:36:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1637, Unknown=4, NotChecked=332, Total=2070 [2023-02-18 16:36:42,818 INFO L87 Difference]: Start difference. First operand 119 states and 147 transitions. Second operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 33 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-02-18 16:36:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:36:44,557 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2023-02-18 16:36:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 16:36:44,558 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 33 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 230 [2023-02-18 16:36:44,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:36:44,559 INFO L225 Difference]: With dead ends: 127 [2023-02-18 16:36:44,559 INFO L226 Difference]: Without dead ends: 122 [2023-02-18 16:36:44,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=116, Invalid=1876, Unknown=4, NotChecked=356, Total=2352 [2023-02-18 16:36:44,560 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 6 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 3808 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 3808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:36:44,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1367 Invalid, 3808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3808 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-18 16:36:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-18 16:36:44,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-02-18 16:36:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 34 states have call successors, (34), 5 states have call predecessors, (34), 4 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 16:36:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 151 transitions. [2023-02-18 16:36:44,590 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 151 transitions. Word has length 230 [2023-02-18 16:36:44,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:36:44,590 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 151 transitions. [2023-02-18 16:36:44,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 33 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-02-18 16:36:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 151 transitions. [2023-02-18 16:36:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-02-18 16:36:44,592 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:36:44,592 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1] [2023-02-18 16:36:44,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-18 16:36:44,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:36:44,801 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:36:44,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:36:44,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1947113980, now seen corresponding path program 32 times [2023-02-18 16:36:44,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:36:44,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883784692] [2023-02-18 16:36:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:36:44,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:36:44,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:36:44,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320470109] [2023-02-18 16:36:44,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:36:44,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:36:44,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:36:44,813 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:36:44,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-18 16:36:45,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:36:45,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:36:45,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 144 conjunts are in the unsatisfiable core [2023-02-18 16:36:45,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:36:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 158 proven. 1588 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2023-02-18 16:36:45,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:36:48,105 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 16:36:48,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:36:48,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883784692] [2023-02-18 16:36:48,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:36:48,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320470109] [2023-02-18 16:36:48,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320470109] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:36:48,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:36:48,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2023-02-18 16:36:48,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727858775] [2023-02-18 16:36:48,107 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:36:48,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 16:36:48,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:36:48,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 16:36:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1768, Unknown=1, NotChecked=84, Total=1980 [2023-02-18 16:36:48,108 INFO L87 Difference]: Start difference. First operand 122 states and 151 transitions. Second operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 16:36:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:36:49,932 INFO L93 Difference]: Finished difference Result 130 states and 160 transitions. [2023-02-18 16:36:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-18 16:36:49,933 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 237 [2023-02-18 16:36:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:36:49,934 INFO L225 Difference]: With dead ends: 130 [2023-02-18 16:36:49,934 INFO L226 Difference]: Without dead ends: 125 [2023-02-18 16:36:49,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=146, Invalid=2019, Unknown=1, NotChecked=90, Total=2256 [2023-02-18 16:36:49,934 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 6 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 4025 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 4025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:36:49,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1442 Invalid, 4025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4025 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-18 16:36:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-18 16:36:49,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-02-18 16:36:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 35 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-18 16:36:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2023-02-18 16:36:49,960 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 237 [2023-02-18 16:36:49,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:36:49,960 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2023-02-18 16:36:49,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 16:36:49,960 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2023-02-18 16:36:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-02-18 16:36:49,963 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:36:49,964 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1] [2023-02-18 16:36:49,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-18 16:36:50,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-18 16:36:50,164 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:36:50,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:36:50,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1776163958, now seen corresponding path program 33 times [2023-02-18 16:36:50,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:36:50,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398768672] [2023-02-18 16:36:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:36:50,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:36:50,178 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:36:50,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854331842] [2023-02-18 16:36:50,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:36:50,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:36:50,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:36:50,180 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:36:50,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-18 16:36:52,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2023-02-18 16:36:52,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:36:52,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 148 conjunts are in the unsatisfiable core [2023-02-18 16:36:52,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:36:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 139 proven. 1711 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2023-02-18 16:36:54,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:36:54,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:36:54,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398768672] [2023-02-18 16:36:54,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:36:54,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854331842] [2023-02-18 16:36:54,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854331842] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:36:54,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:36:54,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2023-02-18 16:36:54,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528484048] [2023-02-18 16:36:54,733 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:36:54,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 16:36:54,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:36:54,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 16:36:54,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 16:36:54,735 INFO L87 Difference]: Start difference. First operand 125 states and 155 transitions. Second operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 35 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-18 16:36:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:36:56,624 INFO L93 Difference]: Finished difference Result 133 states and 164 transitions. [2023-02-18 16:36:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 16:36:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 35 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 244 [2023-02-18 16:36:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:36:56,625 INFO L225 Difference]: With dead ends: 133 [2023-02-18 16:36:56,625 INFO L226 Difference]: Without dead ends: 128 [2023-02-18 16:36:56,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=147, Invalid=2109, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 16:36:56,626 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 7 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 4141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 4141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:36:56,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1482 Invalid, 4141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4141 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-18 16:36:56,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-18 16:36:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-02-18 16:36:56,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 36 states have call successors, (36), 5 states have call predecessors, (36), 4 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-02-18 16:36:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 159 transitions. [2023-02-18 16:36:56,661 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 159 transitions. Word has length 244 [2023-02-18 16:36:56,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:36:56,661 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 159 transitions. [2023-02-18 16:36:56,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 35 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-18 16:36:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 159 transitions. [2023-02-18 16:36:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-02-18 16:36:56,663 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:36:56,663 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1] [2023-02-18 16:36:56,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-18 16:36:56,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:36:56,869 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:36:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:36:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash -146293572, now seen corresponding path program 34 times [2023-02-18 16:36:56,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:36:56,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558570095] [2023-02-18 16:36:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:36:56,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:36:56,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:36:56,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080208167] [2023-02-18 16:36:56,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:36:56,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:36:56,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:36:56,880 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:36:56,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-18 16:37:14,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:37:14,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:37:14,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 152 conjunts are in the unsatisfiable core [2023-02-18 16:37:14,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:37:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 69 proven. 1888 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2023-02-18 16:37:14,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:37:15,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:37:15,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558570095] [2023-02-18 16:37:15,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:37:15,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080208167] [2023-02-18 16:37:15,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080208167] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:37:15,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:37:15,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2023-02-18 16:37:15,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795308498] [2023-02-18 16:37:15,137 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:37:15,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-18 16:37:15,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:37:15,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-18 16:37:15,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 16:37:15,139 INFO L87 Difference]: Start difference. First operand 128 states and 159 transitions. Second operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-02-18 16:37:17,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:37:17,175 INFO L93 Difference]: Finished difference Result 136 states and 168 transitions. [2023-02-18 16:37:17,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-18 16:37:17,176 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Word has length 251 [2023-02-18 16:37:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:37:17,177 INFO L225 Difference]: With dead ends: 136 [2023-02-18 16:37:17,177 INFO L226 Difference]: Without dead ends: 131 [2023-02-18 16:37:17,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=2202, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 16:37:17,177 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 6 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 4477 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 4477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-18 16:37:17,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1598 Invalid, 4477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4477 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-18 16:37:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-18 16:37:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-02-18 16:37:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 37 states have call successors, (37), 5 states have call predecessors, (37), 4 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-02-18 16:37:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2023-02-18 16:37:17,212 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 251 [2023-02-18 16:37:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:37:17,212 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2023-02-18 16:37:17,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-02-18 16:37:17,213 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2023-02-18 16:37:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-02-18 16:37:17,214 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:37:17,214 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1] [2023-02-18 16:37:17,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-18 16:37:17,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-18 16:37:17,415 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:37:17,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:37:17,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1432117686, now seen corresponding path program 35 times [2023-02-18 16:37:17,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:37:17,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270728677] [2023-02-18 16:37:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:37:17,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:37:17,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:37:17,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592335398] [2023-02-18 16:37:17,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:37:17,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:37:17,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:37:17,427 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:37:17,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process