./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.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 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 07:07:00,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 07:07:00,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 07:07:00,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 07:07:00,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 07:07:00,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 07:07:00,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 07:07:00,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 07:07:00,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 07:07:00,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 07:07:00,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 07:07:00,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 07:07:00,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 07:07:00,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 07:07:00,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 07:07:00,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 07:07:00,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 07:07:00,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 07:07:00,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 07:07:00,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 07:07:00,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 07:07:00,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 07:07:00,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 07:07:00,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 07:07:00,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 07:07:00,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 07:07:00,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 07:07:00,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 07:07:00,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 07:07:00,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 07:07:00,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 07:07:00,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 07:07:00,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 07:07:00,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 07:07:00,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 07:07:00,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 07:07:00,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 07:07:00,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 07:07:00,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 07:07:00,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 07:07:00,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 07:07:00,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 07:07:00,386 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 07:07:00,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 07:07:00,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 07:07:00,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 07:07:00,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 07:07:00,388 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 07:07:00,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 07:07:00,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 07:07:00,388 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 07:07:00,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 07:07:00,389 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 07:07:00,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 07:07:00,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 07:07:00,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 07:07:00,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 07:07:00,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 07:07:00,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 07:07:00,390 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 07:07:00,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 07:07:00,390 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 07:07:00,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 07:07:00,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 07:07:00,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 07:07:00,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 07:07:00,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:07:00,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 07:07:00,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 07:07:00,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 07:07:00,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 07:07:00,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 07:07:00,392 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 07:07:00,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 07:07:00,393 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 07:07:00,393 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 07:07:00,393 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 07:07:00,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c [2023-02-17 07:07:00,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 07:07:00,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 07:07:00,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 07:07:00,644 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 07:07:00,644 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 07:07:00,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2023-02-17 07:07:01,736 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 07:07:01,854 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 07:07:01,854 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2023-02-17 07:07:01,858 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a96316d1d/7f7b350c4f384c35a2c587d4d5d7df9c/FLAGa4bfdfe46 [2023-02-17 07:07:01,868 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a96316d1d/7f7b350c4f384c35a2c587d4d5d7df9c [2023-02-17 07:07:01,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 07:07:01,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 07:07:01,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 07:07:01,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 07:07:01,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 07:07:01,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:07:01" (1/1) ... [2023-02-17 07:07:01,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2189d7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:01, skipping insertion in model container [2023-02-17 07:07:01,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:07:01" (1/1) ... [2023-02-17 07:07:01,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 07:07:01,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 07:07:02,001 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2023-02-17 07:07:02,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:07:02,044 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 07:07:02,051 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2023-02-17 07:07:02,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:07:02,070 INFO L208 MainTranslator]: Completed translation [2023-02-17 07:07:02,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02 WrapperNode [2023-02-17 07:07:02,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 07:07:02,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 07:07:02,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 07:07:02,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 07:07:02,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02" (1/1) ... [2023-02-17 07:07:02,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02" (1/1) ... [2023-02-17 07:07:02,101 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2023-02-17 07:07:02,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 07:07:02,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 07:07:02,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 07:07:02,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 07:07:02,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02" (1/1) ... [2023-02-17 07:07:02,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02" (1/1) ... [2023-02-17 07:07:02,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02" (1/1) ... [2023-02-17 07:07:02,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02" (1/1) ... [2023-02-17 07:07:02,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02" (1/1) ... [2023-02-17 07:07:02,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02" (1/1) ... [2023-02-17 07:07:02,131 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02" (1/1) ... [2023-02-17 07:07:02,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02" (1/1) ... [2023-02-17 07:07:02,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 07:07:02,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 07:07:02,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 07:07:02,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 07:07:02,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02" (1/1) ... [2023-02-17 07:07:02,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:07:02,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:02,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 07:07:02,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 07:07:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 07:07:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-17 07:07:02,223 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-17 07:07:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 07:07:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 07:07:02,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 07:07:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 07:07:02,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 07:07:02,269 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 07:07:02,270 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 07:07:02,435 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 07:07:02,444 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 07:07:02,449 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 07:07:02,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:07:02 BoogieIcfgContainer [2023-02-17 07:07:02,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 07:07:02,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 07:07:02,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 07:07:02,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 07:07:02,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:07:01" (1/3) ... [2023-02-17 07:07:02,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52430055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:07:02, skipping insertion in model container [2023-02-17 07:07:02,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:07:02" (2/3) ... [2023-02-17 07:07:02,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52430055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:07:02, skipping insertion in model container [2023-02-17 07:07:02,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:07:02" (3/3) ... [2023-02-17 07:07:02,464 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2023-02-17 07:07:02,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 07:07:02,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 07:07:02,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 07:07:02,520 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;@7135b5b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 07:07:02,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 07:07:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 07:07:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 07:07:02,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:02,528 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:02,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:02,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2023-02-17 07:07:02,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:02,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436764527] [2023-02-17 07:07:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:02,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:02,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:02,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436764527] [2023-02-17 07:07:02,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 07:07:02,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820960962] [2023-02-17 07:07:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:02,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:02,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:02,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:02,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 07:07:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 07:07:02,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 07:07:02,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:07:02,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820960962] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:07:02,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:07:02,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 07:07:02,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012631223] [2023-02-17 07:07:02,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:07:02,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 07:07:02,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:02,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 07:07:02,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:07:02,840 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 07:07:02,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:02,856 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2023-02-17 07:07:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 07:07:02,857 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-02-17 07:07:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:02,862 INFO L225 Difference]: With dead ends: 65 [2023-02-17 07:07:02,862 INFO L226 Difference]: Without dead ends: 30 [2023-02-17 07:07:02,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:07:02,866 INFO L413 NwaCegarLoop]: 45 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, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:02,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:07:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-17 07:07:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-17 07:07:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 07:07:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-02-17 07:07:02,891 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2023-02-17 07:07:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:02,891 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-02-17 07:07:02,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 07:07:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-02-17 07:07:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 07:07:02,893 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:02,893 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:02,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 07:07:03,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-17 07:07:03,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:03,099 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2023-02-17 07:07:03,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:03,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030292966] [2023-02-17 07:07:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:03,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:03,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:03,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390151567] [2023-02-17 07:07:03,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:03,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:03,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:03,112 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:03,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 07:07:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 07:07:03,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 07:07:03,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:07:03,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:03,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030292966] [2023-02-17 07:07:03,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:03,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390151567] [2023-02-17 07:07:03,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390151567] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:07:03,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:07:03,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 07:07:03,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105020229] [2023-02-17 07:07:03,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:07:03,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 07:07:03,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:03,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 07:07:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:07:03,223 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 07:07:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:03,248 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2023-02-17 07:07:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 07:07:03,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-02-17 07:07:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:03,250 INFO L225 Difference]: With dead ends: 40 [2023-02-17 07:07:03,250 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 07:07:03,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:07:03,251 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:03,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:07:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 07:07:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-17 07:07:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 07:07:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-02-17 07:07:03,257 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2023-02-17 07:07:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:03,258 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-02-17 07:07:03,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 07:07:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-02-17 07:07:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 07:07:03,259 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:03,259 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:03,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 07:07:03,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-17 07:07:03,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:03,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2023-02-17 07:07:03,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:03,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653079206] [2023-02-17 07:07:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:03,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:03,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:03,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924612272] [2023-02-17 07:07:03,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:03,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:03,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:03,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:03,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 07:07:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:03,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 07:07:03,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 07:07:03,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 07:07:03,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:03,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653079206] [2023-02-17 07:07:03,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:03,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924612272] [2023-02-17 07:07:03,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924612272] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:07:03,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:07:03,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-17 07:07:03,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408899178] [2023-02-17 07:07:03,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:07:03,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 07:07:03,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:03,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 07:07:03,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 07:07:03,612 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 07:07:03,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:03,699 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2023-02-17 07:07:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:07:03,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-02-17 07:07:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:03,701 INFO L225 Difference]: With dead ends: 49 [2023-02-17 07:07:03,701 INFO L226 Difference]: Without dead ends: 41 [2023-02-17 07:07:03,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-17 07:07:03,702 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:03,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 92 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:07:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-17 07:07:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2023-02-17 07:07:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 07:07:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-17 07:07:03,708 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 30 [2023-02-17 07:07:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:03,708 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-17 07:07:03,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 07:07:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-17 07:07:03,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-17 07:07:03,709 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:03,709 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:03,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 07:07:03,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:03,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:03,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:03,911 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2023-02-17 07:07:03,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:03,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461372957] [2023-02-17 07:07:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:03,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:03,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:03,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100498898] [2023-02-17 07:07:03,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:03,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:03,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:03,934 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:03,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 07:07:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:03,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 07:07:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 07:07:04,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 07:07:04,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:04,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461372957] [2023-02-17 07:07:04,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:04,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100498898] [2023-02-17 07:07:04,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100498898] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 07:07:04,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:07:04,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-17 07:07:04,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952014958] [2023-02-17 07:07:04,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:07:04,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:07:04,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:04,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:07:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-17 07:07:04,061 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 07:07:04,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:04,111 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-02-17 07:07:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:07:04,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-02-17 07:07:04,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:04,116 INFO L225 Difference]: With dead ends: 39 [2023-02-17 07:07:04,117 INFO L226 Difference]: Without dead ends: 37 [2023-02-17 07:07:04,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-17 07:07:04,122 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:04,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 114 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:07:04,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-17 07:07:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-17 07:07:04,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 07:07:04,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-02-17 07:07:04,128 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 32 [2023-02-17 07:07:04,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:04,128 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-02-17 07:07:04,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 07:07:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-02-17 07:07:04,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-17 07:07:04,129 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:04,129 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:04,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 07:07:04,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:04,338 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:04,339 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2023-02-17 07:07:04,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:04,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835668475] [2023-02-17 07:07:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:04,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:04,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:04,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265966130] [2023-02-17 07:07:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:04,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:04,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:04,352 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:04,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 07:07:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 07:07:04,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 07:07:04,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:07:04,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:04,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835668475] [2023-02-17 07:07:04,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:04,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265966130] [2023-02-17 07:07:04,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265966130] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:07:04,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:07:04,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 07:07:04,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21599974] [2023-02-17 07:07:04,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:07:04,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:07:04,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:04,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:07:04,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 07:07:04,416 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 07:07:04,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:04,427 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2023-02-17 07:07:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 07:07:04,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2023-02-17 07:07:04,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:04,428 INFO L225 Difference]: With dead ends: 62 [2023-02-17 07:07:04,428 INFO L226 Difference]: Without dead ends: 39 [2023-02-17 07:07:04,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 07:07:04,429 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:04,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:07:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-17 07:07:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-17 07:07:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 07:07:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-02-17 07:07:04,434 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 35 [2023-02-17 07:07:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:04,434 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-02-17 07:07:04,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 07:07:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-02-17 07:07:04,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 07:07:04,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:04,435 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:04,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 07:07:04,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:04,645 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:04,645 INFO L85 PathProgramCache]: Analyzing trace with hash 433790877, now seen corresponding path program 1 times [2023-02-17 07:07:04,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:04,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663790614] [2023-02-17 07:07:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:04,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:04,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:04,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233262575] [2023-02-17 07:07:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:04,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:04,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:04,664 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:04,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 07:07:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:04,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 07:07:04,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 07:07:04,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 07:07:04,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:04,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663790614] [2023-02-17 07:07:04,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:04,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233262575] [2023-02-17 07:07:04,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233262575] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 07:07:04,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:07:04,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-17 07:07:04,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729795380] [2023-02-17 07:07:04,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:07:04,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:07:04,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:04,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:07:04,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-17 07:07:04,783 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 07:07:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:04,824 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2023-02-17 07:07:04,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:07:04,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2023-02-17 07:07:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:04,826 INFO L225 Difference]: With dead ends: 53 [2023-02-17 07:07:04,826 INFO L226 Difference]: Without dead ends: 51 [2023-02-17 07:07:04,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-17 07:07:04,826 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:04,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:07:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-17 07:07:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-02-17 07:07:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 07:07:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2023-02-17 07:07:04,837 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 37 [2023-02-17 07:07:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:04,837 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2023-02-17 07:07:04,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 07:07:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2023-02-17 07:07:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 07:07:04,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:04,839 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:04,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 07:07:05,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:05,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:05,044 INFO L85 PathProgramCache]: Analyzing trace with hash -553232285, now seen corresponding path program 1 times [2023-02-17 07:07:05,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:05,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382759957] [2023-02-17 07:07:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:05,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:05,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:05,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218433739] [2023-02-17 07:07:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:05,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:05,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:05,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:05,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 07:07:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:05,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 07:07:05,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 07:07:05,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-17 07:07:05,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:05,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382759957] [2023-02-17 07:07:05,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:05,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218433739] [2023-02-17 07:07:05,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218433739] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 07:07:05,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:07:05,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-17 07:07:05,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149918206] [2023-02-17 07:07:05,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:07:05,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:07:05,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:05,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:07:05,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-17 07:07:05,191 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 07:07:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:05,229 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2023-02-17 07:07:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:07:05,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2023-02-17 07:07:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:05,231 INFO L225 Difference]: With dead ends: 57 [2023-02-17 07:07:05,231 INFO L226 Difference]: Without dead ends: 55 [2023-02-17 07:07:05,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-17 07:07:05,232 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:05,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 131 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:07:05,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-17 07:07:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2023-02-17 07:07:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 07:07:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2023-02-17 07:07:05,242 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 42 [2023-02-17 07:07:05,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:05,242 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2023-02-17 07:07:05,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 07:07:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2023-02-17 07:07:05,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-17 07:07:05,244 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:05,244 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:05,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 07:07:05,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:05,449 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2023-02-17 07:07:05,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:05,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742926869] [2023-02-17 07:07:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:05,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:05,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:05,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347870197] [2023-02-17 07:07:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:05,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:05,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:05,468 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:05,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 07:07:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:05,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 07:07:05,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 07:07:05,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:05,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:05,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742926869] [2023-02-17 07:07:05,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:05,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347870197] [2023-02-17 07:07:05,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347870197] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:07:05,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:07:05,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-17 07:07:05,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756923394] [2023-02-17 07:07:05,611 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:07:05,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 07:07:05,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:05,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 07:07:05,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-17 07:07:05,612 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-17 07:07:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:05,691 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2023-02-17 07:07:05,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 07:07:05,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-02-17 07:07:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:05,692 INFO L225 Difference]: With dead ends: 61 [2023-02-17 07:07:05,692 INFO L226 Difference]: Without dead ends: 59 [2023-02-17 07:07:05,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-17 07:07:05,693 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:05,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 115 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:07:05,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-17 07:07:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-02-17 07:07:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 07:07:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2023-02-17 07:07:05,700 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 47 [2023-02-17 07:07:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:05,700 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2023-02-17 07:07:05,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-17 07:07:05,700 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2023-02-17 07:07:05,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-17 07:07:05,701 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:05,701 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:05,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 07:07:05,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-17 07:07:05,906 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:05,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:05,907 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2023-02-17 07:07:05,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:05,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287515615] [2023-02-17 07:07:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:05,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:05,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:05,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619768806] [2023-02-17 07:07:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:05,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:05,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:05,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:05,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 07:07:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:05,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 07:07:05,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-17 07:07:05,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-17 07:07:06,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:06,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287515615] [2023-02-17 07:07:06,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:06,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619768806] [2023-02-17 07:07:06,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619768806] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:07:06,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:07:06,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-17 07:07:06,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863349458] [2023-02-17 07:07:06,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:07:06,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 07:07:06,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:06,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 07:07:06,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-17 07:07:06,028 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-17 07:07:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:06,145 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2023-02-17 07:07:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 07:07:06,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2023-02-17 07:07:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:06,150 INFO L225 Difference]: With dead ends: 211 [2023-02-17 07:07:06,150 INFO L226 Difference]: Without dead ends: 203 [2023-02-17 07:07:06,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-02-17 07:07:06,152 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 80 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:06,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 186 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:07:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-17 07:07:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2023-02-17 07:07:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-02-17 07:07:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2023-02-17 07:07:06,190 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2023-02-17 07:07:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:06,191 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2023-02-17 07:07:06,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-17 07:07:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2023-02-17 07:07:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 07:07:06,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:06,195 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:06,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 07:07:06,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:06,400 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2023-02-17 07:07:06,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:06,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808230325] [2023-02-17 07:07:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:06,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:06,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:06,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691099150] [2023-02-17 07:07:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:06,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:06,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:06,410 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:06,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 07:07:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:06,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 07:07:06,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-17 07:07:06,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-17 07:07:06,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:06,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808230325] [2023-02-17 07:07:06,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:06,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691099150] [2023-02-17 07:07:06,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691099150] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:07:06,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:07:06,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-17 07:07:06,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329762110] [2023-02-17 07:07:06,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:07:06,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 07:07:06,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:06,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 07:07:06,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-17 07:07:06,574 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-17 07:07:06,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:06,740 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2023-02-17 07:07:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 07:07:06,740 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2023-02-17 07:07:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:06,741 INFO L225 Difference]: With dead ends: 279 [2023-02-17 07:07:06,741 INFO L226 Difference]: Without dead ends: 259 [2023-02-17 07:07:06,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-17 07:07:06,742 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 70 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:06,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 334 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:07:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-17 07:07:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2023-02-17 07:07:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-02-17 07:07:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2023-02-17 07:07:06,760 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2023-02-17 07:07:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:06,761 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2023-02-17 07:07:06,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-17 07:07:06,761 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2023-02-17 07:07:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 07:07:06,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:06,761 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:06,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 07:07:06,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 07:07:06,966 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:06,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:06,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2023-02-17 07:07:06,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:06,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655154504] [2023-02-17 07:07:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:06,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:06,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:06,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500501061] [2023-02-17 07:07:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:06,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:06,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:06,991 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:07,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 07:07:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:07,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 07:07:07,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-17 07:07:07,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-17 07:07:07,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:07,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655154504] [2023-02-17 07:07:07,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:07,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500501061] [2023-02-17 07:07:07,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500501061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:07:07,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:07:07,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-17 07:07:07,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628028945] [2023-02-17 07:07:07,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:07:07,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 07:07:07,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:07,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 07:07:07,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-17 07:07:07,075 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-17 07:07:07,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:07,216 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2023-02-17 07:07:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 07:07:07,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 59 [2023-02-17 07:07:07,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:07,219 INFO L225 Difference]: With dead ends: 344 [2023-02-17 07:07:07,219 INFO L226 Difference]: Without dead ends: 248 [2023-02-17 07:07:07,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-17 07:07:07,221 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 74 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:07,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 200 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:07:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-02-17 07:07:07,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2023-02-17 07:07:07,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-02-17 07:07:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2023-02-17 07:07:07,244 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2023-02-17 07:07:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:07,245 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2023-02-17 07:07:07,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-17 07:07:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2023-02-17 07:07:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 07:07:07,246 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:07,246 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:07,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 07:07:07,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-17 07:07:07,453 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:07,453 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2023-02-17 07:07:07,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:07,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173150317] [2023-02-17 07:07:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:07,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:07,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:07,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539338592] [2023-02-17 07:07:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:07,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:07,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:07,481 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:07,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 07:07:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:07,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 07:07:07,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-17 07:07:07,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-17 07:07:07,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:07,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173150317] [2023-02-17 07:07:07,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:07,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539338592] [2023-02-17 07:07:07,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539338592] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:07:07,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:07:07,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-17 07:07:07,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278447722] [2023-02-17 07:07:07,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:07:07,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 07:07:07,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:07,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 07:07:07,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-17 07:07:07,714 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-02-17 07:07:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:08,160 INFO L93 Difference]: Finished difference Result 330 states and 429 transitions. [2023-02-17 07:07:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 07:07:08,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 64 [2023-02-17 07:07:08,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:08,162 INFO L225 Difference]: With dead ends: 330 [2023-02-17 07:07:08,163 INFO L226 Difference]: Without dead ends: 324 [2023-02-17 07:07:08,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-02-17 07:07:08,163 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 66 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:08,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 345 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 07:07:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-02-17 07:07:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2023-02-17 07:07:08,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 203 states have internal predecessors, (232), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2023-02-17 07:07:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2023-02-17 07:07:08,202 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 64 [2023-02-17 07:07:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:08,203 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2023-02-17 07:07:08,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-02-17 07:07:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2023-02-17 07:07:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-17 07:07:08,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:08,204 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:08,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-17 07:07:08,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-17 07:07:08,409 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:08,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:08,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2023-02-17 07:07:08,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:08,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684645230] [2023-02-17 07:07:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:08,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:08,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:08,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996093719] [2023-02-17 07:07:08,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:07:08,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:08,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:08,440 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:08,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 07:07:08,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:07:08,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:07:08,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-17 07:07:08,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 26 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-17 07:07:08,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:08,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:08,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684645230] [2023-02-17 07:07:08,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:08,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996093719] [2023-02-17 07:07:08,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996093719] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:07:08,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:07:08,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-17 07:07:08,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969585135] [2023-02-17 07:07:08,625 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:07:08,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 07:07:08,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:08,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 07:07:08,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-02-17 07:07:08,626 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-17 07:07:09,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:09,054 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2023-02-17 07:07:09,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 07:07:09,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 69 [2023-02-17 07:07:09,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:09,056 INFO L225 Difference]: With dead ends: 315 [2023-02-17 07:07:09,056 INFO L226 Difference]: Without dead ends: 313 [2023-02-17 07:07:09,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-02-17 07:07:09,057 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:09,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 198 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 07:07:09,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-02-17 07:07:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2023-02-17 07:07:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 215 states have internal predecessors, (246), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2023-02-17 07:07:09,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 388 transitions. [2023-02-17 07:07:09,087 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 388 transitions. Word has length 69 [2023-02-17 07:07:09,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:09,088 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 388 transitions. [2023-02-17 07:07:09,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-17 07:07:09,088 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 388 transitions. [2023-02-17 07:07:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-17 07:07:09,088 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:09,088 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:09,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 07:07:09,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-17 07:07:09,293 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2023-02-17 07:07:09,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:09,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809961020] [2023-02-17 07:07:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:09,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:09,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:09,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410950353] [2023-02-17 07:07:09,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:07:09,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:09,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:09,331 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:09,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 07:07:09,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 07:07:09,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:07:09,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-17 07:07:09,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-17 07:07:09,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-17 07:07:10,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:10,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809961020] [2023-02-17 07:07:10,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:10,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410950353] [2023-02-17 07:07:10,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410950353] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:07:10,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:07:10,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2023-02-17 07:07:10,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049497669] [2023-02-17 07:07:10,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:07:10,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 07:07:10,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 07:07:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2023-02-17 07:07:10,628 INFO L87 Difference]: Start difference. First operand 310 states and 388 transitions. Second operand has 24 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-17 07:07:14,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:07:17,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:07:24,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:07:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:29,444 INFO L93 Difference]: Finished difference Result 402 states and 527 transitions. [2023-02-17 07:07:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 07:07:29,445 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74 [2023-02-17 07:07:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:29,447 INFO L225 Difference]: With dead ends: 402 [2023-02-17 07:07:29,447 INFO L226 Difference]: Without dead ends: 398 [2023-02-17 07:07:29,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 07:07:29,448 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 184 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 157 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:29,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 267 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 797 Invalid, 2 Unknown, 0 Unchecked, 16.7s Time] [2023-02-17 07:07:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-02-17 07:07:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 367. [2023-02-17 07:07:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 241 states have (on average 1.2157676348547717) internal successors, (293), 250 states have internal predecessors, (293), 93 states have call successors, (93), 33 states have call predecessors, (93), 32 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2023-02-17 07:07:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 475 transitions. [2023-02-17 07:07:29,512 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 475 transitions. Word has length 74 [2023-02-17 07:07:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:29,512 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 475 transitions. [2023-02-17 07:07:29,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-17 07:07:29,512 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 475 transitions. [2023-02-17 07:07:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-17 07:07:29,513 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:29,513 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:29,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 07:07:29,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:29,730 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2023-02-17 07:07:29,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:29,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707219366] [2023-02-17 07:07:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:29,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:29,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:29,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554307171] [2023-02-17 07:07:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:29,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:29,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:29,738 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:29,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 07:07:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:29,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-17 07:07:29,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-17 07:07:29,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-17 07:07:30,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:30,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707219366] [2023-02-17 07:07:30,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:30,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554307171] [2023-02-17 07:07:30,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554307171] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:07:30,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:07:30,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-17 07:07:30,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571459910] [2023-02-17 07:07:30,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:07:30,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 07:07:30,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:30,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 07:07:30,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-17 07:07:30,454 INFO L87 Difference]: Start difference. First operand 367 states and 475 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-17 07:07:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:38,807 INFO L93 Difference]: Finished difference Result 523 states and 722 transitions. [2023-02-17 07:07:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-17 07:07:38,807 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2023-02-17 07:07:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:38,809 INFO L225 Difference]: With dead ends: 523 [2023-02-17 07:07:38,809 INFO L226 Difference]: Without dead ends: 512 [2023-02-17 07:07:38,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 07:07:38,812 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 169 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:38,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 670 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-02-17 07:07:38,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-02-17 07:07:38,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 478. [2023-02-17 07:07:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 311 states have (on average 1.2668810289389068) internal successors, (394), 321 states have internal predecessors, (394), 133 states have call successors, (133), 33 states have call predecessors, (133), 33 states have return successors, (131), 123 states have call predecessors, (131), 131 states have call successors, (131) [2023-02-17 07:07:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 658 transitions. [2023-02-17 07:07:38,935 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 658 transitions. Word has length 80 [2023-02-17 07:07:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:38,935 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 658 transitions. [2023-02-17 07:07:38,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-17 07:07:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 658 transitions. [2023-02-17 07:07:38,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-17 07:07:38,936 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:38,936 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:38,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-17 07:07:39,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 07:07:39,141 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:39,142 INFO L85 PathProgramCache]: Analyzing trace with hash 164622435, now seen corresponding path program 4 times [2023-02-17 07:07:39,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:39,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700733056] [2023-02-17 07:07:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:39,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:39,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:39,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106313780] [2023-02-17 07:07:39,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 07:07:39,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:39,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:39,163 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:07:39,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 07:07:39,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 07:07:39,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:07:39,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 07:07:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-17 07:07:39,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:07:39,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:39,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700733056] [2023-02-17 07:07:39,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:39,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106313780] [2023-02-17 07:07:39,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106313780] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:07:39,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:07:39,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 07:07:39,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838269952] [2023-02-17 07:07:39,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:07:39,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:07:39,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:39,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:07:39,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 07:07:39,226 INFO L87 Difference]: Start difference. First operand 478 states and 658 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-17 07:07:39,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:39,409 INFO L93 Difference]: Finished difference Result 745 states and 1090 transitions. [2023-02-17 07:07:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:07:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 96 [2023-02-17 07:07:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:39,412 INFO L225 Difference]: With dead ends: 745 [2023-02-17 07:07:39,412 INFO L226 Difference]: Without dead ends: 513 [2023-02-17 07:07:39,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-17 07:07:39,413 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:39,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 163 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:07:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-02-17 07:07:39,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 470. [2023-02-17 07:07:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 303 states have (on average 1.2640264026402641) internal successors, (383), 311 states have internal predecessors, (383), 133 states have call successors, (133), 33 states have call predecessors, (133), 33 states have return successors, (131), 125 states have call predecessors, (131), 131 states have call successors, (131) [2023-02-17 07:07:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 647 transitions. [2023-02-17 07:07:39,562 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 647 transitions. Word has length 96 [2023-02-17 07:07:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:39,562 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 647 transitions. [2023-02-17 07:07:39,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-17 07:07:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 647 transitions. [2023-02-17 07:07:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-17 07:07:39,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:39,564 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:39,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 07:07:39,770 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 [2023-02-17 07:07:39,770 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:39,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2023-02-17 07:07:39,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:39,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947863065] [2023-02-17 07:07:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:39,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:39,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:39,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488581121] [2023-02-17 07:07:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:39,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:39,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:39,781 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) [2023-02-17 07:07:39,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 07:07:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:39,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 07:07:39,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-02-17 07:07:39,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-02-17 07:07:39,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:39,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947863065] [2023-02-17 07:07:39,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:39,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488581121] [2023-02-17 07:07:39,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488581121] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:07:39,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:07:39,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-17 07:07:39,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044942289] [2023-02-17 07:07:39,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:07:39,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 07:07:39,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:39,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 07:07:39,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-17 07:07:39,953 INFO L87 Difference]: Start difference. First operand 470 states and 647 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-17 07:07:40,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:07:40,507 INFO L93 Difference]: Finished difference Result 1512 states and 2112 transitions. [2023-02-17 07:07:40,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-17 07:07:40,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 112 [2023-02-17 07:07:40,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:07:40,512 INFO L225 Difference]: With dead ends: 1512 [2023-02-17 07:07:40,512 INFO L226 Difference]: Without dead ends: 1270 [2023-02-17 07:07:40,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2023-02-17 07:07:40,513 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 201 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:07:40,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 363 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:07:40,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2023-02-17 07:07:40,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1208. [2023-02-17 07:07:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 758 states have (on average 1.2097625329815302) internal successors, (917), 780 states have internal predecessors, (917), 344 states have call successors, (344), 105 states have call predecessors, (344), 105 states have return successors, (335), 322 states have call predecessors, (335), 335 states have call successors, (335) [2023-02-17 07:07:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1596 transitions. [2023-02-17 07:07:40,847 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1596 transitions. Word has length 112 [2023-02-17 07:07:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:07:40,848 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1596 transitions. [2023-02-17 07:07:40,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-17 07:07:40,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1596 transitions. [2023-02-17 07:07:40,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-17 07:07:40,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:07:40,849 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:07:40,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-17 07:07:41,053 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 [2023-02-17 07:07:41,054 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:07:41,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:07:41,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1897577373, now seen corresponding path program 1 times [2023-02-17 07:07:41,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:07:41,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21211510] [2023-02-17 07:07:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:41,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:07:41,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:07:41,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119615698] [2023-02-17 07:07:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:07:41,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:07:41,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:07:41,069 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) [2023-02-17 07:07:41,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 07:07:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:07:41,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-17 07:07:41,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:07:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-17 07:07:41,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:07:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-17 07:07:42,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:07:42,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21211510] [2023-02-17 07:07:42,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:07:42,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119615698] [2023-02-17 07:07:42,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119615698] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:07:42,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:07:42,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-02-17 07:07:42,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947793819] [2023-02-17 07:07:42,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:07:42,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 07:07:42,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:07:42,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 07:07:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-02-17 07:07:42,726 INFO L87 Difference]: Start difference. First operand 1208 states and 1596 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-17 07:07:53,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:08:04,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:08:04,110 INFO L93 Difference]: Finished difference Result 1609 states and 2177 transitions. [2023-02-17 07:08:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-17 07:08:04,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 115 [2023-02-17 07:08:04,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:08:04,118 INFO L225 Difference]: With dead ends: 1609 [2023-02-17 07:08:04,118 INFO L226 Difference]: Without dead ends: 1607 [2023-02-17 07:08:04,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=585, Invalid=2277, Unknown=0, NotChecked=0, Total=2862 [2023-02-17 07:08:04,120 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 179 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 365 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2023-02-17 07:08:04,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 796 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1478 Invalid, 1 Unknown, 0 Unchecked, 14.4s Time] [2023-02-17 07:08:04,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2023-02-17 07:08:04,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1489. [2023-02-17 07:08:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 918 states have (on average 1.2080610021786493) internal successors, (1109), 937 states have internal predecessors, (1109), 448 states have call successors, (448), 122 states have call predecessors, (448), 122 states have return successors, (439), 429 states have call predecessors, (439), 439 states have call successors, (439) [2023-02-17 07:08:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 1996 transitions. [2023-02-17 07:08:04,801 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 1996 transitions. Word has length 115 [2023-02-17 07:08:04,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:08:04,801 INFO L495 AbstractCegarLoop]: Abstraction has 1489 states and 1996 transitions. [2023-02-17 07:08:04,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-17 07:08:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 1996 transitions. [2023-02-17 07:08:04,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-02-17 07:08:04,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:08:04,803 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:08:04,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 07:08:05,009 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 [2023-02-17 07:08:05,009 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:08:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:08:05,010 INFO L85 PathProgramCache]: Analyzing trace with hash 364386885, now seen corresponding path program 2 times [2023-02-17 07:08:05,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:08:05,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910478105] [2023-02-17 07:08:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:08:05,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:08:05,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:08:05,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867970824] [2023-02-17 07:08:05,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:08:05,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:08:05,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:08:05,024 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) [2023-02-17 07:08:05,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 07:08:05,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:08:05,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:08:05,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-17 07:08:05,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:08:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-17 07:08:05,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:08:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-17 07:08:05,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:08:05,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910478105] [2023-02-17 07:08:05,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:08:05,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867970824] [2023-02-17 07:08:05,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867970824] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:08:05,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:08:05,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-02-17 07:08:05,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781842521] [2023-02-17 07:08:05,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:08:05,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 07:08:05,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:08:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 07:08:05,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-02-17 07:08:05,799 INFO L87 Difference]: Start difference. First operand 1489 states and 1996 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2023-02-17 07:08:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:08:17,636 INFO L93 Difference]: Finished difference Result 2127 states and 2894 transitions. [2023-02-17 07:08:17,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-17 07:08:17,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) Word has length 119 [2023-02-17 07:08:17,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:08:17,643 INFO L225 Difference]: With dead ends: 2127 [2023-02-17 07:08:17,644 INFO L226 Difference]: Without dead ends: 2125 [2023-02-17 07:08:17,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=682, Invalid=2624, Unknown=0, NotChecked=0, Total=3306 [2023-02-17 07:08:17,645 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 212 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:08:17,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 820 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-02-17 07:08:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2023-02-17 07:08:18,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1947. [2023-02-17 07:08:18,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1218 states have (on average 1.2233169129720853) internal successors, (1490), 1237 states have internal predecessors, (1490), 573 states have call successors, (573), 155 states have call predecessors, (573), 155 states have return successors, (564), 554 states have call predecessors, (564), 564 states have call successors, (564) [2023-02-17 07:08:18,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2627 transitions. [2023-02-17 07:08:18,516 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2627 transitions. Word has length 119 [2023-02-17 07:08:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:08:18,516 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 2627 transitions. [2023-02-17 07:08:18,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2023-02-17 07:08:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2627 transitions. [2023-02-17 07:08:18,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-17 07:08:18,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:08:18,518 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:08:18,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-17 07:08:18,722 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 [2023-02-17 07:08:18,723 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:08:18,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:08:18,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1493115269, now seen corresponding path program 3 times [2023-02-17 07:08:18,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:08:18,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823062960] [2023-02-17 07:08:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:08:18,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:08:18,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:08:18,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926262460] [2023-02-17 07:08:18,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:08:18,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:08:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:08:18,735 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) [2023-02-17 07:08:18,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 07:08:18,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 07:08:18,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:08:18,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-17 07:08:18,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:08:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 80 proven. 50 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-02-17 07:08:19,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:08:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 90 proven. 40 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-02-17 07:08:24,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:08:24,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823062960] [2023-02-17 07:08:24,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:08:24,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926262460] [2023-02-17 07:08:24,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926262460] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:08:24,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:08:24,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2023-02-17 07:08:24,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656373698] [2023-02-17 07:08:24,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:08:24,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-17 07:08:24,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:08:24,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-17 07:08:24,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=707, Unknown=1, NotChecked=0, Total=870 [2023-02-17 07:08:24,469 INFO L87 Difference]: Start difference. First operand 1947 states and 2627 transitions. Second operand has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 14 states have call predecessors, (36), 11 states have call successors, (36) [2023-02-17 07:08:36,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:08:38,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:08:42,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:08:45,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:08:50,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:08:54,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.54s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:08:56,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:09:00,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:09:03,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:09:05,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:09:07,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:09:16,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:09:20,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:09:22,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:09:46,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 23.64s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:09:47,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:09:47,148 INFO L93 Difference]: Finished difference Result 2451 states and 3366 transitions. [2023-02-17 07:09:47,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 07:09:47,149 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 14 states have call predecessors, (36), 11 states have call successors, (36) Word has length 124 [2023-02-17 07:09:47,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:09:47,157 INFO L225 Difference]: With dead ends: 2451 [2023-02-17 07:09:47,157 INFO L226 Difference]: Without dead ends: 2445 [2023-02-17 07:09:47,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=558, Invalid=1985, Unknown=7, NotChecked=0, Total=2550 [2023-02-17 07:09:47,159 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 185 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 162 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.3s IncrementalHoareTripleChecker+Time [2023-02-17 07:09:47,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 437 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1286 Invalid, 13 Unknown, 0 Unchecked, 60.3s Time] [2023-02-17 07:09:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2023-02-17 07:09:48,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2343. [2023-02-17 07:09:48,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 1457 states have (on average 1.2271791352093342) internal successors, (1788), 1481 states have internal predecessors, (1788), 716 states have call successors, (716), 170 states have call predecessors, (716), 169 states have return successors, (708), 691 states have call predecessors, (708), 708 states have call successors, (708) [2023-02-17 07:09:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 3212 transitions. [2023-02-17 07:09:48,435 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 3212 transitions. Word has length 124 [2023-02-17 07:09:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:09:48,435 INFO L495 AbstractCegarLoop]: Abstraction has 2343 states and 3212 transitions. [2023-02-17 07:09:48,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 14 states have call predecessors, (36), 11 states have call successors, (36) [2023-02-17 07:09:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 3212 transitions. [2023-02-17 07:09:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-02-17 07:09:48,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:09:48,439 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:09:48,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 07:09:48,645 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 [2023-02-17 07:09:48,645 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:09:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:09:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1036292276, now seen corresponding path program 1 times [2023-02-17 07:09:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:09:48,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831367336] [2023-02-17 07:09:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:09:48,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:09:48,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:09:48,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351685893] [2023-02-17 07:09:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:09:48,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:09:48,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:09:48,655 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) [2023-02-17 07:09:48,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 07:09:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:09:48,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 07:09:48,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:09:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-17 07:09:48,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:09:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2023-02-17 07:09:48,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:09:48,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831367336] [2023-02-17 07:09:48,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:09:48,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351685893] [2023-02-17 07:09:48,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351685893] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:09:48,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:09:48,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-17 07:09:48,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261928824] [2023-02-17 07:09:48,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:09:48,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 07:09:48,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:09:48,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 07:09:48,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-17 07:09:48,842 INFO L87 Difference]: Start difference. First operand 2343 states and 3212 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-17 07:09:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:09:50,462 INFO L93 Difference]: Finished difference Result 2419 states and 3288 transitions. [2023-02-17 07:09:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-17 07:09:50,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 129 [2023-02-17 07:09:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:09:50,469 INFO L225 Difference]: With dead ends: 2419 [2023-02-17 07:09:50,470 INFO L226 Difference]: Without dead ends: 2384 [2023-02-17 07:09:50,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2023-02-17 07:09:50,471 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 188 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:09:50,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 429 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:09:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2023-02-17 07:09:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2367. [2023-02-17 07:09:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 1481 states have (on average 1.1931127616475354) internal successors, (1767), 1505 states have internal predecessors, (1767), 716 states have call successors, (716), 170 states have call predecessors, (716), 169 states have return successors, (708), 691 states have call predecessors, (708), 708 states have call successors, (708) [2023-02-17 07:09:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 3191 transitions. [2023-02-17 07:09:51,699 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 3191 transitions. Word has length 129 [2023-02-17 07:09:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:09:51,700 INFO L495 AbstractCegarLoop]: Abstraction has 2367 states and 3191 transitions. [2023-02-17 07:09:51,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-17 07:09:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 3191 transitions. [2023-02-17 07:09:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-17 07:09:51,702 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:09:51,703 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:09:51,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 07:09:51,909 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 [2023-02-17 07:09:51,910 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:09:51,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:09:51,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2066876172, now seen corresponding path program 2 times [2023-02-17 07:09:51,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:09:51,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872787628] [2023-02-17 07:09:51,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:09:51,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:09:51,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:09:51,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822381971] [2023-02-17 07:09:51,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:09:51,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:09:51,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:09:51,918 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) [2023-02-17 07:09:51,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 07:09:51,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:09:51,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:09:51,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-17 07:09:52,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:09:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 35 proven. 58 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-02-17 07:09:52,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:09:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2023-02-17 07:09:53,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:09:53,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872787628] [2023-02-17 07:09:53,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:09:53,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822381971] [2023-02-17 07:09:53,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822381971] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:09:53,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:09:53,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-17 07:09:53,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138003813] [2023-02-17 07:09:53,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:09:53,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 07:09:53,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:09:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 07:09:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-02-17 07:09:53,241 INFO L87 Difference]: Start difference. First operand 2367 states and 3191 transitions. Second operand has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2023-02-17 07:10:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:10:20,200 INFO L93 Difference]: Finished difference Result 2787 states and 3798 transitions. [2023-02-17 07:10:20,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-17 07:10:20,202 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) Word has length 130 [2023-02-17 07:10:20,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:10:20,211 INFO L225 Difference]: With dead ends: 2787 [2023-02-17 07:10:20,211 INFO L226 Difference]: Without dead ends: 2756 [2023-02-17 07:10:20,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 230 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1270, Invalid=5702, Unknown=0, NotChecked=0, Total=6972 [2023-02-17 07:10:20,214 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 369 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:10:20,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1105 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 18.2s Time] [2023-02-17 07:10:20,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2023-02-17 07:10:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2501. [2023-02-17 07:10:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 1564 states have (on average 1.1950127877237853) internal successors, (1869), 1588 states have internal predecessors, (1869), 756 states have call successors, (756), 181 states have call predecessors, (756), 180 states have return successors, (748), 731 states have call predecessors, (748), 748 states have call successors, (748) [2023-02-17 07:10:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 3373 transitions. [2023-02-17 07:10:21,602 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 3373 transitions. Word has length 130 [2023-02-17 07:10:21,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:10:21,603 INFO L495 AbstractCegarLoop]: Abstraction has 2501 states and 3373 transitions. [2023-02-17 07:10:21,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2023-02-17 07:10:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 3373 transitions. [2023-02-17 07:10:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-02-17 07:10:21,605 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:10:21,605 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:10:21,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 07:10:21,810 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 [2023-02-17 07:10:21,810 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:10:21,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:10:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1550955276, now seen corresponding path program 3 times [2023-02-17 07:10:21,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:10:21,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627270740] [2023-02-17 07:10:21,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:10:21,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:10:21,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:10:21,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035681448] [2023-02-17 07:10:21,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:10:21,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:10:21,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:10:21,819 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) [2023-02-17 07:10:21,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 07:10:21,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 07:10:21,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:10:21,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-17 07:10:21,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:10:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 93 proven. 32 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2023-02-17 07:10:21,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:10:24,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:10:24,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627270740] [2023-02-17 07:10:24,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:10:24,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035681448] [2023-02-17 07:10:24,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035681448] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:10:24,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:10:24,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-17 07:10:24,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272706079] [2023-02-17 07:10:24,142 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:10:24,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 07:10:24,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:10:24,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 07:10:24,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=291, Unknown=1, NotChecked=0, Total=342 [2023-02-17 07:10:24,147 INFO L87 Difference]: Start difference. First operand 2501 states and 3373 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-17 07:10:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:10:25,814 INFO L93 Difference]: Finished difference Result 2706 states and 3612 transitions. [2023-02-17 07:10:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 07:10:25,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 149 [2023-02-17 07:10:25,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:10:25,828 INFO L225 Difference]: With dead ends: 2706 [2023-02-17 07:10:25,828 INFO L226 Difference]: Without dead ends: 2671 [2023-02-17 07:10:25,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=83, Invalid=468, Unknown=1, NotChecked=0, Total=552 [2023-02-17 07:10:25,829 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:10:25,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 233 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:10:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2023-02-17 07:10:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2608. [2023-02-17 07:10:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2608 states, 1633 states have (on average 1.1867728107777098) internal successors, (1938), 1653 states have internal predecessors, (1938), 779 states have call successors, (779), 195 states have call predecessors, (779), 195 states have return successors, (772), 759 states have call predecessors, (772), 772 states have call successors, (772) [2023-02-17 07:10:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2608 states to 2608 states and 3489 transitions. [2023-02-17 07:10:27,357 INFO L78 Accepts]: Start accepts. Automaton has 2608 states and 3489 transitions. Word has length 149 [2023-02-17 07:10:27,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:10:27,357 INFO L495 AbstractCegarLoop]: Abstraction has 2608 states and 3489 transitions. [2023-02-17 07:10:27,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-17 07:10:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2608 states and 3489 transitions. [2023-02-17 07:10:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-02-17 07:10:27,360 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:10:27,360 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:10:27,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-17 07:10:27,575 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 [2023-02-17 07:10:27,575 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:10:27,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:10:27,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1547189055, now seen corresponding path program 4 times [2023-02-17 07:10:27,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:10:27,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054811251] [2023-02-17 07:10:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:10:27,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:10:27,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:10:27,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002563449] [2023-02-17 07:10:27,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 07:10:27,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:10:27,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:10:27,583 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) [2023-02-17 07:10:27,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-17 07:10:27,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 07:10:27,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:10:27,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-17 07:10:27,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:10:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 211 proven. 134 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2023-02-17 07:10:28,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:10:33,440 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_main_~r~0#1| (- (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (.cse5 (+ |c_ULTIMATE.start_main_~p~0#1| (- (* |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~k~0#1|))))) (let ((.cse11 (* |c_ULTIMATE.start_main_~x~0#1| .cse5)) (.cse12 (* |c_ULTIMATE.start_main_~y~0#1| .cse3))) (let ((.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse8 (* (- 2) |c_ULTIMATE.start_main_~x~0#1| .cse5)) (.cse9 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse10 (* (- 2) |c_ULTIMATE.start_main_~y~0#1| .cse3)) (.cse6 (+ .cse11 .cse12))) (or (= 0 (let ((.cse4 (+ 1 (+ 1 0)))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~q~0#1| (- (* .cse5 .cse4)))) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1| (- (* .cse3 .cse4))))) (let ((.cse2 (+ (* |c_ULTIMATE.start_main_~x~0#1| .cse0) (* |c_ULTIMATE.start_main_~y~0#1| .cse1)))) (+ (+ (+ (+ (+ (* .cse0 |c_ULTIMATE.start_main_~xy~0#1|) (* .cse1 |c_ULTIMATE.start_main_~yy~0#1|)) (- (* .cse0 |c_ULTIMATE.start_main_~x~0#1|))) (- (* .cse2 |c_ULTIMATE.start_main_~y~0#1|))) (- (* .cse1 |c_ULTIMATE.start_main_~y~0#1|))) .cse2))))) (>= (+ (+ (* (- 1) |c_ULTIMATE.start_main_~x~0#1| 0 .cse5) (* (- 1) |c_ULTIMATE.start_main_~y~0#1| 0 .cse3) .cse6 .cse7 .cse8 .cse9 .cse10) (+ (- .cse11) (- .cse12))) .cse6) (not (= 0 (+ (+ (+ (+ (+ (* .cse5 |c_ULTIMATE.start_main_~xy~0#1|) (* .cse3 |c_ULTIMATE.start_main_~yy~0#1|)) (- (* .cse5 |c_ULTIMATE.start_main_~x~0#1|))) (- (* .cse6 |c_ULTIMATE.start_main_~y~0#1|))) (- (* .cse3 |c_ULTIMATE.start_main_~y~0#1|))) .cse6))) (not (= (+ (* 2 .cse6) .cse7 .cse8 .cse9 .cse10) |c_ULTIMATE.start_main_~b~0#1|)) (not (= .cse6 |c_ULTIMATE.start_main_~c~0#1|)))))) is different from true [2023-02-17 07:10:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 226 proven. 95 refuted. 14 times theorem prover too weak. 856 trivial. 1 not checked. [2023-02-17 07:10:45,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:10:45,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054811251] [2023-02-17 07:10:45,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:10:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002563449] [2023-02-17 07:10:45,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002563449] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:10:45,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:10:45,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2023-02-17 07:10:45,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018790002] [2023-02-17 07:10:45,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:10:45,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-17 07:10:45,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:10:45,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-17 07:10:45,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=840, Unknown=4, NotChecked=62, Total=1122 [2023-02-17 07:10:45,991 INFO L87 Difference]: Start difference. First operand 2608 states and 3489 transitions. Second operand has 34 states, 32 states have (on average 2.46875) internal successors, (79), 29 states have internal predecessors, (79), 18 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 19 states have call predecessors, (54), 17 states have call successors, (54) [2023-02-17 07:10:47,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:10:50,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:10:52,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:10:57,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:10:59,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:01,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:04,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:06,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:08,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:10,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:12,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:14,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:15,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:19,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:22,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:26,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:32,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:35,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:37,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:40,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:11:42,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []