./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/egcd3-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-14 00:11:41,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 00:11:41,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 00:11:41,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 00:11:41,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 00:11:41,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 00:11:41,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 00:11:41,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 00:11:41,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 00:11:41,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 00:11:41,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 00:11:41,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 00:11:41,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 00:11:41,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 00:11:41,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 00:11:41,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 00:11:41,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 00:11:41,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 00:11:41,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 00:11:41,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 00:11:41,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 00:11:41,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 00:11:41,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 00:11:41,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 00:11:41,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 00:11:41,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 00:11:41,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 00:11:41,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 00:11:41,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 00:11:41,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 00:11:41,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 00:11:41,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 00:11:41,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 00:11:41,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 00:11:41,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 00:11:41,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 00:11:41,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 00:11:41,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 00:11:41,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 00:11:41,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 00:11:41,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 00:11:41,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 00:11:41,399 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 00:11:41,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 00:11:41,400 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 00:11:41,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 00:11:41,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 00:11:41,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 00:11:41,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 00:11:41,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 00:11:41,403 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 00:11:41,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 00:11:41,404 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 00:11:41,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 00:11:41,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 00:11:41,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 00:11:41,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 00:11:41,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 00:11:41,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 00:11:41,405 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 00:11:41,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 00:11:41,405 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 00:11:41,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 00:11:41,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 00:11:41,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 00:11:41,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 00:11:41,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 00:11:41,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 00:11:41,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 00:11:41,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 00:11:41,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 00:11:41,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 00:11:41,407 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 00:11:41,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 00:11:41,408 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 00:11:41,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 00:11:41,408 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 00:11:41,408 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2023-02-14 00:11:41,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 00:11:41,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 00:11:41,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 00:11:41,620 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 00:11:41,620 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 00:11:41,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2023-02-14 00:11:42,605 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 00:11:42,768 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 00:11:42,768 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2023-02-14 00:11:42,773 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d3bfcac8/82563b4409c246d28e9e6815518ce122/FLAG47a540bb1 [2023-02-14 00:11:42,788 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d3bfcac8/82563b4409c246d28e9e6815518ce122 [2023-02-14 00:11:42,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 00:11:42,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 00:11:42,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 00:11:42,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 00:11:42,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 00:11:42,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:11:42" (1/1) ... [2023-02-14 00:11:42,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2994b442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:42, skipping insertion in model container [2023-02-14 00:11:42,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:11:42" (1/1) ... [2023-02-14 00:11:42,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 00:11:42,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 00:11:42,961 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/egcd3-ll.c[490,503] [2023-02-14 00:11:42,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 00:11:42,983 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 00:11:42,990 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/egcd3-ll.c[490,503] [2023-02-14 00:11:42,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 00:11:43,005 INFO L208 MainTranslator]: Completed translation [2023-02-14 00:11:43,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43 WrapperNode [2023-02-14 00:11:43,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 00:11:43,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 00:11:43,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 00:11:43,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 00:11:43,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43" (1/1) ... [2023-02-14 00:11:43,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43" (1/1) ... [2023-02-14 00:11:43,027 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2023-02-14 00:11:43,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 00:11:43,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 00:11:43,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 00:11:43,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 00:11:43,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43" (1/1) ... [2023-02-14 00:11:43,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43" (1/1) ... [2023-02-14 00:11:43,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43" (1/1) ... [2023-02-14 00:11:43,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43" (1/1) ... [2023-02-14 00:11:43,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43" (1/1) ... [2023-02-14 00:11:43,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43" (1/1) ... [2023-02-14 00:11:43,040 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43" (1/1) ... [2023-02-14 00:11:43,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43" (1/1) ... [2023-02-14 00:11:43,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 00:11:43,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 00:11:43,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 00:11:43,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 00:11:43,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43" (1/1) ... [2023-02-14 00:11:43,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 00:11:43,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:11:43,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 00:11:43,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 00:11:43,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 00:11:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 00:11:43,101 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 00:11:43,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 00:11:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 00:11:43,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 00:11:43,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 00:11:43,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 00:11:43,149 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 00:11:43,151 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 00:11:43,269 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 00:11:43,273 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 00:11:43,274 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 00:11:43,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:11:43 BoogieIcfgContainer [2023-02-14 00:11:43,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 00:11:43,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 00:11:43,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 00:11:43,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 00:11:43,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 12:11:42" (1/3) ... [2023-02-14 00:11:43,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef79f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:11:43, skipping insertion in model container [2023-02-14 00:11:43,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:11:43" (2/3) ... [2023-02-14 00:11:43,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef79f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:11:43, skipping insertion in model container [2023-02-14 00:11:43,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:11:43" (3/3) ... [2023-02-14 00:11:43,282 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2023-02-14 00:11:43,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 00:11:43,295 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 00:11:43,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 00:11:43,330 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;@6263d439, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 00:11:43,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 00:11:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 00:11:43,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 00:11:43,337 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:11:43,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:11:43,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:11:43,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:11:43,342 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2023-02-14 00:11:43,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:11:43,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077456425] [2023-02-14 00:11:43,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:43,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:11:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:11:43,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:11:43,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077456425] [2023-02-14 00:11:43,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 00:11:43,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954690905] [2023-02-14 00:11:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:43,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:43,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:11:43,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:11:43,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 00:11:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:11:43,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 00:11:43,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:11:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 00:11:43,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 00:11:43,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954690905] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:11:43,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:11:43,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 00:11:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031833061] [2023-02-14 00:11:43,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:11:43,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 00:11:43,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:11:43,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 00:11:43,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 00:11:43,591 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 00:11:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:11:43,605 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2023-02-14 00:11:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 00:11:43,607 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-14 00:11:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:11:43,611 INFO L225 Difference]: With dead ends: 61 [2023-02-14 00:11:43,611 INFO L226 Difference]: Without dead ends: 28 [2023-02-14 00:11:43,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 00:11:43,618 INFO L413 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:11:43,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:11:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-14 00:11:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-14 00:11:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 00:11:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-02-14 00:11:43,651 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2023-02-14 00:11:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:11:43,652 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-02-14 00:11:43,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 00:11:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-02-14 00:11:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 00:11:43,678 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:11:43,679 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:11:43,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 00:11:43,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-14 00:11:43,884 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:11:43,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:11:43,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2023-02-14 00:11:43,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:11:43,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796270906] [2023-02-14 00:11:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:43,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:11:43,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:11:43,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667335519] [2023-02-14 00:11:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:43,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:43,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:11:43,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:11:43,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 00:11:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:11:43,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 00:11:43,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:11:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:11:44,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 00:11:44,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:11:44,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796270906] [2023-02-14 00:11:44,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:11:44,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667335519] [2023-02-14 00:11:44,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667335519] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:11:44,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:11:44,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 00:11:44,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019958192] [2023-02-14 00:11:44,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:11:44,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 00:11:44,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:11:44,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 00:11:44,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 00:11:44,024 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 00:11:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:11:44,094 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2023-02-14 00:11:44,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 00:11:44,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-14 00:11:44,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:11:44,097 INFO L225 Difference]: With dead ends: 47 [2023-02-14 00:11:44,098 INFO L226 Difference]: Without dead ends: 40 [2023-02-14 00:11:44,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 00:11:44,101 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:11:44,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 104 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:11:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-14 00:11:44,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2023-02-14 00:11:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 00:11:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-02-14 00:11:44,110 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2023-02-14 00:11:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:11:44,111 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-02-14 00:11:44,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 00:11:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-02-14 00:11:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 00:11:44,111 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:11:44,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:11:44,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 00:11:44,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-14 00:11:44,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:11:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:11:44,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2023-02-14 00:11:44,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:11:44,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256085009] [2023-02-14 00:11:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:44,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:11:44,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:11:44,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407715835] [2023-02-14 00:11:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:44,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:44,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:11:44,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:11:44,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 00:11:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:11:44,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 00:11:44,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:11:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:11:44,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 00:11:44,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:11:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256085009] [2023-02-14 00:11:44,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:11:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407715835] [2023-02-14 00:11:44,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407715835] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:11:44,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:11:44,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 00:11:44,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653566320] [2023-02-14 00:11:44,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:11:44,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 00:11:44,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:11:44,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 00:11:44,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 00:11:44,612 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 00:11:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:11:44,715 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-14 00:11:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 00:11:44,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-02-14 00:11:44,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:11:44,717 INFO L225 Difference]: With dead ends: 46 [2023-02-14 00:11:44,717 INFO L226 Difference]: Without dead ends: 44 [2023-02-14 00:11:44,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-14 00:11:44,718 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 00:11:44,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 140 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 00:11:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-14 00:11:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-02-14 00:11:44,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 00:11:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2023-02-14 00:11:44,726 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2023-02-14 00:11:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:11:44,726 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2023-02-14 00:11:44,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 00:11:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2023-02-14 00:11:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 00:11:44,727 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:11:44,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:11:44,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 00:11:44,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:44,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:11:44,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:11:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2023-02-14 00:11:44,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:11:44,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536487829] [2023-02-14 00:11:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:44,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:11:44,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:11:44,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716559625] [2023-02-14 00:11:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:44,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:44,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:11:45,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:11:45,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 00:11:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:11:45,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 00:11:45,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:11:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:11:45,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:11:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:11:45,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:11:45,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536487829] [2023-02-14 00:11:45,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:11:45,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716559625] [2023-02-14 00:11:45,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716559625] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:11:45,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:11:45,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-14 00:11:45,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746973232] [2023-02-14 00:11:45,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:11:45,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 00:11:45,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:11:45,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 00:11:45,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 00:11:45,170 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 00:11:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:11:45,318 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2023-02-14 00:11:45,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 00:11:45,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-02-14 00:11:45,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:11:45,319 INFO L225 Difference]: With dead ends: 96 [2023-02-14 00:11:45,320 INFO L226 Difference]: Without dead ends: 89 [2023-02-14 00:11:45,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 00:11:45,321 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 64 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 00:11:45,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 193 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 00:11:45,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-14 00:11:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2023-02-14 00:11:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-14 00:11:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2023-02-14 00:11:45,332 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 24 [2023-02-14 00:11:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:11:45,332 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2023-02-14 00:11:45,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 00:11:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2023-02-14 00:11:45,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 00:11:45,333 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:11:45,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:11:45,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 00:11:45,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:45,542 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:11:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:11:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2023-02-14 00:11:45,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:11:45,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251216227] [2023-02-14 00:11:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:45,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:11:45,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:11:45,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061257117] [2023-02-14 00:11:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:45,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:45,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:11:45,566 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:11:45,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 00:11:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:11:45,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 00:11:45,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:11:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:11:45,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:11:48,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:11:48,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251216227] [2023-02-14 00:11:48,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:11:48,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061257117] [2023-02-14 00:11:48,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061257117] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:11:48,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 00:11:48,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-14 00:11:48,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426045712] [2023-02-14 00:11:48,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 00:11:48,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 00:11:48,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:11:48,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 00:11:48,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-02-14 00:11:48,572 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 00:11:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:11:48,835 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2023-02-14 00:11:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 00:11:48,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-02-14 00:11:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:11:48,837 INFO L225 Difference]: With dead ends: 79 [2023-02-14 00:11:48,837 INFO L226 Difference]: Without dead ends: 77 [2023-02-14 00:11:48,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-14 00:11:48,838 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 00:11:48,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 135 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 00:11:48,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-14 00:11:48,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2023-02-14 00:11:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-14 00:11:48,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2023-02-14 00:11:48,849 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 27 [2023-02-14 00:11:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:11:48,849 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2023-02-14 00:11:48,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 00:11:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2023-02-14 00:11:48,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 00:11:48,850 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:11:48,851 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:11:48,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 00:11:49,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:49,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:11:49,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:11:49,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2023-02-14 00:11:49,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:11:49,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145776904] [2023-02-14 00:11:49,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:49,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:11:49,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:11:49,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753665139] [2023-02-14 00:11:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:49,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:49,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:11:49,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:11:49,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 00:11:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:11:49,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 00:11:49,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:11:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:11:49,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:11:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 00:11:49,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:11:49,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145776904] [2023-02-14 00:11:49,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:11:49,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753665139] [2023-02-14 00:11:49,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753665139] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:11:49,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:11:49,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-02-14 00:11:49,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944818749] [2023-02-14 00:11:49,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:11:49,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 00:11:49,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:11:49,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 00:11:49,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-14 00:11:49,357 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 00:11:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:11:49,651 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2023-02-14 00:11:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 00:11:49,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-02-14 00:11:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:11:49,652 INFO L225 Difference]: With dead ends: 104 [2023-02-14 00:11:49,652 INFO L226 Difference]: Without dead ends: 102 [2023-02-14 00:11:49,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-14 00:11:49,653 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 41 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 00:11:49,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 253 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 00:11:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-14 00:11:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2023-02-14 00:11:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-14 00:11:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2023-02-14 00:11:49,669 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 27 [2023-02-14 00:11:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:11:49,669 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2023-02-14 00:11:49,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 00:11:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2023-02-14 00:11:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 00:11:49,670 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:11:49,670 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:11:49,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-14 00:11:49,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:49,875 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:11:49,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:11:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash -281586315, now seen corresponding path program 1 times [2023-02-14 00:11:49,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:11:49,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726596320] [2023-02-14 00:11:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:49,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:11:49,885 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:11:49,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504728489] [2023-02-14 00:11:49,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:49,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:49,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:11:49,886 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:11:49,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 00:11:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:11:49,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 00:11:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:11:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 00:11:49,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:11:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 00:11:50,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:11:50,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726596320] [2023-02-14 00:11:50,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:11:50,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504728489] [2023-02-14 00:11:50,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504728489] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 00:11:50,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 00:11:50,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-02-14 00:11:50,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247317928] [2023-02-14 00:11:50,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:11:50,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 00:11:50,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:11:50,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 00:11:50,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 00:11:50,039 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 00:11:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:11:50,088 INFO L93 Difference]: Finished difference Result 144 states and 204 transitions. [2023-02-14 00:11:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 00:11:50,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-14 00:11:50,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:11:50,090 INFO L225 Difference]: With dead ends: 144 [2023-02-14 00:11:50,090 INFO L226 Difference]: Without dead ends: 142 [2023-02-14 00:11:50,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 00:11:50,091 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:11:50,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:11:50,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-02-14 00:11:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2023-02-14 00:11:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 43 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-02-14 00:11:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 196 transitions. [2023-02-14 00:11:50,109 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 196 transitions. Word has length 32 [2023-02-14 00:11:50,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:11:50,110 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 196 transitions. [2023-02-14 00:11:50,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 00:11:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 196 transitions. [2023-02-14 00:11:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 00:11:50,111 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:11:50,117 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 00:11:50,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 00:11:50,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:50,322 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:11:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:11:50,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278097, now seen corresponding path program 1 times [2023-02-14 00:11:50,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:11:50,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577746049] [2023-02-14 00:11:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:50,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:11:50,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:11:50,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999263123] [2023-02-14 00:11:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:50,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:50,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:11:50,331 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:11:50,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 00:11:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:11:50,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-14 00:11:50,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:11:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:11:50,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:11:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 00:11:50,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:11:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577746049] [2023-02-14 00:11:50,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:11:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999263123] [2023-02-14 00:11:50,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999263123] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:11:50,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:11:50,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2023-02-14 00:11:50,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836663330] [2023-02-14 00:11:50,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:11:50,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 00:11:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:11:50,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 00:11:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-02-14 00:11:50,786 INFO L87 Difference]: Start difference. First operand 136 states and 196 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 00:11:56,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:11:56,728 INFO L93 Difference]: Finished difference Result 183 states and 256 transitions. [2023-02-14 00:11:56,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 00:11:56,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-02-14 00:11:56,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:11:56,733 INFO L225 Difference]: With dead ends: 183 [2023-02-14 00:11:56,733 INFO L226 Difference]: Without dead ends: 181 [2023-02-14 00:11:56,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 00:11:56,735 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 155 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-14 00:11:56,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 138 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-14 00:11:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-14 00:11:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 168. [2023-02-14 00:11:56,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.2636363636363637) internal successors, (139), 114 states have internal predecessors, (139), 49 states have call successors, (49), 8 states have call predecessors, (49), 8 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2023-02-14 00:11:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 236 transitions. [2023-02-14 00:11:56,817 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 236 transitions. Word has length 32 [2023-02-14 00:11:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:11:56,817 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 236 transitions. [2023-02-14 00:11:56,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 00:11:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 236 transitions. [2023-02-14 00:11:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 00:11:56,821 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:11:56,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:11:56,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 00:11:57,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-14 00:11:57,026 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:11:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:11:57,026 INFO L85 PathProgramCache]: Analyzing trace with hash 492814709, now seen corresponding path program 2 times [2023-02-14 00:11:57,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:11:57,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12855617] [2023-02-14 00:11:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:57,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:11:57,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:11:57,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745513236] [2023-02-14 00:11:57,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 00:11:57,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:57,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:11:57,049 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:11:57,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 00:11:57,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 00:11:57,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:11:57,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 00:11:57,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:11:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 00:11:57,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 00:11:57,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:11:57,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12855617] [2023-02-14 00:11:57,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:11:57,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745513236] [2023-02-14 00:11:57,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745513236] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:11:57,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:11:57,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 00:11:57,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101202976] [2023-02-14 00:11:57,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:11:57,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 00:11:57,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:11:57,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 00:11:57,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 00:11:57,103 INFO L87 Difference]: Start difference. First operand 168 states and 236 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 00:11:57,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:11:57,196 INFO L93 Difference]: Finished difference Result 214 states and 296 transitions. [2023-02-14 00:11:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 00:11:57,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-02-14 00:11:57,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:11:57,197 INFO L225 Difference]: With dead ends: 214 [2023-02-14 00:11:57,197 INFO L226 Difference]: Without dead ends: 133 [2023-02-14 00:11:57,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 00:11:57,202 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 00:11:57,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 00:11:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-14 00:11:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2023-02-14 00:11:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 73 states have internal predecessors, (83), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-14 00:11:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 144 transitions. [2023-02-14 00:11:57,227 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 144 transitions. Word has length 32 [2023-02-14 00:11:57,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:11:57,228 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 144 transitions. [2023-02-14 00:11:57,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 00:11:57,228 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 144 transitions. [2023-02-14 00:11:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 00:11:57,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:11:57,231 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:11:57,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 00:11:57,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:57,436 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:11:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:11:57,437 INFO L85 PathProgramCache]: Analyzing trace with hash -449167720, now seen corresponding path program 1 times [2023-02-14 00:11:57,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:11:57,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421650105] [2023-02-14 00:11:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:57,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:11:57,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:11:57,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866342833] [2023-02-14 00:11:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:57,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:57,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:11:57,445 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:11:57,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 00:11:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:11:57,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 00:11:57,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:11:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 00:11:57,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:11:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 00:11:57,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:11:57,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421650105] [2023-02-14 00:11:57,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:11:57,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866342833] [2023-02-14 00:11:57,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866342833] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 00:11:57,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 00:11:57,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-14 00:11:57,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369402558] [2023-02-14 00:11:57,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:11:57,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 00:11:57,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:11:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 00:11:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 00:11:57,732 INFO L87 Difference]: Start difference. First operand 110 states and 144 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) [2023-02-14 00:11:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:11:57,781 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2023-02-14 00:11:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 00:11:57,782 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 [2023-02-14 00:11:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:11:57,783 INFO L225 Difference]: With dead ends: 116 [2023-02-14 00:11:57,783 INFO L226 Difference]: Without dead ends: 114 [2023-02-14 00:11:57,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 00:11:57,784 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:11:57,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 102 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:11:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-14 00:11:57,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-02-14 00:11:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 73 states have (on average 1.178082191780822) internal successors, (86), 76 states have internal predecessors, (86), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-14 00:11:57,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2023-02-14 00:11:57,804 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 37 [2023-02-14 00:11:57,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:11:57,804 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2023-02-14 00:11:57,804 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) [2023-02-14 00:11:57,805 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2023-02-14 00:11:57,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 00:11:57,805 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:11:57,805 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2023-02-14 00:11:57,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 00:11:58,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 00:11:58,011 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:11:58,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:11:58,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1289603446, now seen corresponding path program 1 times [2023-02-14 00:11:58,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:11:58,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420278563] [2023-02-14 00:11:58,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:58,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:11:58,018 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:11:58,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271641503] [2023-02-14 00:11:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:11:58,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:11:58,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:11:58,045 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:11:58,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 00:11:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:11:58,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-14 00:11:58,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:11:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 00:11:58,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:11:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-14 00:11:59,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:11:59,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420278563] [2023-02-14 00:11:59,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:11:59,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271641503] [2023-02-14 00:11:59,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271641503] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:11:59,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:11:59,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-02-14 00:11:59,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080017284] [2023-02-14 00:11:59,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:11:59,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 00:11:59,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:11:59,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 00:11:59,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-02-14 00:11:59,411 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 00:12:10,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:12:10,038 INFO L93 Difference]: Finished difference Result 334 states and 463 transitions. [2023-02-14 00:12:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-14 00:12:10,039 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 49 [2023-02-14 00:12:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:12:10,041 INFO L225 Difference]: With dead ends: 334 [2023-02-14 00:12:10,041 INFO L226 Difference]: Without dead ends: 246 [2023-02-14 00:12:10,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2023-02-14 00:12:10,042 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 165 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:12:10,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 238 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-02-14 00:12:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-14 00:12:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 203. [2023-02-14 00:12:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 137 states have internal predecessors, (159), 55 states have call successors, (55), 13 states have call predecessors, (55), 13 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-14 00:12:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 268 transitions. [2023-02-14 00:12:10,127 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 268 transitions. Word has length 49 [2023-02-14 00:12:10,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:12:10,128 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 268 transitions. [2023-02-14 00:12:10,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 00:12:10,128 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 268 transitions. [2023-02-14 00:12:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 00:12:10,129 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:12:10,129 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 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] [2023-02-14 00:12:10,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-14 00:12:10,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 00:12:10,334 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:12:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:12:10,335 INFO L85 PathProgramCache]: Analyzing trace with hash -70799180, now seen corresponding path program 1 times [2023-02-14 00:12:10,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:12:10,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655140236] [2023-02-14 00:12:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:12:10,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:12:10,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:12:10,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91098328] [2023-02-14 00:12:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:12:10,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:12:10,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:12:10,356 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:12:10,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 00:12:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:12:10,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 00:12:10,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:12:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 00:12:11,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:12:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-14 00:12:11,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:12:11,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655140236] [2023-02-14 00:12:11,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:12:11,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91098328] [2023-02-14 00:12:11,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91098328] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:12:11,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:12:11,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-02-14 00:12:11,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479535572] [2023-02-14 00:12:11,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:12:11,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 00:12:11,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:12:11,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 00:12:11,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-02-14 00:12:11,548 INFO L87 Difference]: Start difference. First operand 203 states and 268 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 00:12:48,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:13:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:13:10,257 INFO L93 Difference]: Finished difference Result 327 states and 457 transitions. [2023-02-14 00:13:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-14 00:13:10,258 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 57 [2023-02-14 00:13:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:13:10,259 INFO L225 Difference]: With dead ends: 327 [2023-02-14 00:13:10,259 INFO L226 Difference]: Without dead ends: 325 [2023-02-14 00:13:10,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=671, Invalid=2988, Unknown=1, NotChecked=0, Total=3660 [2023-02-14 00:13:10,261 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 155 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2023-02-14 00:13:10,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 384 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 18.1s Time] [2023-02-14 00:13:10,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-02-14 00:13:10,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 211. [2023-02-14 00:13:10,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 140 states have (on average 1.1785714285714286) internal successors, (165), 143 states have internal predecessors, (165), 55 states have call successors, (55), 15 states have call predecessors, (55), 15 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-14 00:13:10,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 274 transitions. [2023-02-14 00:13:10,329 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 274 transitions. Word has length 57 [2023-02-14 00:13:10,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:13:10,330 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 274 transitions. [2023-02-14 00:13:10,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 00:13:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 274 transitions. [2023-02-14 00:13:10,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-14 00:13:10,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:13:10,331 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 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] [2023-02-14 00:13:10,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 00:13:10,551 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 [2023-02-14 00:13:10,552 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:13:10,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:13:10,552 INFO L85 PathProgramCache]: Analyzing trace with hash 513336511, now seen corresponding path program 2 times [2023-02-14 00:13:10,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:13:10,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633017665] [2023-02-14 00:13:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:13:10,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:13:10,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:13:10,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075812826] [2023-02-14 00:13:10,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 00:13:10,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:13:10,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:13:10,574 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) [2023-02-14 00:13:10,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 00:13:10,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 00:13:10,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:13:10,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 00:13:10,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:13:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 00:13:10,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 00:13:10,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:13:10,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633017665] [2023-02-14 00:13:10,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:13:10,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075812826] [2023-02-14 00:13:10,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075812826] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:13:10,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:13:10,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 00:13:10,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034699231] [2023-02-14 00:13:10,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:13:10,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 00:13:10,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:13:10,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 00:13:10,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 00:13:10,683 INFO L87 Difference]: Start difference. First operand 211 states and 274 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-14 00:13:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:13:10,801 INFO L93 Difference]: Finished difference Result 383 states and 514 transitions. [2023-02-14 00:13:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 00:13:10,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2023-02-14 00:13:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:13:10,803 INFO L225 Difference]: With dead ends: 383 [2023-02-14 00:13:10,803 INFO L226 Difference]: Without dead ends: 253 [2023-02-14 00:13:10,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 00:13:10,804 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:13:10,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:13:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-02-14 00:13:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 244. [2023-02-14 00:13:10,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 157 states have internal predecessors, (182), 73 states have call successors, (73), 15 states have call predecessors, (73), 15 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-14 00:13:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 327 transitions. [2023-02-14 00:13:10,894 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 327 transitions. Word has length 62 [2023-02-14 00:13:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:13:10,894 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 327 transitions. [2023-02-14 00:13:10,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-14 00:13:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 327 transitions. [2023-02-14 00:13:10,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-14 00:13:10,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:13:10,895 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 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] [2023-02-14 00:13:10,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 00:13:11,100 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 [2023-02-14 00:13:11,100 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:13:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:13:11,101 INFO L85 PathProgramCache]: Analyzing trace with hash -420355271, now seen corresponding path program 3 times [2023-02-14 00:13:11,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:13:11,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978229799] [2023-02-14 00:13:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:13:11,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:13:11,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:13:11,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710017658] [2023-02-14 00:13:11,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 00:13:11,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:13:11,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:13:11,108 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) [2023-02-14 00:13:11,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 00:13:11,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 00:13:11,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:13:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-14 00:13:11,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:13:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 00:13:11,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:13:12,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:13:12,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978229799] [2023-02-14 00:13:12,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:13:12,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710017658] [2023-02-14 00:13:12,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710017658] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:13:12,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 00:13:12,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-14 00:13:12,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118911044] [2023-02-14 00:13:12,548 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 00:13:12,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 00:13:12,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:13:12,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 00:13:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-02-14 00:13:12,550 INFO L87 Difference]: Start difference. First operand 244 states and 327 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-14 00:13:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:13:13,505 INFO L93 Difference]: Finished difference Result 334 states and 452 transitions. [2023-02-14 00:13:13,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 00:13:13,505 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 62 [2023-02-14 00:13:13,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:13:13,507 INFO L225 Difference]: With dead ends: 334 [2023-02-14 00:13:13,507 INFO L226 Difference]: Without dead ends: 332 [2023-02-14 00:13:13,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-02-14 00:13:13,508 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 62 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 00:13:13,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 264 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 00:13:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-02-14 00:13:13,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 323. [2023-02-14 00:13:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 199 states have (on average 1.185929648241206) internal successors, (236), 200 states have internal predecessors, (236), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-02-14 00:13:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 441 transitions. [2023-02-14 00:13:13,625 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 441 transitions. Word has length 62 [2023-02-14 00:13:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:13:13,626 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 441 transitions. [2023-02-14 00:13:13,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-14 00:13:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 441 transitions. [2023-02-14 00:13:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 00:13:13,627 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:13:13,627 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 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] [2023-02-14 00:13:13,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 00:13:13,832 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 [2023-02-14 00:13:13,833 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:13:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:13:13,833 INFO L85 PathProgramCache]: Analyzing trace with hash -819166674, now seen corresponding path program 1 times [2023-02-14 00:13:13,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:13:13,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167020040] [2023-02-14 00:13:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:13:13,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:13:13,844 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:13:13,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043420734] [2023-02-14 00:13:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:13:13,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:13:13,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:13:13,845 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) [2023-02-14 00:13:13,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 00:13:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:13:13,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-14 00:13:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:13:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-14 00:13:14,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:13:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-14 00:13:25,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:13:25,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167020040] [2023-02-14 00:13:25,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:13:25,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043420734] [2023-02-14 00:13:25,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043420734] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:13:25,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:13:25,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2023-02-14 00:13:25,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565102047] [2023-02-14 00:13:25,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:13:25,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-14 00:13:25,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:13:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-14 00:13:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 00:13:25,065 INFO L87 Difference]: Start difference. First operand 323 states and 441 transitions. Second operand has 35 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-14 00:13:43,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:14:03,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:14:08,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:14:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:14:47,872 INFO L93 Difference]: Finished difference Result 527 states and 737 transitions. [2023-02-14 00:14:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-14 00:14:47,873 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 76 [2023-02-14 00:14:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:14:47,893 INFO L225 Difference]: With dead ends: 527 [2023-02-14 00:14:47,894 INFO L226 Difference]: Without dead ends: 523 [2023-02-14 00:14:47,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3703 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=2177, Invalid=10255, Unknown=0, NotChecked=0, Total=12432 [2023-02-14 00:14:47,896 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 374 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 3293 mSolverCounterSat, 717 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 4011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 3293 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.8s IncrementalHoareTripleChecker+Time [2023-02-14 00:14:47,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 594 Invalid, 4011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 3293 Invalid, 1 Unknown, 0 Unchecked, 34.8s Time] [2023-02-14 00:14:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-02-14 00:14:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 458. [2023-02-14 00:14:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 281 states have (on average 1.206405693950178) internal successors, (339), 282 states have internal predecessors, (339), 151 states have call successors, (151), 25 states have call predecessors, (151), 25 states have return successors, (150), 150 states have call predecessors, (150), 150 states have call successors, (150) [2023-02-14 00:14:48,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 640 transitions. [2023-02-14 00:14:48,218 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 640 transitions. Word has length 76 [2023-02-14 00:14:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:14:48,218 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 640 transitions. [2023-02-14 00:14:48,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-14 00:14:48,218 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 640 transitions. [2023-02-14 00:14:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-14 00:14:48,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:14:48,219 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:14:48,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 00:14:48,424 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 [2023-02-14 00:14:48,424 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:14:48,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:14:48,425 INFO L85 PathProgramCache]: Analyzing trace with hash 685229769, now seen corresponding path program 1 times [2023-02-14 00:14:48,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:14:48,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707404023] [2023-02-14 00:14:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:14:48,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:14:48,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:14:48,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494579391] [2023-02-14 00:14:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:14:48,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:14:48,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:14:48,432 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) [2023-02-14 00:14:48,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 00:14:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:14:48,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 00:14:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:14:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-02-14 00:14:48,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:14:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-02-14 00:14:49,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:14:49,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707404023] [2023-02-14 00:14:49,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:14:49,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494579391] [2023-02-14 00:14:49,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494579391] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:14:49,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:14:49,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-14 00:14:49,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862707250] [2023-02-14 00:14:49,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:14:49,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 00:14:49,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:14:49,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 00:14:49,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-14 00:14:49,533 INFO L87 Difference]: Start difference. First operand 458 states and 640 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 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) [2023-02-14 00:14:52,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:14:52,341 INFO L93 Difference]: Finished difference Result 975 states and 1492 transitions. [2023-02-14 00:14:52,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 00:14:52,341 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 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 79 [2023-02-14 00:14:52,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:14:52,345 INFO L225 Difference]: With dead ends: 975 [2023-02-14 00:14:52,345 INFO L226 Difference]: Without dead ends: 973 [2023-02-14 00:14:52,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 00:14:52,347 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 175 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:14:52,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 475 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 00:14:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2023-02-14 00:14:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 890. [2023-02-14 00:14:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 454 states have (on average 1.2951541850220265) internal successors, (588), 455 states have internal predecessors, (588), 407 states have call successors, (407), 28 states have call predecessors, (407), 28 states have return successors, (406), 406 states have call predecessors, (406), 406 states have call successors, (406) [2023-02-14 00:14:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1401 transitions. [2023-02-14 00:14:53,093 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1401 transitions. Word has length 79 [2023-02-14 00:14:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:14:53,093 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1401 transitions. [2023-02-14 00:14:53,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 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) [2023-02-14 00:14:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1401 transitions. [2023-02-14 00:14:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-14 00:14:53,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:14:53,095 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 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] [2023-02-14 00:14:53,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 00:14:53,299 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 [2023-02-14 00:14:53,299 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:14:53,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:14:53,300 INFO L85 PathProgramCache]: Analyzing trace with hash -248462013, now seen corresponding path program 1 times [2023-02-14 00:14:53,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:14:53,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044645565] [2023-02-14 00:14:53,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:14:53,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:14:53,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:14:53,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895124397] [2023-02-14 00:14:53,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:14:53,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:14:53,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:14:53,311 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) [2023-02-14 00:14:53,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 00:14:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:14:53,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-14 00:14:53,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:14:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-14 00:14:53,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:14:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-14 00:14:54,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:14:54,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044645565] [2023-02-14 00:14:54,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:14:54,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895124397] [2023-02-14 00:14:54,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895124397] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:14:54,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:14:54,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-02-14 00:14:54,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181658297] [2023-02-14 00:14:54,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:14:54,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 00:14:54,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:14:54,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 00:14:54,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-02-14 00:14:54,635 INFO L87 Difference]: Start difference. First operand 890 states and 1401 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-14 00:15:04,585 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 [] [2023-02-14 00:15:17,249 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 [] [2023-02-14 00:15:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:15:34,160 INFO L93 Difference]: Finished difference Result 1289 states and 2039 transitions. [2023-02-14 00:15:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-14 00:15:34,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 79 [2023-02-14 00:15:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:15:34,165 INFO L225 Difference]: With dead ends: 1289 [2023-02-14 00:15:34,165 INFO L226 Difference]: Without dead ends: 1287 [2023-02-14 00:15:34,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=815, Invalid=3216, Unknown=1, NotChecked=0, Total=4032 [2023-02-14 00:15:34,167 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 209 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 386 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2023-02-14 00:15:34,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 504 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 1402 Invalid, 2 Unknown, 0 Unchecked, 16.9s Time] [2023-02-14 00:15:34,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2023-02-14 00:15:35,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1158. [2023-02-14 00:15:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 589 states have (on average 1.300509337860781) internal successors, (766), 590 states have internal predecessors, (766), 535 states have call successors, (535), 33 states have call predecessors, (535), 33 states have return successors, (534), 534 states have call predecessors, (534), 534 states have call successors, (534) [2023-02-14 00:15:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1835 transitions. [2023-02-14 00:15:35,250 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1835 transitions. Word has length 79 [2023-02-14 00:15:35,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:15:35,251 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 1835 transitions. [2023-02-14 00:15:35,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-14 00:15:35,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1835 transitions. [2023-02-14 00:15:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-14 00:15:35,252 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:15:35,252 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:15:35,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-14 00:15:35,456 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 [2023-02-14 00:15:35,457 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:15:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:15:35,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1959088841, now seen corresponding path program 2 times [2023-02-14 00:15:35,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:15:35,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5190995] [2023-02-14 00:15:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:15:35,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:15:35,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:15:35,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133753778] [2023-02-14 00:15:35,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 00:15:35,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:15:35,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:15:35,464 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) [2023-02-14 00:15:35,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 00:15:35,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 00:15:35,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:15:35,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 00:15:35,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:15:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-14 00:15:35,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:15:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-14 00:15:35,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:15:35,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5190995] [2023-02-14 00:15:35,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:15:35,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133753778] [2023-02-14 00:15:35,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133753778] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:15:35,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:15:35,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-02-14 00:15:35,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948199438] [2023-02-14 00:15:35,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:15:35,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 00:15:35,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:15:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 00:15:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-14 00:15:35,646 INFO L87 Difference]: Start difference. First operand 1158 states and 1835 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-14 00:15:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:15:37,317 INFO L93 Difference]: Finished difference Result 1328 states and 2095 transitions. [2023-02-14 00:15:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 00:15:37,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 84 [2023-02-14 00:15:37,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:15:37,323 INFO L225 Difference]: With dead ends: 1328 [2023-02-14 00:15:37,323 INFO L226 Difference]: Without dead ends: 1321 [2023-02-14 00:15:37,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 157 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2023-02-14 00:15:37,324 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 81 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 00:15:37,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 315 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 00:15:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2023-02-14 00:15:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1127. [2023-02-14 00:15:38,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 566 states have (on average 1.3074204946996466) internal successors, (740), 567 states have internal predecessors, (740), 527 states have call successors, (527), 33 states have call predecessors, (527), 33 states have return successors, (526), 526 states have call predecessors, (526), 526 states have call successors, (526) [2023-02-14 00:15:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1793 transitions. [2023-02-14 00:15:38,409 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1793 transitions. Word has length 84 [2023-02-14 00:15:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:15:38,409 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 1793 transitions. [2023-02-14 00:15:38,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-14 00:15:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1793 transitions. [2023-02-14 00:15:38,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-14 00:15:38,410 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:15:38,410 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:15:38,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-14 00:15:38,615 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 [2023-02-14 00:15:38,615 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:15:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:15:38,615 INFO L85 PathProgramCache]: Analyzing trace with hash -437420468, now seen corresponding path program 4 times [2023-02-14 00:15:38,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:15:38,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41094567] [2023-02-14 00:15:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:15:38,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:15:38,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:15:38,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771048466] [2023-02-14 00:15:38,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 00:15:38,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:15:38,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:15:38,622 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) [2023-02-14 00:15:38,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 00:15:38,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 00:15:38,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:15:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-14 00:15:38,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:15:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 52 proven. 51 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-14 00:15:39,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:15:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 44 proven. 38 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-14 00:15:41,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:15:41,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41094567] [2023-02-14 00:15:41,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:15:41,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771048466] [2023-02-14 00:15:41,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771048466] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:15:41,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:15:41,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 36 [2023-02-14 00:15:41,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943977040] [2023-02-14 00:15:41,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:15:41,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-14 00:15:41,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:15:41,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-14 00:15:41,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 00:15:41,177 INFO L87 Difference]: Start difference. First operand 1127 states and 1793 transitions. Second operand has 36 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 31 states have internal predecessors, (73), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2023-02-14 00:15:59,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:16:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:16:00,628 INFO L93 Difference]: Finished difference Result 1314 states and 2053 transitions. [2023-02-14 00:16:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-14 00:16:00,628 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 31 states have internal predecessors, (73), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 87 [2023-02-14 00:16:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:16:00,650 INFO L225 Difference]: With dead ends: 1314 [2023-02-14 00:16:00,650 INFO L226 Difference]: Without dead ends: 1312 [2023-02-14 00:16:00,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=764, Invalid=3396, Unknown=0, NotChecked=0, Total=4160 [2023-02-14 00:16:00,665 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 293 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-02-14 00:16:00,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 380 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-02-14 00:16:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2023-02-14 00:16:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1289. [2023-02-14 00:16:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 659 states have (on average 1.291350531107739) internal successors, (851), 663 states have internal predecessors, (851), 589 states have call successors, (589), 40 states have call predecessors, (589), 40 states have return successors, (588), 585 states have call predecessors, (588), 588 states have call successors, (588) [2023-02-14 00:16:01,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 2028 transitions. [2023-02-14 00:16:01,984 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 2028 transitions. Word has length 87 [2023-02-14 00:16:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:16:01,984 INFO L495 AbstractCegarLoop]: Abstraction has 1289 states and 2028 transitions. [2023-02-14 00:16:01,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 31 states have internal predecessors, (73), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2023-02-14 00:16:01,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 2028 transitions. [2023-02-14 00:16:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-14 00:16:01,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:16:01,987 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:16:02,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 00:16:02,191 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 [2023-02-14 00:16:02,191 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:16:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:16:02,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1810606754, now seen corresponding path program 2 times [2023-02-14 00:16:02,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:16:02,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163626145] [2023-02-14 00:16:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:16:02,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:16:02,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:16:02,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992040122] [2023-02-14 00:16:02,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 00:16:02,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:16:02,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:16:02,203 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) [2023-02-14 00:16:02,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 00:16:02,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 00:16:02,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:16:02,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-14 00:16:02,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:16:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 53 proven. 34 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-02-14 00:16:03,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:16:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 50 proven. 34 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-02-14 00:16:08,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:16:08,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163626145] [2023-02-14 00:16:08,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:16:08,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992040122] [2023-02-14 00:16:08,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992040122] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:16:08,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:16:08,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-14 00:16:08,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830761749] [2023-02-14 00:16:08,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:16:08,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-14 00:16:08,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:16:08,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-14 00:16:08,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-02-14 00:16:08,719 INFO L87 Difference]: Start difference. First operand 1289 states and 2028 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27)