./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.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 9e9911e775b3214ba13077b05d83e9364947724e9afa3bb89f51b07ee325bd90 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:41:49,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:41:49,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:41:49,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:41:49,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:41:49,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:41:49,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:41:49,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:41:49,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:41:49,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:41:49,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:41:49,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:41:49,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:41:49,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:41:49,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:41:49,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:41:49,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:41:49,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:41:49,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:41:49,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:41:49,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:41:49,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:41:49,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:41:49,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:41:49,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:41:49,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:41:49,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:41:49,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:41:49,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:41:49,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:41:49,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:41:49,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:41:49,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:41:49,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:41:49,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:41:49,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:41:49,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:41:49,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:41:49,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:41:49,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:41:49,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:41:49,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:41:49,106 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:41:49,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:41:49,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:41:49,112 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:41:49,113 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:41:49,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:41:49,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:41:49,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:41:49,113 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:41:49,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:41:49,114 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:41:49,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:41:49,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:41:49,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:41:49,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:41:49,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:41:49,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:41:49,115 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:41:49,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:41:49,115 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:41:49,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:41:49,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:41:49,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:41:49,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:41:49,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:41:49,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:41:49,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:41:49,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:41:49,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:41:49,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:41:49,117 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:41:49,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:41:49,118 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:41:49,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:41:49,118 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:41:49,118 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e9911e775b3214ba13077b05d83e9364947724e9afa3bb89f51b07ee325bd90 [2023-02-15 20:41:49,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:41:49,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:41:49,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:41:49,336 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:41:49,336 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:41:49,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2023-02-15 20:41:50,313 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:41:50,465 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:41:50,465 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2023-02-15 20:41:50,469 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e493d6d7e/4dac50d27e0048cb9734a85da2f95fb8/FLAG69a2b3331 [2023-02-15 20:41:50,479 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e493d6d7e/4dac50d27e0048cb9734a85da2f95fb8 [2023-02-15 20:41:50,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:41:50,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:41:50,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:41:50,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:41:50,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:41:50,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49c6285f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50, skipping insertion in model container [2023-02-15 20:41:50,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:41:50,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:41:50,586 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c[490,503] [2023-02-15 20:41:50,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:41:50,604 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:41:50,612 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c[490,503] [2023-02-15 20:41:50,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:41:50,629 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:41:50,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50 WrapperNode [2023-02-15 20:41:50,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:41:50,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:41:50,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:41:50,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:41:50,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,651 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2023-02-15 20:41:50,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:41:50,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:41:50,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:41:50,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:41:50,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,663 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:41:50,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:41:50,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:41:50,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:41:50,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50" (1/1) ... [2023-02-15 20:41:50,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:41:50,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:50,710 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) [2023-02-15 20:41:50,714 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 [2023-02-15 20:41:50,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:41:50,735 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 20:41:50,735 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 20:41:50,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:41:50,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:41:50,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:41:50,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 20:41:50,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 20:41:50,775 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:41:50,777 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:41:50,878 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:41:50,884 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:41:50,884 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 20:41:50,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:41:50 BoogieIcfgContainer [2023-02-15 20:41:50,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:41:50,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:41:50,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:41:50,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:41:50,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:41:50" (1/3) ... [2023-02-15 20:41:50,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2788a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:41:50, skipping insertion in model container [2023-02-15 20:41:50,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:41:50" (2/3) ... [2023-02-15 20:41:50,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2788a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:41:50, skipping insertion in model container [2023-02-15 20:41:50,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:41:50" (3/3) ... [2023-02-15 20:41:50,891 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2023-02-15 20:41:50,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:41:50,903 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:41:50,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:41:50,948 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;@5426cd80, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:41:50,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:41:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 20:41:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 20:41:50,957 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:50,957 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:50,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:50,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2023-02-15 20:41:50,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:50,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38740524] [2023-02-15 20:41:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:50,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:51,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:51,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38740524] [2023-02-15 20:41:51,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 20:41:51,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877945277] [2023-02-15 20:41:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:51,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:51,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:51,105 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) [2023-02-15 20:41:51,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 20:41:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:51,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 20:41:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 20:41:51,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:41:51,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877945277] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:41:51,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:41:51,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 20:41:51,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760058270] [2023-02-15 20:41:51,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:41:51,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 20:41:51,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:51,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 20:41:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:41:51,284 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:41:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:51,311 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2023-02-15 20:41:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 20:41:51,313 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-02-15 20:41:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:51,318 INFO L225 Difference]: With dead ends: 65 [2023-02-15 20:41:51,318 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 20:41:51,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:41:51,326 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:51,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:41:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 20:41:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-15 20:41:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:41:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-02-15 20:41:51,357 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2023-02-15 20:41:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:51,357 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-02-15 20:41:51,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:41:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-02-15 20:41:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 20:41:51,360 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:51,360 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:51,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 20:41:51,565 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 [2023-02-15 20:41:51,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:51,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:51,567 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2023-02-15 20:41:51,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:51,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365097303] [2023-02-15 20:41:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:51,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:51,598 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:51,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312806497] [2023-02-15 20:41:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:51,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:51,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:51,600 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) [2023-02-15 20:41:51,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 20:41:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:51,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 20:41:51,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:41:51,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:41:51,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:51,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365097303] [2023-02-15 20:41:51,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:51,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312806497] [2023-02-15 20:41:51,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312806497] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:41:51,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:41:51,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:41:51,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781922069] [2023-02-15 20:41:51,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:41:51,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:41:51,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:41:51,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:41:51,767 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:41:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:51,779 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2023-02-15 20:41:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:41:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-02-15 20:41:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:51,780 INFO L225 Difference]: With dead ends: 40 [2023-02-15 20:41:51,780 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 20:41:51,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:41:51,781 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:51,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:41:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 20:41:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-15 20:41:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:41:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-02-15 20:41:51,788 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2023-02-15 20:41:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:51,789 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-02-15 20:41:51,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:41:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-02-15 20:41:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 20:41:51,790 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:51,790 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:51,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 20:41:51,994 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 [2023-02-15 20:41:51,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:51,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:51,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2023-02-15 20:41:51,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:51,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803243540] [2023-02-15 20:41:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:51,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:52,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:52,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970691598] [2023-02-15 20:41:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:52,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:52,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:52,029 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) [2023-02-15 20:41:52,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 20:41:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:52,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:41:52,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:41:52,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:41:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:41:52,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:52,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803243540] [2023-02-15 20:41:52,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:52,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970691598] [2023-02-15 20:41:52,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970691598] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:41:52,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:41:52,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-15 20:41:52,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775091256] [2023-02-15 20:41:52,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:41:52,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 20:41:52,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:52,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 20:41:52,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:41:52,281 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:41:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:52,399 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2023-02-15 20:41:52,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:41:52,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-02-15 20:41:52,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:52,400 INFO L225 Difference]: With dead ends: 49 [2023-02-15 20:41:52,400 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 20:41:52,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:41:52,401 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:52,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 92 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:41:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 20:41:52,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2023-02-15 20:41:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:41:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-15 20:41:52,414 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 30 [2023-02-15 20:41:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:52,415 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-15 20:41:52,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:41:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-15 20:41:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 20:41:52,416 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:52,416 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:52,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 20:41:52,627 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 [2023-02-15 20:41:52,627 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:52,628 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2023-02-15 20:41:52,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:52,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751806154] [2023-02-15 20:41:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:52,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:52,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:52,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671683915] [2023-02-15 20:41:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:52,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:52,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:52,652 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) [2023-02-15 20:41:52,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 20:41:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:52,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 20:41:52,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:41:52,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:41:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:41:52,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:52,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751806154] [2023-02-15 20:41:52,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:52,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671683915] [2023-02-15 20:41:52,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671683915] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:41:52,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:41:52,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-15 20:41:52,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487267027] [2023-02-15 20:41:52,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:41:52,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:41:52,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:41:52,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:41:52,880 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:41:52,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:52,917 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-02-15 20:41:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:41:52,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-02-15 20:41:52,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:52,919 INFO L225 Difference]: With dead ends: 39 [2023-02-15 20:41:52,919 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 20:41:52,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:41:52,920 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:52,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 114 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:41:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 20:41:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-15 20:41:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:41:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-02-15 20:41:52,927 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 32 [2023-02-15 20:41:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:52,927 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-02-15 20:41:52,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:41:52,928 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-02-15 20:41:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:41:52,928 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:52,929 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:52,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 20:41:53,133 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 [2023-02-15 20:41:53,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:53,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:53,134 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2023-02-15 20:41:53,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:53,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67908156] [2023-02-15 20:41:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:53,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:53,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:53,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326377278] [2023-02-15 20:41:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:53,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:53,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:53,165 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) [2023-02-15 20:41:53,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 20:41:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:53,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 20:41:53,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:41:53,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:41:53,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:53,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67908156] [2023-02-15 20:41:53,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:53,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326377278] [2023-02-15 20:41:53,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326377278] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:41:53,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:41:53,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 20:41:53,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440372005] [2023-02-15 20:41:53,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:41:53,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:41:53,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:53,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:41:53,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:41:53,245 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:41:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:53,258 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2023-02-15 20:41:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 20:41:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2023-02-15 20:41:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:53,259 INFO L225 Difference]: With dead ends: 62 [2023-02-15 20:41:53,260 INFO L226 Difference]: Without dead ends: 39 [2023-02-15 20:41:53,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:41:53,261 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:53,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:41:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-15 20:41:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-15 20:41:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:41:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-02-15 20:41:53,267 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 35 [2023-02-15 20:41:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:53,267 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-02-15 20:41:53,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:41:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-02-15 20:41:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 20:41:53,268 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:53,269 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:53,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 20:41:53,473 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 [2023-02-15 20:41:53,474 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:53,474 INFO L85 PathProgramCache]: Analyzing trace with hash 433790877, now seen corresponding path program 1 times [2023-02-15 20:41:53,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:53,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681914712] [2023-02-15 20:41:53,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:53,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:53,488 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:53,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78428067] [2023-02-15 20:41:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:53,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:53,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:53,517 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) [2023-02-15 20:41:53,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 20:41:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:53,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 20:41:53,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:41:53,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:41:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:41:53,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:53,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681914712] [2023-02-15 20:41:53,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:53,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78428067] [2023-02-15 20:41:53,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78428067] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:41:53,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:41:53,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-15 20:41:53,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835775687] [2023-02-15 20:41:53,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:41:53,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:41:53,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:53,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:41:53,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:41:53,794 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 20:41:53,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:53,830 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2023-02-15 20:41:53,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:41:53,830 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 [2023-02-15 20:41:53,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:53,831 INFO L225 Difference]: With dead ends: 53 [2023-02-15 20:41:53,831 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 20:41:53,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:41:53,832 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:53,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:41:53,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 20:41:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-02-15 20:41:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 20:41:53,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2023-02-15 20:41:53,841 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 37 [2023-02-15 20:41:53,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:53,841 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2023-02-15 20:41:53,841 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) [2023-02-15 20:41:53,841 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2023-02-15 20:41:53,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 20:41:53,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:53,842 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:53,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 20:41:54,046 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 [2023-02-15 20:41:54,047 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:54,047 INFO L85 PathProgramCache]: Analyzing trace with hash -553232285, now seen corresponding path program 1 times [2023-02-15 20:41:54,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:54,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28731736] [2023-02-15 20:41:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:54,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:54,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:54,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828852035] [2023-02-15 20:41:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:54,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:54,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:54,055 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) [2023-02-15 20:41:54,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 20:41:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:54,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 20:41:54,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 20:41:54,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:41:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 20:41:54,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:54,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28731736] [2023-02-15 20:41:54,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:54,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828852035] [2023-02-15 20:41:54,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828852035] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:41:54,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:41:54,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-15 20:41:54,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139239790] [2023-02-15 20:41:54,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:41:54,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:41:54,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:41:54,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:41:54,346 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 20:41:54,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:54,389 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2023-02-15 20:41:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:41:54,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2023-02-15 20:41:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:54,390 INFO L225 Difference]: With dead ends: 57 [2023-02-15 20:41:54,390 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 20:41:54,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:41:54,391 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:54,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 131 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:41:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 20:41:54,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2023-02-15 20:41:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 20:41:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2023-02-15 20:41:54,404 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 42 [2023-02-15 20:41:54,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:54,404 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2023-02-15 20:41:54,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 20:41:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2023-02-15 20:41:54,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 20:41:54,405 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:54,405 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:54,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 20:41:54,610 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 [2023-02-15 20:41:54,611 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:54,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2023-02-15 20:41:54,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:54,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533335510] [2023-02-15 20:41:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:54,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:54,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:54,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499314339] [2023-02-15 20:41:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:54,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:54,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:54,629 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) [2023-02-15 20:41:54,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 20:41:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:54,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:41:54,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 20:41:54,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:41:54,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:54,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533335510] [2023-02-15 20:41:54,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:54,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499314339] [2023-02-15 20:41:54,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499314339] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:41:54,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:41:54,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-15 20:41:54,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860651956] [2023-02-15 20:41:54,932 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:41:54,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:41:54,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:54,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:41:54,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:41:54,933 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 20:41:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:55,094 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2023-02-15 20:41:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 20:41:55,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-02-15 20:41:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:55,095 INFO L225 Difference]: With dead ends: 61 [2023-02-15 20:41:55,095 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 20:41:55,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-02-15 20:41:55,096 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:55,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 121 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:41:55,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 20:41:55,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-02-15 20:41:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 20:41:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2023-02-15 20:41:55,104 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 47 [2023-02-15 20:41:55,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:55,104 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2023-02-15 20:41:55,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 20:41:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2023-02-15 20:41:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 20:41:55,117 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:55,118 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:55,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 20:41:55,321 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 [2023-02-15 20:41:55,322 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:55,322 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2023-02-15 20:41:55,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:55,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519197140] [2023-02-15 20:41:55,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:55,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:55,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:55,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220295849] [2023-02-15 20:41:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:55,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:55,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:55,342 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) [2023-02-15 20:41:55,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 20:41:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:41:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 20:41:55,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:41:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 20:41:55,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:55,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519197140] [2023-02-15 20:41:55,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:55,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220295849] [2023-02-15 20:41:55,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220295849] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:41:55,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:41:55,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 20:41:55,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079024136] [2023-02-15 20:41:55,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:41:55,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:41:55,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:55,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:41:55,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:41:55,509 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-15 20:41:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:55,623 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2023-02-15 20:41:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 20:41:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2023-02-15 20:41:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:55,626 INFO L225 Difference]: With dead ends: 211 [2023-02-15 20:41:55,626 INFO L226 Difference]: Without dead ends: 203 [2023-02-15 20:41:55,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:41:55,627 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 72 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:55,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 203 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:41:55,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-15 20:41:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2023-02-15 20:41:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-02-15 20:41:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2023-02-15 20:41:55,675 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2023-02-15 20:41:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:55,675 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2023-02-15 20:41:55,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-15 20:41:55,676 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2023-02-15 20:41:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 20:41:55,676 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:55,677 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:55,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 20:41:55,881 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 [2023-02-15 20:41:55,882 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:55,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:55,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2023-02-15 20:41:55,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:55,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15587980] [2023-02-15 20:41:55,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:55,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:55,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:55,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143847593] [2023-02-15 20:41:55,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:55,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:55,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:55,905 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) [2023-02-15 20:41:55,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 20:41:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:55,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 20:41:55,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 20:41:56,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:41:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 20:41:56,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:56,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15587980] [2023-02-15 20:41:56,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:56,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143847593] [2023-02-15 20:41:56,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143847593] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:41:56,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:41:56,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-15 20:41:56,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671027407] [2023-02-15 20:41:56,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:41:56,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 20:41:56,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:56,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 20:41:56,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:41:56,115 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 20:41:56,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:56,304 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2023-02-15 20:41:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 20:41:56,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2023-02-15 20:41:56,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:56,306 INFO L225 Difference]: With dead ends: 279 [2023-02-15 20:41:56,306 INFO L226 Difference]: Without dead ends: 259 [2023-02-15 20:41:56,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-15 20:41:56,306 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 70 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:56,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 286 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:41:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-15 20:41:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2023-02-15 20:41:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-02-15 20:41:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2023-02-15 20:41:56,330 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2023-02-15 20:41:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:56,331 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2023-02-15 20:41:56,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 20:41:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2023-02-15 20:41:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:41:56,331 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:56,331 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:56,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 20:41:56,536 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 [2023-02-15 20:41:56,536 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:56,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:56,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2023-02-15 20:41:56,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:56,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499852660] [2023-02-15 20:41:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:56,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:56,542 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:56,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215696551] [2023-02-15 20:41:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:56,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:56,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:56,543 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) [2023-02-15 20:41:56,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 20:41:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:56,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:41:56,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 20:41:56,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:41:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 20:41:56,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499852660] [2023-02-15 20:41:56,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215696551] [2023-02-15 20:41:56,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215696551] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:41:56,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:41:56,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 20:41:56,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820247796] [2023-02-15 20:41:56,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:41:56,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:41:56,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:56,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:41:56,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:41:56,717 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-15 20:41:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:56,834 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2023-02-15 20:41:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 20:41:56,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 59 [2023-02-15 20:41:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:56,836 INFO L225 Difference]: With dead ends: 344 [2023-02-15 20:41:56,836 INFO L226 Difference]: Without dead ends: 248 [2023-02-15 20:41:56,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:41:56,837 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:56,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 241 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:41:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-02-15 20:41:56,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2023-02-15 20:41:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-02-15 20:41:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2023-02-15 20:41:56,858 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2023-02-15 20:41:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:56,858 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2023-02-15 20:41:56,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-15 20:41:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2023-02-15 20:41:56,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 20:41:56,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:56,859 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:56,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 20:41:57,066 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 [2023-02-15 20:41:57,066 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:57,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:57,067 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2023-02-15 20:41:57,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:57,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243874162] [2023-02-15 20:41:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:57,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:57,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:57,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515632084] [2023-02-15 20:41:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:57,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:57,074 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) [2023-02-15 20:41:57,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 20:41:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:41:57,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 20:41:57,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-15 20:41:57,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:41:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-15 20:41:57,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:57,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243874162] [2023-02-15 20:41:57,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:57,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515632084] [2023-02-15 20:41:57,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515632084] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:41:57,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:41:57,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-02-15 20:41:57,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961042187] [2023-02-15 20:41:57,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:41:57,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:41:57,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:41:57,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:41:57,406 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-15 20:41:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:57,792 INFO L93 Difference]: Finished difference Result 330 states and 429 transitions. [2023-02-15 20:41:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 20:41:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 64 [2023-02-15 20:41:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:57,795 INFO L225 Difference]: With dead ends: 330 [2023-02-15 20:41:57,795 INFO L226 Difference]: Without dead ends: 324 [2023-02-15 20:41:57,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:41:57,796 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 59 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:57,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 355 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:41:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-02-15 20:41:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2023-02-15 20:41:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 203 states have internal predecessors, (232), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2023-02-15 20:41:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2023-02-15 20:41:57,819 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 64 [2023-02-15 20:41:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:57,820 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2023-02-15 20:41:57,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-15 20:41:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2023-02-15 20:41:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 20:41:57,820 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:57,821 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:57,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 20:41:58,025 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 [2023-02-15 20:41:58,026 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2023-02-15 20:41:58,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:58,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595487501] [2023-02-15 20:41:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:58,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:58,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:58,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033920871] [2023-02-15 20:41:58,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:41:58,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:58,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:58,033 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) [2023-02-15 20:41:58,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 20:41:58,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:41:58,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:41:58,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 20:41:58,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 26 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-15 20:41:58,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:41:58,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:58,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595487501] [2023-02-15 20:41:58,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:58,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033920871] [2023-02-15 20:41:58,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033920871] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:41:58,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:41:58,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-15 20:41:58,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178920325] [2023-02-15 20:41:58,505 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:41:58,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:41:58,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:58,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:41:58,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:41:58,506 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 20:41:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:41:58,752 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2023-02-15 20:41:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 20:41:58,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 69 [2023-02-15 20:41:58,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:41:58,754 INFO L225 Difference]: With dead ends: 315 [2023-02-15 20:41:58,754 INFO L226 Difference]: Without dead ends: 313 [2023-02-15 20:41:58,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:41:58,755 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 66 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:41:58,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 195 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:41:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-02-15 20:41:58,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2023-02-15 20:41:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 215 states have internal predecessors, (246), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2023-02-15 20:41:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 388 transitions. [2023-02-15 20:41:58,781 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 388 transitions. Word has length 69 [2023-02-15 20:41:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:41:58,782 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 388 transitions. [2023-02-15 20:41:58,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 20:41:58,782 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 388 transitions. [2023-02-15 20:41:58,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 20:41:58,782 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:41:58,783 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:41:58,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 20:41:58,987 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 [2023-02-15 20:41:58,987 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:41:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:41:58,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2023-02-15 20:41:58,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:41:58,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078630923] [2023-02-15 20:41:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:41:58,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:41:59,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:41:59,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466640125] [2023-02-15 20:41:59,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:41:59,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:41:59,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:41:59,006 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) [2023-02-15 20:41:59,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 20:41:59,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:41:59,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:41:59,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 20:41:59,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:41:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-15 20:41:59,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:41:59,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:41:59,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078630923] [2023-02-15 20:41:59,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:41:59,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466640125] [2023-02-15 20:41:59,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466640125] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:41:59,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:41:59,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-15 20:41:59,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679877206] [2023-02-15 20:41:59,718 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:41:59,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 20:41:59,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:41:59,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 20:41:59,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:41:59,718 INFO L87 Difference]: Start difference. First operand 310 states and 388 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-15 20:42:00,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:00,188 INFO L93 Difference]: Finished difference Result 327 states and 404 transitions. [2023-02-15 20:42:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 20:42:00,188 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 74 [2023-02-15 20:42:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:00,191 INFO L225 Difference]: With dead ends: 327 [2023-02-15 20:42:00,191 INFO L226 Difference]: Without dead ends: 323 [2023-02-15 20:42:00,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:42:00,192 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:00,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 209 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 20:42:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-02-15 20:42:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2023-02-15 20:42:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 214 states have (on average 1.1822429906542056) internal successors, (253), 222 states have internal predecessors, (253), 73 states have call successors, (73), 33 states have call predecessors, (73), 32 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2023-02-15 20:42:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 395 transitions. [2023-02-15 20:42:00,230 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 395 transitions. Word has length 74 [2023-02-15 20:42:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:00,231 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 395 transitions. [2023-02-15 20:42:00,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-15 20:42:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 395 transitions. [2023-02-15 20:42:00,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-15 20:42:00,233 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:00,233 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:42:00,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:00,438 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 [2023-02-15 20:42:00,438 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2023-02-15 20:42:00,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:00,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624709233] [2023-02-15 20:42:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:00,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:00,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:00,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431329293] [2023-02-15 20:42:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:00,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:00,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:00,458 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) [2023-02-15 20:42:00,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 20:42:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 20:42:00,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-15 20:42:00,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-15 20:42:01,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:01,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624709233] [2023-02-15 20:42:01,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:01,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431329293] [2023-02-15 20:42:01,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431329293] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:42:01,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:42:01,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-15 20:42:01,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789366610] [2023-02-15 20:42:01,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:01,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 20:42:01,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:01,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 20:42:01,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:42:01,364 INFO L87 Difference]: Start difference. First operand 320 states and 395 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-15 20:42:09,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:09,973 INFO L93 Difference]: Finished difference Result 454 states and 601 transitions. [2023-02-15 20:42:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 20:42:09,974 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2023-02-15 20:42:09,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:09,975 INFO L225 Difference]: With dead ends: 454 [2023-02-15 20:42:09,975 INFO L226 Difference]: Without dead ends: 443 [2023-02-15 20:42:09,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 20:42:09,976 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 154 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:09,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 595 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-02-15 20:42:09,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-02-15 20:42:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 410. [2023-02-15 20:42:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 272 states have (on average 1.2316176470588236) internal successors, (335), 281 states have internal predecessors, (335), 103 states have call successors, (103), 34 states have call predecessors, (103), 34 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2023-02-15 20:42:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 539 transitions. [2023-02-15 20:42:10,033 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 539 transitions. Word has length 80 [2023-02-15 20:42:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:10,034 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 539 transitions. [2023-02-15 20:42:10,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-15 20:42:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 539 transitions. [2023-02-15 20:42:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-15 20:42:10,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:10,035 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:42:10,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:10,235 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 [2023-02-15 20:42:10,236 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:10,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:10,236 INFO L85 PathProgramCache]: Analyzing trace with hash 164622435, now seen corresponding path program 4 times [2023-02-15 20:42:10,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:10,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197473559] [2023-02-15 20:42:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:10,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:10,242 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:10,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121210945] [2023-02-15 20:42:10,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:42:10,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:10,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:10,243 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) [2023-02-15 20:42:10,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 20:42:10,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:42:10,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:42:10,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 20:42:10,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-15 20:42:10,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:42:10,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:10,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197473559] [2023-02-15 20:42:10,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:10,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121210945] [2023-02-15 20:42:10,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121210945] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:42:10,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:42:10,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 20:42:10,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743282242] [2023-02-15 20:42:10,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:42:10,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:42:10,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:10,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:42:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:42:10,320 INFO L87 Difference]: Start difference. First operand 410 states and 539 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-15 20:42:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:10,442 INFO L93 Difference]: Finished difference Result 623 states and 882 transitions. [2023-02-15 20:42:10,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:42:10,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 96 [2023-02-15 20:42:10,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:10,444 INFO L225 Difference]: With dead ends: 623 [2023-02-15 20:42:10,445 INFO L226 Difference]: Without dead ends: 448 [2023-02-15 20:42:10,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:42:10,446 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:10,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 163 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:42:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-02-15 20:42:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 405. [2023-02-15 20:42:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 265 states have (on average 1.230188679245283) internal successors, (326), 271 states have internal predecessors, (326), 105 states have call successors, (105), 34 states have call predecessors, (105), 34 states have return successors, (103), 99 states have call predecessors, (103), 103 states have call successors, (103) [2023-02-15 20:42:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 534 transitions. [2023-02-15 20:42:10,506 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 534 transitions. Word has length 96 [2023-02-15 20:42:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:10,506 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 534 transitions. [2023-02-15 20:42:10,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-15 20:42:10,506 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 534 transitions. [2023-02-15 20:42:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-02-15 20:42:10,507 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:10,508 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:42:10,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-15 20:42:10,735 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 [2023-02-15 20:42:10,736 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:10,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1718599493, now seen corresponding path program 1 times [2023-02-15 20:42:10,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:10,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795844579] [2023-02-15 20:42:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:10,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:10,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:10,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625837549] [2023-02-15 20:42:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:10,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:10,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:10,765 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) [2023-02-15 20:42:10,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 20:42:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:10,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 20:42:10,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-02-15 20:42:11,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-02-15 20:42:12,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795844579] [2023-02-15 20:42:12,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625837549] [2023-02-15 20:42:12,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625837549] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:42:12,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:42:12,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-02-15 20:42:12,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111659195] [2023-02-15 20:42:12,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:12,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 20:42:12,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:12,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 20:42:12,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:42:12,493 INFO L87 Difference]: Start difference. First operand 405 states and 534 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 20:42:23,284 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 [] [2023-02-15 20:42:25,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:42:27,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:42:32,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:42:35,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:42:39,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:42:41,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:42:49,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:42:55,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:42:59,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:42:59,025 INFO L93 Difference]: Finished difference Result 639 states and 910 transitions. [2023-02-15 20:42:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 20:42:59,025 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 97 [2023-02-15 20:42:59,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:42:59,039 INFO L225 Difference]: With dead ends: 639 [2023-02-15 20:42:59,039 INFO L226 Difference]: Without dead ends: 637 [2023-02-15 20:42:59,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=388, Invalid=1418, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 20:42:59,047 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 140 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 140 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2023-02-15 20:42:59,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 339 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1214 Invalid, 8 Unknown, 0 Unchecked, 27.6s Time] [2023-02-15 20:42:59,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2023-02-15 20:42:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 468. [2023-02-15 20:42:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 305 states have (on average 1.2524590163934426) internal successors, (382), 312 states have internal predecessors, (382), 127 states have call successors, (127), 35 states have call predecessors, (127), 35 states have return successors, (125), 120 states have call predecessors, (125), 125 states have call successors, (125) [2023-02-15 20:42:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 634 transitions. [2023-02-15 20:42:59,162 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 634 transitions. Word has length 97 [2023-02-15 20:42:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:42:59,162 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 634 transitions. [2023-02-15 20:42:59,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 20:42:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 634 transitions. [2023-02-15 20:42:59,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-15 20:42:59,163 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:42:59,163 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:42:59,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 20:42:59,368 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 [2023-02-15 20:42:59,368 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:42:59,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:42:59,369 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2023-02-15 20:42:59,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:42:59,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997539129] [2023-02-15 20:42:59,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:59,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:42:59,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:42:59,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130068473] [2023-02-15 20:42:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:42:59,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:42:59,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:42:59,377 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) [2023-02-15 20:42:59,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 20:42:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:42:59,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 20:42:59,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:42:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-02-15 20:42:59,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:42:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-02-15 20:42:59,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:42:59,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997539129] [2023-02-15 20:42:59,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:42:59,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130068473] [2023-02-15 20:42:59,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130068473] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:42:59,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:42:59,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-15 20:42:59,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385430408] [2023-02-15 20:42:59,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:42:59,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:42:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:42:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:42:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:42:59,690 INFO L87 Difference]: Start difference. First operand 468 states and 634 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-15 20:43:00,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:00,413 INFO L93 Difference]: Finished difference Result 1595 states and 2213 transitions. [2023-02-15 20:43:00,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 20:43:00,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 112 [2023-02-15 20:43:00,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:00,418 INFO L225 Difference]: With dead ends: 1595 [2023-02-15 20:43:00,418 INFO L226 Difference]: Without dead ends: 1391 [2023-02-15 20:43:00,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2023-02-15 20:43:00,420 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 277 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:43:00,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 435 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:43:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2023-02-15 20:43:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1335. [2023-02-15 20:43:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 837 states have (on average 1.1971326164874552) internal successors, (1002), 856 states have internal predecessors, (1002), 382 states have call successors, (382), 115 states have call predecessors, (382), 115 states have return successors, (373), 363 states have call predecessors, (373), 373 states have call successors, (373) [2023-02-15 20:43:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1757 transitions. [2023-02-15 20:43:00,811 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1757 transitions. Word has length 112 [2023-02-15 20:43:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:00,812 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 1757 transitions. [2023-02-15 20:43:00,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-15 20:43:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1757 transitions. [2023-02-15 20:43:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-15 20:43:00,813 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:00,813 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:43:00,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 20:43:01,018 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 [2023-02-15 20:43:01,018 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:01,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1897577373, now seen corresponding path program 2 times [2023-02-15 20:43:01,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:01,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899095758] [2023-02-15 20:43:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:01,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:01,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:01,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331183] [2023-02-15 20:43:01,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:43:01,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:01,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:01,029 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) [2023-02-15 20:43:01,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 20:43:01,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:43:01,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:43:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 20:43:01,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-15 20:43:01,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-15 20:43:02,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:02,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899095758] [2023-02-15 20:43:02,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:02,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331183] [2023-02-15 20:43:02,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331183] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:43:02,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:43:02,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-15 20:43:02,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023614904] [2023-02-15 20:43:02,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:02,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 20:43:02,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:02,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 20:43:02,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:43:02,027 INFO L87 Difference]: Start difference. First operand 1335 states and 1757 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 18 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2023-02-15 20:43:23,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:23,225 INFO L93 Difference]: Finished difference Result 1903 states and 2570 transitions. [2023-02-15 20:43:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-15 20:43:23,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 18 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) Word has length 115 [2023-02-15 20:43:23,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:23,260 INFO L225 Difference]: With dead ends: 1903 [2023-02-15 20:43:23,260 INFO L226 Difference]: Without dead ends: 1901 [2023-02-15 20:43:23,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=645, Invalid=2547, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 20:43:23,262 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 171 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:43:23,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 687 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2023-02-15 20:43:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2023-02-15 20:43:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1788. [2023-02-15 20:43:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1107 states have (on average 1.2113821138211383) internal successors, (1341), 1126 states have internal predecessors, (1341), 538 states have call successors, (538), 142 states have call predecessors, (538), 142 states have return successors, (529), 519 states have call predecessors, (529), 529 states have call successors, (529) [2023-02-15 20:43:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2408 transitions. [2023-02-15 20:43:23,920 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2408 transitions. Word has length 115 [2023-02-15 20:43:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:23,921 INFO L495 AbstractCegarLoop]: Abstraction has 1788 states and 2408 transitions. [2023-02-15 20:43:23,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 18 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2023-02-15 20:43:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2408 transitions. [2023-02-15 20:43:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-02-15 20:43:23,922 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:23,922 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:43:23,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-15 20:43:24,127 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 [2023-02-15 20:43:24,127 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:24,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:24,127 INFO L85 PathProgramCache]: Analyzing trace with hash 364386885, now seen corresponding path program 3 times [2023-02-15 20:43:24,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:24,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054151665] [2023-02-15 20:43:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:24,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:24,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:24,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666985370] [2023-02-15 20:43:24,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:43:24,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:24,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:24,140 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) [2023-02-15 20:43:24,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 20:43:24,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:43:24,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:43:24,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-15 20:43:24,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-15 20:43:24,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-15 20:43:25,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:25,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054151665] [2023-02-15 20:43:25,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:25,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666985370] [2023-02-15 20:43:25,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666985370] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:43:25,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:43:25,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2023-02-15 20:43:25,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167449943] [2023-02-15 20:43:25,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:25,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 20:43:25,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 20:43:25,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-02-15 20:43:25,658 INFO L87 Difference]: Start difference. First operand 1788 states and 2408 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-02-15 20:43:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:37,397 INFO L93 Difference]: Finished difference Result 2462 states and 3344 transitions. [2023-02-15 20:43:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 20:43:37,397 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 119 [2023-02-15 20:43:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:37,406 INFO L225 Difference]: With dead ends: 2462 [2023-02-15 20:43:37,415 INFO L226 Difference]: Without dead ends: 2458 [2023-02-15 20:43:37,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=548, Invalid=2314, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 20:43:37,421 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 178 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:43:37,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 685 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-02-15 20:43:37,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2023-02-15 20:43:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2306. [2023-02-15 20:43:38,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 1447 states have (on average 1.219765031098825) internal successors, (1765), 1468 states have internal predecessors, (1765), 678 states have call successors, (678), 181 states have call predecessors, (678), 180 states have return successors, (669), 656 states have call predecessors, (669), 669 states have call successors, (669) [2023-02-15 20:43:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3112 transitions. [2023-02-15 20:43:38,462 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3112 transitions. Word has length 119 [2023-02-15 20:43:38,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:38,462 INFO L495 AbstractCegarLoop]: Abstraction has 2306 states and 3112 transitions. [2023-02-15 20:43:38,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-02-15 20:43:38,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3112 transitions. [2023-02-15 20:43:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-02-15 20:43:38,464 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:38,464 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:43:38,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 20:43:38,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:38,665 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:38,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:38,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1036292276, now seen corresponding path program 1 times [2023-02-15 20:43:38,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:38,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617113415] [2023-02-15 20:43:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:38,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:38,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:38,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512709826] [2023-02-15 20:43:38,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:38,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:38,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:38,673 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:43:38,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 20:43:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:43:38,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 20:43:38,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-15 20:43:38,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2023-02-15 20:43:39,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:39,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617113415] [2023-02-15 20:43:39,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:39,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512709826] [2023-02-15 20:43:39,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512709826] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:43:39,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:43:39,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-15 20:43:39,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395758975] [2023-02-15 20:43:39,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:39,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:43:39,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:39,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:43:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:43:39,041 INFO L87 Difference]: Start difference. First operand 2306 states and 3112 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-15 20:43:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:40,252 INFO L93 Difference]: Finished difference Result 2387 states and 3194 transitions. [2023-02-15 20:43:40,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 20:43:40,252 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 129 [2023-02-15 20:43:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:40,259 INFO L225 Difference]: With dead ends: 2387 [2023-02-15 20:43:40,259 INFO L226 Difference]: Without dead ends: 2347 [2023-02-15 20:43:40,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2023-02-15 20:43:40,260 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 194 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:43:40,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 417 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:43:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2023-02-15 20:43:41,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2333. [2023-02-15 20:43:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1474 states have (on average 1.1845318860244234) internal successors, (1746), 1495 states have internal predecessors, (1746), 678 states have call successors, (678), 181 states have call predecessors, (678), 180 states have return successors, (669), 656 states have call predecessors, (669), 669 states have call successors, (669) [2023-02-15 20:43:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3093 transitions. [2023-02-15 20:43:41,137 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3093 transitions. Word has length 129 [2023-02-15 20:43:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:41,137 INFO L495 AbstractCegarLoop]: Abstraction has 2333 states and 3093 transitions. [2023-02-15 20:43:41,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-15 20:43:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3093 transitions. [2023-02-15 20:43:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-15 20:43:41,139 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:41,139 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:43:41,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-15 20:43:41,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:41,343 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:41,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2066876172, now seen corresponding path program 2 times [2023-02-15 20:43:41,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:41,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348474708] [2023-02-15 20:43:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:41,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:41,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:41,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987521499] [2023-02-15 20:43:41,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:43:41,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:41,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:41,351 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:43:41,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 20:43:41,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:43:41,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:43:41,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-15 20:43:41,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-02-15 20:43:42,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 70 proven. 59 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-02-15 20:43:44,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:44,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348474708] [2023-02-15 20:43:44,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:44,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987521499] [2023-02-15 20:43:44,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987521499] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:43:44,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:43:44,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 32 [2023-02-15 20:43:44,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688014227] [2023-02-15 20:43:44,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:44,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 20:43:44,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:44,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 20:43:44,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2023-02-15 20:43:44,517 INFO L87 Difference]: Start difference. First operand 2333 states and 3093 transitions. Second operand has 32 states, 30 states have (on average 2.3) internal successors, (69), 28 states have internal predecessors, (69), 15 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 14 states have call predecessors, (39), 13 states have call successors, (39) [2023-02-15 20:44:34,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:34,107 INFO L93 Difference]: Finished difference Result 2819 states and 3801 transitions. [2023-02-15 20:44:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-15 20:44:34,108 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.3) internal successors, (69), 28 states have internal predecessors, (69), 15 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 14 states have call predecessors, (39), 13 states have call successors, (39) Word has length 130 [2023-02-15 20:44:34,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:34,122 INFO L225 Difference]: With dead ends: 2819 [2023-02-15 20:44:34,122 INFO L226 Difference]: Without dead ends: 2778 [2023-02-15 20:44:34,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=1166, Invalid=4996, Unknown=0, NotChecked=0, Total=6162 [2023-02-15 20:44:34,125 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 232 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 2476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:34,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 713 Invalid, 2476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2023-02-15 20:44:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2023-02-15 20:44:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2681. [2023-02-15 20:44:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2681 states, 1678 states have (on average 1.1811680572109655) internal successors, (1982), 1699 states have internal predecessors, (1982), 808 states have call successors, (808), 194 states have call predecessors, (808), 194 states have return successors, (801), 787 states have call predecessors, (801), 801 states have call successors, (801) [2023-02-15 20:44:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2681 states to 2681 states and 3591 transitions. [2023-02-15 20:44:35,463 INFO L78 Accepts]: Start accepts. Automaton has 2681 states and 3591 transitions. Word has length 130 [2023-02-15 20:44:35,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:35,464 INFO L495 AbstractCegarLoop]: Abstraction has 2681 states and 3591 transitions. [2023-02-15 20:44:35,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.3) internal successors, (69), 28 states have internal predecessors, (69), 15 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 14 states have call predecessors, (39), 13 states have call successors, (39) [2023-02-15 20:44:35,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2681 states and 3591 transitions. [2023-02-15 20:44:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-02-15 20:44:35,465 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:35,466 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:44:35,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 20:44:35,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:35,671 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:35,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1962327715, now seen corresponding path program 4 times [2023-02-15 20:44:35,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:35,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610585864] [2023-02-15 20:44:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:35,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:35,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:35,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050433464] [2023-02-15 20:44:35,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:44:35,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:35,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:35,679 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:44:35,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 20:44:35,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:44:35,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:44:35,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-15 20:44:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 129 proven. 96 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2023-02-15 20:44:37,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 129 proven. 87 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2023-02-15 20:44:44,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:44,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610585864] [2023-02-15 20:44:44,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:44,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050433464] [2023-02-15 20:44:44,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050433464] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:44,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:44,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-15 20:44:44,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804492673] [2023-02-15 20:44:44,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:44,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 20:44:44,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 20:44:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2023-02-15 20:44:44,175 INFO L87 Difference]: Start difference. First operand 2681 states and 3591 transitions. Second operand has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 28 states have internal predecessors, (73), 16 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 16 states have call predecessors, (46), 15 states have call successors, (46) [2023-02-15 20:44:47,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:45:51,039 WARN L233 SmtUtils]: Spent 59.08s on a formula simplification. DAG size of input: 151 DAG size of output: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:45:58,715 WARN L233 SmtUtils]: Spent 7.36s on a formula simplification that was a NOOP. DAG size: 132 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:46:00,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:46:07,361 WARN L233 SmtUtils]: Spent 6.33s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:46:15,183 WARN L233 SmtUtils]: Spent 6.47s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)