./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/hard-u_unwindbound5.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 082e5acb2a505af9e43ec1a894890509a127a32d8ecd4c5193a456bddcb0f4a3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 12:02:55,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:02:55,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:02:55,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:02:55,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:02:55,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:02:55,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:02:55,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:02:55,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:02:55,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:02:55,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:02:55,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:02:55,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:02:55,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:02:55,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:02:55,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:02:55,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:02:55,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:02:55,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:02:55,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:02:55,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:02:55,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:02:55,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:02:55,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:02:55,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:02:55,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:02:55,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:02:55,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:02:55,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:02:55,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:02:55,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:02:55,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:02:55,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:02:55,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:02:56,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:02:56,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:02:56,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:02:56,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:02:56,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:02:56,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:02:56,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:02:56,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 12:02:56,050 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:02:56,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:02:56,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:02:56,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:02:56,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:02:56,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:02:56,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:02:56,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:02:56,053 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:02:56,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:02:56,054 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:02:56,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:02:56,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:02:56,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:02:56,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 12:02:56,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:02:56,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 12:02:56,056 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:02:56,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 12:02:56,056 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:02:56,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 12:02:56,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:02:56,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:02:56,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:02:56,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:02:56,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:02:56,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:02:56,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 12:02:56,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:02:56,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:02:56,059 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:02:56,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 12:02:56,059 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:02:56,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:02:56,060 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:02:56,060 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 082e5acb2a505af9e43ec1a894890509a127a32d8ecd4c5193a456bddcb0f4a3 [2023-02-15 12:02:56,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:02:56,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:02:56,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:02:56,463 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:02:56,464 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:02:56,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2023-02-15 12:02:58,126 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:02:58,433 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:02:58,436 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2023-02-15 12:02:58,444 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f3deaf2/4a85c419a018427b9ddab85fffac5db3/FLAG40bc044ba [2023-02-15 12:02:58,485 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f3deaf2/4a85c419a018427b9ddab85fffac5db3 [2023-02-15 12:02:58,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:02:58,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:02:58,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:02:58,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:02:58,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:02:58,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:58,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16929689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58, skipping insertion in model container [2023-02-15 12:02:58,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:58,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:02:58,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:02:58,791 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/hard-u_unwindbound5.c[537,550] [2023-02-15 12:02:58,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:02:58,841 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:02:58,887 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/hard-u_unwindbound5.c[537,550] [2023-02-15 12:02:58,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:02:58,915 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:02:58,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58 WrapperNode [2023-02-15 12:02:58,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:02:58,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:02:58,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:02:58,918 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:02:58,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:58,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:58,982 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-15 12:02:58,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:02:58,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:02:58,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:02:58,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:02:59,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:59,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:59,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:59,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:59,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:59,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:59,036 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:59,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:59,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:02:59,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:02:59,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:02:59,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:02:59,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58" (1/1) ... [2023-02-15 12:02:59,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:02:59,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:02:59,166 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 12:02:59,228 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 12:02:59,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:02:59,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:02:59,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:02:59,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:02:59,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 12:02:59,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 12:02:59,323 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:02:59,325 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:02:59,555 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:02:59,565 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:02:59,566 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 12:02:59,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:02:59 BoogieIcfgContainer [2023-02-15 12:02:59,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:02:59,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:02:59,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:02:59,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:02:59,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:02:58" (1/3) ... [2023-02-15 12:02:59,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7427e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:02:59, skipping insertion in model container [2023-02-15 12:02:59,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:02:58" (2/3) ... [2023-02-15 12:02:59,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7427e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:02:59, skipping insertion in model container [2023-02-15 12:02:59,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:02:59" (3/3) ... [2023-02-15 12:02:59,577 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound5.c [2023-02-15 12:02:59,594 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:02:59,595 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 12:02:59,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:02:59,662 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;@4a7f5c13, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:02:59,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 12:02:59,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 12:02:59,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 12:02:59,681 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:02:59,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:02:59,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:02:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:02:59,691 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2023-02-15 12:02:59,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:02:59,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370668165] [2023-02-15 12:02:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:02:59,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:02:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:02:59,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:02:59,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370668165] [2023-02-15 12:02:59,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 12:02:59,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134585909] [2023-02-15 12:02:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:02:59,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:02:59,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:02:59,881 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 12:02:59,949 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 12:03:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:00,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 12:03:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:03:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:03:00,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:03:00,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134585909] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:03:00,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:03:00,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:03:00,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274944718] [2023-02-15 12:03:00,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:03:00,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 12:03:00,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:03:00,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 12:03:00,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 12:03:00,229 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:03:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:03:00,289 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2023-02-15 12:03:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 12:03:00,291 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 12:03:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:03:00,297 INFO L225 Difference]: With dead ends: 53 [2023-02-15 12:03:00,312 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 12:03:00,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 12:03:00,319 INFO L413 NwaCegarLoop]: 38 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, 38 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 12:03:00,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:03:00,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 12:03:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-15 12:03:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:03:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2023-02-15 12:03:00,410 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2023-02-15 12:03:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:03:00,410 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2023-02-15 12:03:00,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:03:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2023-02-15 12:03:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 12:03:00,412 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:03:00,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:03:00,439 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 12:03:00,627 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 12:03:00,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:03:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:03:00,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2023-02-15 12:03:00,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:03:00,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11883864] [2023-02-15 12:03:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:00,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:03:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:03:00,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:03:00,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11883864] [2023-02-15 12:03:00,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11883864] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:03:00,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:03:00,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:03:00,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500269626] [2023-02-15 12:03:00,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:03:00,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:03:00,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:03:00,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:03:00,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:03:00,967 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:03:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:03:01,045 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2023-02-15 12:03:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 12:03:01,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 12:03:01,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:03:01,047 INFO L225 Difference]: With dead ends: 38 [2023-02-15 12:03:01,048 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 12:03:01,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:03:01,049 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:03:01,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:03:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 12:03:01,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2023-02-15 12:03:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:03:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-15 12:03:01,064 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-15 12:03:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:03:01,064 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-15 12:03:01,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:03:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-15 12:03:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 12:03:01,066 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:03:01,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:03:01,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 12:03:01,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:03:01,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:03:01,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2023-02-15 12:03:01,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:03:01,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949743313] [2023-02-15 12:03:01,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:01,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:03:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:01,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:03:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949743313] [2023-02-15 12:03:01,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 12:03:01,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889698876] [2023-02-15 12:03:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:01,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:01,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:03:01,094 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 12:03:01,097 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 12:03:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:01,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 12:03:01,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:03:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:03:01,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:03:01,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889698876] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:03:01,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:03:01,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:03:01,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218984140] [2023-02-15 12:03:01,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:03:01,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:03:01,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:03:01,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:03:01,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:03:01,197 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:03:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:03:01,212 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2023-02-15 12:03:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:03:01,212 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 12:03:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:03:01,213 INFO L225 Difference]: With dead ends: 44 [2023-02-15 12:03:01,213 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 12:03:01,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 12:03:01,215 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 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 12:03:01,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:03:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 12:03:01,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-15 12:03:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:03:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-15 12:03:01,223 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2023-02-15 12:03:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:03:01,223 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-15 12:03:01,224 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:03:01,224 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-15 12:03:01,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 12:03:01,225 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:03:01,225 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:03:01,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 12:03:01,431 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,SelfDestructingSolverStorable2 [2023-02-15 12:03:01,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:03:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:03:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2023-02-15 12:03:01,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:03:01,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738975515] [2023-02-15 12:03:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:01,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:03:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:01,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 12:03:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:03:01,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:03:01,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738975515] [2023-02-15 12:03:01,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738975515] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:03:01,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:03:01,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:03:01,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094826067] [2023-02-15 12:03:01,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:03:01,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:03:01,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:03:01,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:03:01,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:03:01,853 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 12:03:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:03:01,914 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2023-02-15 12:03:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 12:03:01,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-15 12:03:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:03:01,915 INFO L225 Difference]: With dead ends: 44 [2023-02-15 12:03:01,916 INFO L226 Difference]: Without dead ends: 42 [2023-02-15 12:03:01,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:03:01,917 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 13 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 102 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 12:03:01,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 102 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:03:01,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-15 12:03:01,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2023-02-15 12:03:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:03:01,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-15 12:03:01,925 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2023-02-15 12:03:01,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:03:01,926 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-15 12:03:01,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 12:03:01,926 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-15 12:03:01,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 12:03:01,927 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:03:01,927 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:03:01,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 12:03:01,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:03:01,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:03:01,928 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2023-02-15 12:03:01,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:03:01,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321283870] [2023-02-15 12:03:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:01,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:03:01,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:03:01,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506748946] [2023-02-15 12:03:01,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:01,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:01,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:03:01,946 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 12:03:01,948 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 12:03:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:01,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 12:03:01,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:03:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:03:02,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:03:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:03:02,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:03:02,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321283870] [2023-02-15 12:03:02,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:03:02,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506748946] [2023-02-15 12:03:02,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506748946] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:03:02,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:03:02,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-15 12:03:02,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137333641] [2023-02-15 12:03:02,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:03:02,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 12:03:02,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:03:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 12:03:02,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-15 12:03:02,594 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 12:03:04,863 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 12:03:07,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 12:03:09,226 WARN L539 Checker$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 12:03:11,229 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 12:03:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:03:11,523 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2023-02-15 12:03:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 12:03:11,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2023-02-15 12:03:11,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:03:11,526 INFO L225 Difference]: With dead ends: 78 [2023-02-15 12:03:11,526 INFO L226 Difference]: Without dead ends: 63 [2023-02-15 12:03:11,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 12:03:11,528 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 19 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-02-15 12:03:11,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 121 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 224 Invalid, 4 Unknown, 0 Unchecked, 8.9s Time] [2023-02-15 12:03:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-15 12:03:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-02-15 12:03:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 states have internal predecessors, (47), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-15 12:03:11,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2023-02-15 12:03:11,542 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 20 [2023-02-15 12:03:11,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:03:11,542 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2023-02-15 12:03:11,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 12:03:11,543 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2023-02-15 12:03:11,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 12:03:11,544 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:03:11,544 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:03:11,559 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 12:03:11,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:11,752 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:03:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:03:11,753 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2023-02-15 12:03:11,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:03:11,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294391337] [2023-02-15 12:03:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:11,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:03:11,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:03:11,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625488158] [2023-02-15 12:03:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:11,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:11,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:03:11,769 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 12:03:11,772 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 12:03:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:11,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 12:03:11,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:03:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:03:11,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:03:11,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:03:11,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294391337] [2023-02-15 12:03:11,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:03:11,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625488158] [2023-02-15 12:03:11,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625488158] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:03:11,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:03:11,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 12:03:11,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392231605] [2023-02-15 12:03:11,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:03:11,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:03:11,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:03:11,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:03:11,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:03:11,876 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 12:03:11,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:03:11,910 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2023-02-15 12:03:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:03:11,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-15 12:03:11,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:03:11,925 INFO L225 Difference]: With dead ends: 76 [2023-02-15 12:03:11,925 INFO L226 Difference]: Without dead ends: 69 [2023-02-15 12:03:11,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 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 12:03:11,928 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:03:11,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 99 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:03:11,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-15 12:03:11,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-15 12:03:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 47 states have internal predecessors, (52), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-15 12:03:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2023-02-15 12:03:11,964 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 28 [2023-02-15 12:03:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:03:11,964 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2023-02-15 12:03:11,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 12:03:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2023-02-15 12:03:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 12:03:11,965 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:03:11,965 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:03:11,974 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 12:03:12,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:12,171 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:03:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:03:12,171 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2023-02-15 12:03:12,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:03:12,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506640648] [2023-02-15 12:03:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:12,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:03:12,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:03:12,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418137626] [2023-02-15 12:03:12,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:12,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:12,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:03:12,184 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 12:03:12,186 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 12:03:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:12,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 12:03:12,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:03:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:03:12,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:03:12,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:03:12,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506640648] [2023-02-15 12:03:12,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:03:12,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418137626] [2023-02-15 12:03:12,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418137626] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:03:12,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:03:12,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 12:03:12,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358194836] [2023-02-15 12:03:12,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:03:12,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 12:03:12,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:03:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 12:03:12,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 12:03:12,407 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 12:03:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:03:12,770 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2023-02-15 12:03:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 12:03:12,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-15 12:03:12,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:03:12,773 INFO L225 Difference]: With dead ends: 75 [2023-02-15 12:03:12,773 INFO L226 Difference]: Without dead ends: 63 [2023-02-15 12:03:12,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-02-15 12:03:12,774 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:03:12,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 103 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:03:12,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-15 12:03:12,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-02-15 12:03:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.2) internal successors, (48), 43 states have internal predecessors, (48), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 12:03:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2023-02-15 12:03:12,783 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 28 [2023-02-15 12:03:12,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:03:12,783 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2023-02-15 12:03:12,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 12:03:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2023-02-15 12:03:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 12:03:12,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:03:12,784 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:03:12,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 12:03:12,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:12,992 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:03:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:03:12,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1040101153, now seen corresponding path program 1 times [2023-02-15 12:03:12,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:03:12,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66055245] [2023-02-15 12:03:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:12,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:03:12,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:03:12,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461628042] [2023-02-15 12:03:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:13,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:13,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:03:13,004 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 12:03:13,049 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 12:03:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:13,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 12:03:13,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:03:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:03:13,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:03:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:03:13,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:03:13,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66055245] [2023-02-15 12:03:13,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:03:13,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461628042] [2023-02-15 12:03:13,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461628042] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:03:13,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:03:13,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-15 12:03:13,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514534381] [2023-02-15 12:03:13,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:03:13,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 12:03:13,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:03:13,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 12:03:13,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 12:03:13,165 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:03:13,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:03:13,266 INFO L93 Difference]: Finished difference Result 134 states and 161 transitions. [2023-02-15 12:03:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 12:03:13,267 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2023-02-15 12:03:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:03:13,268 INFO L225 Difference]: With dead ends: 134 [2023-02-15 12:03:13,268 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 12:03:13,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:03:13,272 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 38 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:03:13,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 148 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:03:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 12:03:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2023-02-15 12:03:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 73 states have internal predecessors, (82), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-15 12:03:13,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2023-02-15 12:03:13,300 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 30 [2023-02-15 12:03:13,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:03:13,302 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2023-02-15 12:03:13,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:03:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2023-02-15 12:03:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 12:03:13,304 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:03:13,304 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:03:13,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 12:03:13,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:13,510 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:03:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:03:13,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2101649637, now seen corresponding path program 1 times [2023-02-15 12:03:13,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:03:13,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515275657] [2023-02-15 12:03:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:13,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:03:13,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:03:13,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479255390] [2023-02-15 12:03:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:13,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:13,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:03:13,525 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 12:03:13,528 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 12:03:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:13,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 12:03:13,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:03:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 12:03:13,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:03:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 12:03:13,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:03:13,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515275657] [2023-02-15 12:03:13,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:03:13,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479255390] [2023-02-15 12:03:13,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479255390] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:03:13,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:03:13,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2023-02-15 12:03:13,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910830958] [2023-02-15 12:03:13,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:03:13,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 12:03:13,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:03:13,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 12:03:13,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 12:03:13,712 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 12:03:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:03:13,835 INFO L93 Difference]: Finished difference Result 163 states and 192 transitions. [2023-02-15 12:03:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 12:03:13,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2023-02-15 12:03:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:03:13,839 INFO L225 Difference]: With dead ends: 163 [2023-02-15 12:03:13,840 INFO L226 Difference]: Without dead ends: 149 [2023-02-15 12:03:13,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:03:13,843 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 43 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:03:13,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 219 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:03:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-15 12:03:13,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 144. [2023-02-15 12:03:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 99 states have internal predecessors, (110), 31 states have call successors, (31), 18 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2023-02-15 12:03:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 169 transitions. [2023-02-15 12:03:13,875 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 169 transitions. Word has length 46 [2023-02-15 12:03:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:03:13,876 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 169 transitions. [2023-02-15 12:03:13,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 12:03:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 169 transitions. [2023-02-15 12:03:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 12:03:13,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:03:13,880 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:03:13,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 12:03:14,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:14,083 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:03:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:03:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2103377515, now seen corresponding path program 1 times [2023-02-15 12:03:14,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:03:14,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754872335] [2023-02-15 12:03:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:14,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:03:14,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:03:14,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799209876] [2023-02-15 12:03:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:14,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:14,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:03:14,092 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 12:03:14,095 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 12:03:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:14,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 12:03:14,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:03:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 12:03:14,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:03:14,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:03:14,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754872335] [2023-02-15 12:03:14,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:03:14,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799209876] [2023-02-15 12:03:14,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799209876] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:03:14,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:03:14,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-15 12:03:14,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050560451] [2023-02-15 12:03:14,303 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:03:14,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 12:03:14,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:03:14,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 12:03:14,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-15 12:03:14,304 INFO L87 Difference]: Start difference. First operand 144 states and 169 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:03:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:03:14,668 INFO L93 Difference]: Finished difference Result 176 states and 211 transitions. [2023-02-15 12:03:14,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 12:03:14,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2023-02-15 12:03:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:03:14,670 INFO L225 Difference]: With dead ends: 176 [2023-02-15 12:03:14,670 INFO L226 Difference]: Without dead ends: 174 [2023-02-15 12:03:14,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:03:14,671 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:03:14,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 89 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:03:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-02-15 12:03:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2023-02-15 12:03:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 120 states have internal predecessors, (134), 37 states have call successors, (37), 21 states have call predecessors, (37), 21 states have return successors, (34), 30 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-15 12:03:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2023-02-15 12:03:14,687 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 46 [2023-02-15 12:03:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:03:14,687 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2023-02-15 12:03:14,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:03:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2023-02-15 12:03:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 12:03:14,688 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:03:14,689 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 12:03:14,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 12:03:14,893 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,SelfDestructingSolverStorable9 [2023-02-15 12:03:14,893 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:03:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:03:14,894 INFO L85 PathProgramCache]: Analyzing trace with hash -246714477, now seen corresponding path program 1 times [2023-02-15 12:03:14,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:03:14,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556844837] [2023-02-15 12:03:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:14,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:03:14,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:03:14,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26026300] [2023-02-15 12:03:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:14,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:14,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:03:14,902 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 12:03:14,928 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 12:03:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:03:15,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 12:03:15,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:03:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 32 proven. 36 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-15 12:03:15,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:03:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 48 proven. 20 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-15 12:03:22,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:03:22,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556844837] [2023-02-15 12:03:22,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:03:22,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26026300] [2023-02-15 12:03:22,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26026300] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:03:22,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:03:22,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2023-02-15 12:03:22,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302586708] [2023-02-15 12:03:22,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:03:22,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 12:03:22,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:03:22,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 12:03:22,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=294, Unknown=2, NotChecked=0, Total=380 [2023-02-15 12:03:22,477 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 10 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-15 12:03:31,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 12:03:33,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 12:03:37,062 WARN L539 Checker$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 12:03:39,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 12:03:41,073 WARN L539 Checker$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 12:03:43,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:03:43,177 INFO L93 Difference]: Finished difference Result 215 states and 256 transitions. [2023-02-15 12:03:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 12:03:43,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 10 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 56 [2023-02-15 12:03:43,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:03:43,180 INFO L225 Difference]: With dead ends: 215 [2023-02-15 12:03:43,181 INFO L226 Difference]: Without dead ends: 193 [2023-02-15 12:03:43,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=177, Invalid=633, Unknown=2, NotChecked=0, Total=812 [2023-02-15 12:03:43,182 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 107 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 126 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:03:43,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 153 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 424 Invalid, 4 Unknown, 0 Unchecked, 19.5s Time] [2023-02-15 12:03:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-15 12:03:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 179. [2023-02-15 12:03:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 120 states have (on average 1.1583333333333334) internal successors, (139), 125 states have internal predecessors, (139), 35 states have call successors, (35), 23 states have call predecessors, (35), 23 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-15 12:03:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 207 transitions. [2023-02-15 12:03:43,198 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 207 transitions. Word has length 56 [2023-02-15 12:03:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:03:43,198 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 207 transitions. [2023-02-15 12:03:43,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 10 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-15 12:03:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 207 transitions. [2023-02-15 12:03:43,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 12:03:43,200 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:03:43,200 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:03:43,211 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 12:03:43,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:43,401 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:03:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:03:43,401 INFO L85 PathProgramCache]: Analyzing trace with hash 98519191, now seen corresponding path program 1 times [2023-02-15 12:03:43,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:03:43,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143612635] [2023-02-15 12:03:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:43,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:03:43,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:03:43,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961313965] [2023-02-15 12:03:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:03:43,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:03:43,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:03:43,414 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 12:03:43,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process