./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.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/fermat1-ll_unwindbound50.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 ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:47:44,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:47:44,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:47:44,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:47:44,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:47:44,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:47:44,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:47:44,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:47:44,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:47:44,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:47:44,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:47:44,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:47:44,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:47:44,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:47:44,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:47:44,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:47:44,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:47:44,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:47:44,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:47:44,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:47:44,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:47:44,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:47:44,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:47:44,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:47:44,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:47:44,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:47:44,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:47:44,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:47:44,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:47:44,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:47:44,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:47:44,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:47:44,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:47:44,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:47:44,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:47:44,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:47:44,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:47:44,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:47:44,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:47:44,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:47:44,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:47:44,322 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:47:44,353 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:47:44,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:47:44,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:47:44,353 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:47:44,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:47:44,354 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:47:44,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:47:44,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:47:44,355 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:47:44,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:47:44,356 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:47:44,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:47:44,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:47:44,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:47:44,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:47:44,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:47:44,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:47:44,357 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:47:44,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:47:44,357 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:47:44,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:47:44,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:47:44,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:47:44,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:47:44,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:47:44,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:47:44,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:47:44,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:47:44,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:47:44,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:47:44,359 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:47:44,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:47:44,359 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:47:44,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:47:44,360 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:47:44,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d [2023-02-15 11:47:44,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:47:44,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:47:44,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:47:44,592 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:47:44,592 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:47:44,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2023-02-15 11:47:45,515 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:47:45,638 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:47:45,638 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2023-02-15 11:47:45,660 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8d69e04/7cad133d88a04c679819fa62258d68b4/FLAG8932dd3a2 [2023-02-15 11:47:45,671 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8d69e04/7cad133d88a04c679819fa62258d68b4 [2023-02-15 11:47:45,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:47:45,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:47:45,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:47:45,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:47:45,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:47:45,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44923e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45, skipping insertion in model container [2023-02-15 11:47:45,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:47:45,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:47:45,781 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/fermat1-ll_unwindbound50.c[535,548] [2023-02-15 11:47:45,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:47:45,798 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:47:45,806 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/fermat1-ll_unwindbound50.c[535,548] [2023-02-15 11:47:45,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:47:45,820 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:47:45,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45 WrapperNode [2023-02-15 11:47:45,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:47:45,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:47:45,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:47:45,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:47:45,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,846 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-15 11:47:45,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:47:45,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:47:45,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:47:45,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:47:45,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,865 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:47:45,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:47:45,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:47:45,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:47:45,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45" (1/1) ... [2023-02-15 11:47:45,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:47:45,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:45,893 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 11:47:45,895 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 11:47:45,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:47:45,917 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 11:47:45,917 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 11:47:45,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:47:45,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:47:45,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:47:45,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:47:45,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:47:45,958 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:47:45,960 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:47:46,061 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:47:46,065 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:47:46,065 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 11:47:46,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:47:46 BoogieIcfgContainer [2023-02-15 11:47:46,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:47:46,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:47:46,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:47:46,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:47:46,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:47:45" (1/3) ... [2023-02-15 11:47:46,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a74b4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:47:46, skipping insertion in model container [2023-02-15 11:47:46,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:45" (2/3) ... [2023-02-15 11:47:46,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a74b4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:47:46, skipping insertion in model container [2023-02-15 11:47:46,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:47:46" (3/3) ... [2023-02-15 11:47:46,121 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.c [2023-02-15 11:47:46,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:47:46,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:47:46,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:47:46,193 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;@3fc75db3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:47:46,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:47:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 11:47:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 11:47:46,201 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:46,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:46,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:46,206 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2023-02-15 11:47:46,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:46,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504833624] [2023-02-15 11:47:46,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:46,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:46,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:46,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62047293] [2023-02-15 11:47:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:46,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:46,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:46,272 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 11:47:46,275 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 11:47:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:46,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 11:47:46,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 11:47:46,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:46,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:46,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504833624] [2023-02-15 11:47:46,371 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62047293] [2023-02-15 11:47:46,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62047293] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:46,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:46,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:47:46,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107838459] [2023-02-15 11:47:46,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:46,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:47:46,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:46,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:47:46,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:47:46,412 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 11:47:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:46,434 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2023-02-15 11:47:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:47:46,436 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-15 11:47:46,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:46,441 INFO L225 Difference]: With dead ends: 61 [2023-02-15 11:47:46,442 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 11:47:46,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:47:46,447 INFO L413 NwaCegarLoop]: 41 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, 41 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 11:47:46,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:46,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 11:47:46,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-15 11:47:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 11:47:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-15 11:47:46,477 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2023-02-15 11:47:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:46,478 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-15 11:47:46,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 11:47:46,479 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-15 11:47:46,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 11:47:46,481 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:46,481 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:46,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 11:47:46,685 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 11:47:46,686 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:46,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2023-02-15 11:47:46,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:46,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805852027] [2023-02-15 11:47:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:46,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:46,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:46,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219452954] [2023-02-15 11:47:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:46,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:46,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:46,706 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 11:47:46,708 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 11:47:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:46,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:47:46,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:46,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:46,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805852027] [2023-02-15 11:47:46,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:46,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219452954] [2023-02-15 11:47:46,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219452954] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:46,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:46,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:47:46,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759131522] [2023-02-15 11:47:46,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:46,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:47:46,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:46,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:47:46,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:47:46,821 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:47:46,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:46,834 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-02-15 11:47:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:47:46,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-15 11:47:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:46,835 INFO L225 Difference]: With dead ends: 37 [2023-02-15 11:47:46,835 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 11:47:46,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 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 11:47:46,836 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:46,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 11:47:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-15 11:47:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 11:47:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-15 11:47:46,841 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2023-02-15 11:47:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:46,842 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-15 11:47:46,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:47:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-15 11:47:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 11:47:46,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:46,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:46,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:47,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 11:47:47,050 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:47,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2023-02-15 11:47:47,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:47,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687352281] [2023-02-15 11:47:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:47,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:47,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:47,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867488852] [2023-02-15 11:47:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:47,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:47,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:47,093 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 11:47:47,096 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 11:47:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:47,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 11:47:47,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:47:47,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:47,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:47,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687352281] [2023-02-15 11:47:47,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:47,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867488852] [2023-02-15 11:47:47,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867488852] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:47,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:47,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 11:47:47,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816320903] [2023-02-15 11:47:47,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:47,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 11:47:47,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:47,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 11:47:47,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:47:47,253 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:47:49,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:47:50,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:50,643 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2023-02-15 11:47:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 11:47:50,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-15 11:47:50,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:50,644 INFO L225 Difference]: With dead ends: 49 [2023-02-15 11:47:50,644 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 11:47:50,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:47:50,645 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:50,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 122 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-02-15 11:47:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 11:47:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-15 11:47:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 11:47:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2023-02-15 11:47:50,655 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2023-02-15 11:47:50,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:50,656 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2023-02-15 11:47:50,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:47:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2023-02-15 11:47:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 11:47:50,656 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:50,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:50,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 11:47:50,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:50,861 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:50,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:50,862 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2023-02-15 11:47:50,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:50,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322544139] [2023-02-15 11:47:50,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:50,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:50,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:50,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130740105] [2023-02-15 11:47:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:50,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:50,870 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 11:47:50,872 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 11:47:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:50,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 11:47:50,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:50,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:51,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:51,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322544139] [2023-02-15 11:47:51,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:51,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130740105] [2023-02-15 11:47:51,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130740105] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:51,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:51,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-02-15 11:47:51,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350394804] [2023-02-15 11:47:51,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:51,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 11:47:51,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:51,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 11:47:51,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-15 11:47:51,037 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 11:47:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:51,242 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-02-15 11:47:51,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 11:47:51,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2023-02-15 11:47:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:51,243 INFO L225 Difference]: With dead ends: 53 [2023-02-15 11:47:51,243 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 11:47:51,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:47:51,245 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:51,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 139 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:47:51,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 11:47:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2023-02-15 11:47:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 11:47:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-02-15 11:47:51,252 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2023-02-15 11:47:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:51,252 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-02-15 11:47:51,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 11:47:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-02-15 11:47:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 11:47:51,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:51,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:51,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 11:47:51,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:51,458 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:51,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2023-02-15 11:47:51,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:51,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777820571] [2023-02-15 11:47:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:51,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:51,465 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:51,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421276777] [2023-02-15 11:47:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:51,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:51,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:51,467 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 11:47:51,468 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 11:47:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:51,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 11:47:51,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:51,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:51,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:51,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777820571] [2023-02-15 11:47:51,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:51,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421276777] [2023-02-15 11:47:51,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421276777] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:51,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:51,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 11:47:51,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9996729] [2023-02-15 11:47:51,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:51,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:47:51,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:51,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:47:51,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:47:51,541 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 11:47:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:51,567 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2023-02-15 11:47:51,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 11:47:51,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-15 11:47:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:51,568 INFO L225 Difference]: With dead ends: 61 [2023-02-15 11:47:51,568 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 11:47:51,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 11:47:51,569 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 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 11:47:51,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 11:47:51,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-02-15 11:47:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 11:47:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-15 11:47:51,577 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2023-02-15 11:47:51,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:51,578 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-15 11:47:51,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 11:47:51,578 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-15 11:47:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 11:47:51,579 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:51,579 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:51,585 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 11:47:51,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:51,783 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:51,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2023-02-15 11:47:51,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:51,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348712644] [2023-02-15 11:47:51,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:51,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:51,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:51,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480066850] [2023-02-15 11:47:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:51,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:51,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:51,792 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 11:47:51,794 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 11:47:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:51,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 11:47:51,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:51,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 11:47:51,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:51,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348712644] [2023-02-15 11:47:51,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:51,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480066850] [2023-02-15 11:47:51,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480066850] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 11:47:51,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:47:51,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-02-15 11:47:51,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680289519] [2023-02-15 11:47:51,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:51,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 11:47:51,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 11:47:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:47:51,948 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 11:47:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:51,974 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2023-02-15 11:47:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:47:51,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2023-02-15 11:47:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:51,976 INFO L225 Difference]: With dead ends: 70 [2023-02-15 11:47:51,976 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 11:47:51,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:47:51,977 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:51,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 114 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 11:47:51,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-02-15 11:47:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 11:47:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-02-15 11:47:51,986 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2023-02-15 11:47:51,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:51,986 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-02-15 11:47:51,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 11:47:51,987 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-02-15 11:47:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 11:47:51,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:51,987 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:52,003 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 11:47:52,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:52,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:52,193 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2023-02-15 11:47:52,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:52,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766686543] [2023-02-15 11:47:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:52,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:52,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:52,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519370182] [2023-02-15 11:47:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:52,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:52,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:52,200 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 11:47:52,256 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 11:47:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:52,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 11:47:52,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:52,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 11:47:52,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:52,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766686543] [2023-02-15 11:47:52,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:52,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519370182] [2023-02-15 11:47:52,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519370182] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:52,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:52,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 11:47:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757242582] [2023-02-15 11:47:52,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:52,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:47:52,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:47:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:47:52,385 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 11:47:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:52,510 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2023-02-15 11:47:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 11:47:52,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2023-02-15 11:47:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:52,511 INFO L225 Difference]: With dead ends: 125 [2023-02-15 11:47:52,511 INFO L226 Difference]: Without dead ends: 104 [2023-02-15 11:47:52,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:47:52,512 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 62 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:52,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 215 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:47:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-15 11:47:52,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2023-02-15 11:47:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-15 11:47:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2023-02-15 11:47:52,544 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2023-02-15 11:47:52,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:52,544 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2023-02-15 11:47:52,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 11:47:52,544 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2023-02-15 11:47:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 11:47:52,545 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:52,545 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:52,552 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 11:47:52,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:52,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2023-02-15 11:47:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:52,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402995809] [2023-02-15 11:47:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:52,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:52,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302421618] [2023-02-15 11:47:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:52,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:52,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:52,759 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 11:47:52,761 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 11:47:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:52,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:47:52,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 11:47:52,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:52,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:52,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402995809] [2023-02-15 11:47:52,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:52,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302421618] [2023-02-15 11:47:52,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302421618] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:52,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:52,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 11:47:52,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854963272] [2023-02-15 11:47:52,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:52,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:47:52,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:52,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:47:52,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:47:52,837 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 11:47:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:52,883 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2023-02-15 11:47:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:47:52,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2023-02-15 11:47:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:52,886 INFO L225 Difference]: With dead ends: 154 [2023-02-15 11:47:52,886 INFO L226 Difference]: Without dead ends: 115 [2023-02-15 11:47:52,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:47:52,887 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:52,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 109 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-15 11:47:52,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2023-02-15 11:47:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-15 11:47:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2023-02-15 11:47:52,909 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2023-02-15 11:47:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:52,909 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2023-02-15 11:47:52,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 11:47:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2023-02-15 11:47:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 11:47:52,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:52,910 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:52,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 11:47:53,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-15 11:47:53,115 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:53,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:53,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2023-02-15 11:47:53,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:53,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018494363] [2023-02-15 11:47:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:53,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:53,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:53,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716495785] [2023-02-15 11:47:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:53,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:53,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:53,136 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 11:47:53,177 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 11:47:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:53,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 11:47:53,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:53,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 11:47:53,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:53,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018494363] [2023-02-15 11:47:53,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:53,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716495785] [2023-02-15 11:47:53,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716495785] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:53,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:53,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-02-15 11:47:53,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855479045] [2023-02-15 11:47:53,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:53,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 11:47:53,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:53,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 11:47:53,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-02-15 11:47:53,310 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-15 11:47:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:53,447 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2023-02-15 11:47:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 11:47:53,447 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2023-02-15 11:47:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:53,448 INFO L225 Difference]: With dead ends: 215 [2023-02-15 11:47:53,448 INFO L226 Difference]: Without dead ends: 168 [2023-02-15 11:47:53,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-02-15 11:47:53,449 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 107 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:53,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 234 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:47:53,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-15 11:47:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2023-02-15 11:47:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-15 11:47:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2023-02-15 11:47:53,486 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2023-02-15 11:47:53,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:53,487 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2023-02-15 11:47:53,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-15 11:47:53,487 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2023-02-15 11:47:53,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 11:47:53,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:53,488 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:53,503 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 11:47:53,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:53,693 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2023-02-15 11:47:53,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:53,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184904669] [2023-02-15 11:47:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:53,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:53,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:53,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280078543] [2023-02-15 11:47:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:53,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:53,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:53,701 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 11:47:53,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 11:47:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:53,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 11:47:53,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:53,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 11:47:53,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:53,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184904669] [2023-02-15 11:47:53,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:53,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280078543] [2023-02-15 11:47:53,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280078543] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:53,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:53,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-15 11:47:53,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26491706] [2023-02-15 11:47:53,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:53,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 11:47:53,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:53,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 11:47:53,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:47:53,870 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-02-15 11:47:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:54,044 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2023-02-15 11:47:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 11:47:54,044 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2023-02-15 11:47:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:54,045 INFO L225 Difference]: With dead ends: 207 [2023-02-15 11:47:54,046 INFO L226 Difference]: Without dead ends: 202 [2023-02-15 11:47:54,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:47:54,046 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 130 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:54,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 234 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:47:54,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-15 11:47:54,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2023-02-15 11:47:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-15 11:47:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2023-02-15 11:47:54,074 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2023-02-15 11:47:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:54,074 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2023-02-15 11:47:54,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-02-15 11:47:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2023-02-15 11:47:54,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 11:47:54,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:54,076 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:54,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:54,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 11:47:54,280 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:54,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:54,281 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2023-02-15 11:47:54,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:54,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976082356] [2023-02-15 11:47:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:54,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:54,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:54,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090274729] [2023-02-15 11:47:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:54,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:54,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:54,289 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:54,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 11:47:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 11:47:54,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-15 11:47:54,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-02-15 11:47:54,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:54,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976082356] [2023-02-15 11:47:54,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:54,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090274729] [2023-02-15 11:47:54,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090274729] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:54,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:54,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2023-02-15 11:47:54,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946497518] [2023-02-15 11:47:54,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:54,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:47:54,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:54,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:47:54,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:47:54,439 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 11:47:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:54,524 INFO L93 Difference]: Finished difference Result 498 states and 693 transitions. [2023-02-15 11:47:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 11:47:54,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-02-15 11:47:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:54,528 INFO L225 Difference]: With dead ends: 498 [2023-02-15 11:47:54,528 INFO L226 Difference]: Without dead ends: 355 [2023-02-15 11:47:54,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:47:54,529 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 15 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:54,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:54,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-02-15 11:47:54,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2023-02-15 11:47:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 260 states have internal predecessors, (322), 72 states have call successors, (72), 12 states have call predecessors, (72), 11 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2023-02-15 11:47:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 465 transitions. [2023-02-15 11:47:54,581 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 465 transitions. Word has length 87 [2023-02-15 11:47:54,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:54,581 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 465 transitions. [2023-02-15 11:47:54,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 11:47:54,581 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 465 transitions. [2023-02-15 11:47:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 11:47:54,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:54,583 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:54,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:54,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 11:47:54,788 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:54,788 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2023-02-15 11:47:54,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:54,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878285885] [2023-02-15 11:47:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:54,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:54,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:54,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963782473] [2023-02-15 11:47:54,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:47:54,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:54,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:54,813 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:54,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 11:47:54,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:47:54,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:47:54,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 11:47:54,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 11:47:54,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-02-15 11:47:55,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:55,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878285885] [2023-02-15 11:47:55,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:55,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963782473] [2023-02-15 11:47:55,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963782473] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:55,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:55,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-02-15 11:47:55,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162942694] [2023-02-15 11:47:55,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:55,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 11:47:55,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:55,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 11:47:55,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:47:55,139 INFO L87 Difference]: Start difference. First operand 338 states and 465 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-15 11:47:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:55,563 INFO L93 Difference]: Finished difference Result 981 states and 1419 transitions. [2023-02-15 11:47:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 11:47:55,564 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) Word has length 87 [2023-02-15 11:47:55,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:55,570 INFO L225 Difference]: With dead ends: 981 [2023-02-15 11:47:55,570 INFO L226 Difference]: Without dead ends: 838 [2023-02-15 11:47:55,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 11:47:55,571 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 250 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:55,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 361 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:47:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2023-02-15 11:47:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 789. [2023-02-15 11:47:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 596 states have (on average 1.2684563758389262) internal successors, (756), 605 states have internal predecessors, (756), 175 states have call successors, (175), 18 states have call predecessors, (175), 17 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) [2023-02-15 11:47:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1105 transitions. [2023-02-15 11:47:55,693 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1105 transitions. Word has length 87 [2023-02-15 11:47:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:55,694 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1105 transitions. [2023-02-15 11:47:55,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-15 11:47:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1105 transitions. [2023-02-15 11:47:55,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-15 11:47:55,699 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:55,699 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:55,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:55,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 11:47:55,905 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2023-02-15 11:47:55,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:55,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084144879] [2023-02-15 11:47:55,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:55,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:55,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:55,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278824356] [2023-02-15 11:47:55,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:55,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:55,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:55,931 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:55,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 11:47:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:56,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 11:47:56,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:56,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-15 11:47:56,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:56,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084144879] [2023-02-15 11:47:56,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:56,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278824356] [2023-02-15 11:47:56,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278824356] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:56,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:56,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-02-15 11:47:56,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643749549] [2023-02-15 11:47:56,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:56,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 11:47:56,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:56,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 11:47:56,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-15 11:47:56,365 INFO L87 Difference]: Start difference. First operand 789 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-02-15 11:47:56,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:56,893 INFO L93 Difference]: Finished difference Result 1281 states and 1795 transitions. [2023-02-15 11:47:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 11:47:56,894 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 93 [2023-02-15 11:47:56,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:56,896 INFO L225 Difference]: With dead ends: 1281 [2023-02-15 11:47:56,896 INFO L226 Difference]: Without dead ends: 791 [2023-02-15 11:47:56,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 11:47:56,898 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 376 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:56,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 497 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:47:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2023-02-15 11:47:56,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 736. [2023-02-15 11:47:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 552 states have (on average 1.2210144927536233) internal successors, (674), 556 states have internal predecessors, (674), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 157 states have call predecessors, (161), 161 states have call successors, (161) [2023-02-15 11:47:56,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 997 transitions. [2023-02-15 11:47:56,975 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 997 transitions. Word has length 93 [2023-02-15 11:47:56,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:56,975 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 997 transitions. [2023-02-15 11:47:56,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-02-15 11:47:56,975 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 997 transitions. [2023-02-15 11:47:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-15 11:47:56,977 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:56,977 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:56,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 11:47:57,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 11:47:57,182 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:57,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2023-02-15 11:47:57,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:57,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180120180] [2023-02-15 11:47:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:57,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:57,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:57,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839527491] [2023-02-15 11:47:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:57,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:57,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:57,197 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:57,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 11:47:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:57,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 11:47:57,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:57,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-02-15 11:47:57,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:57,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180120180] [2023-02-15 11:47:57,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:57,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839527491] [2023-02-15 11:47:57,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839527491] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:57,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:57,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-02-15 11:47:57,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253608742] [2023-02-15 11:47:57,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:57,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 11:47:57,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:57,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 11:47:57,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-02-15 11:47:57,635 INFO L87 Difference]: Start difference. First operand 736 states and 997 transitions. Second operand has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-02-15 11:47:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:58,193 INFO L93 Difference]: Finished difference Result 846 states and 1157 transitions. [2023-02-15 11:47:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-15 11:47:58,193 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 99 [2023-02-15 11:47:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:58,196 INFO L225 Difference]: With dead ends: 846 [2023-02-15 11:47:58,196 INFO L226 Difference]: Without dead ends: 841 [2023-02-15 11:47:58,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 11:47:58,197 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 370 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:58,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 518 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:47:58,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2023-02-15 11:47:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 826. [2023-02-15 11:47:58,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 620 states have (on average 1.2) internal successors, (744), 626 states have internal predecessors, (744), 182 states have call successors, (182), 24 states have call predecessors, (182), 23 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2023-02-15 11:47:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1107 transitions. [2023-02-15 11:47:58,290 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1107 transitions. Word has length 99 [2023-02-15 11:47:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:58,290 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1107 transitions. [2023-02-15 11:47:58,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-02-15 11:47:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1107 transitions. [2023-02-15 11:47:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-02-15 11:47:58,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:58,293 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:58,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:58,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:58,498 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:58,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:58,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1985812011, now seen corresponding path program 3 times [2023-02-15 11:47:58,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:58,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145367890] [2023-02-15 11:47:58,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:58,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:58,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:58,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235361732] [2023-02-15 11:47:58,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:47:58,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:58,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:58,514 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:58,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 11:47:58,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 11:47:58,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:47:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 11:47:58,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2023-02-15 11:47:58,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:58,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:58,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145367890] [2023-02-15 11:47:58,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:58,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235361732] [2023-02-15 11:47:58,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235361732] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:58,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:58,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 11:47:58,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741105632] [2023-02-15 11:47:58,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:58,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 11:47:58,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:58,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 11:47:58,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 11:47:58,593 INFO L87 Difference]: Start difference. First operand 826 states and 1107 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 11:47:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:58,715 INFO L93 Difference]: Finished difference Result 1099 states and 1478 transitions. [2023-02-15 11:47:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:47:58,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 177 [2023-02-15 11:47:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:58,718 INFO L225 Difference]: With dead ends: 1099 [2023-02-15 11:47:58,718 INFO L226 Difference]: Without dead ends: 892 [2023-02-15 11:47:58,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:47:58,719 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:58,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 172 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:58,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2023-02-15 11:47:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 857. [2023-02-15 11:47:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 644 states have (on average 1.1770186335403727) internal successors, (758), 651 states have internal predecessors, (758), 184 states have call successors, (184), 29 states have call predecessors, (184), 28 states have return successors, (183), 176 states have call predecessors, (183), 183 states have call successors, (183) [2023-02-15 11:47:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1125 transitions. [2023-02-15 11:47:58,804 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1125 transitions. Word has length 177 [2023-02-15 11:47:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:58,804 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1125 transitions. [2023-02-15 11:47:58,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 11:47:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1125 transitions. [2023-02-15 11:47:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 11:47:58,807 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:58,807 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:58,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:59,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 11:47:59,011 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1858915778, now seen corresponding path program 4 times [2023-02-15 11:47:59,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:59,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965873319] [2023-02-15 11:47:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:59,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:59,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:59,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422335645] [2023-02-15 11:47:59,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:47:59,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:59,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:59,038 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:59,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 11:47:59,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:47:59,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:47:59,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 11:47:59,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2023-02-15 11:47:59,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:59,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:59,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965873319] [2023-02-15 11:47:59,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422335645] [2023-02-15 11:47:59,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422335645] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:59,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:59,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:47:59,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398177092] [2023-02-15 11:47:59,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:59,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 11:47:59,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:59,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 11:47:59,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 11:47:59,138 INFO L87 Difference]: Start difference. First operand 857 states and 1125 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 11:47:59,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:59,252 INFO L93 Difference]: Finished difference Result 1458 states and 1913 transitions. [2023-02-15 11:47:59,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 11:47:59,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 183 [2023-02-15 11:47:59,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:59,255 INFO L225 Difference]: With dead ends: 1458 [2023-02-15 11:47:59,256 INFO L226 Difference]: Without dead ends: 915 [2023-02-15 11:47:59,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 11:47:59,257 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:59,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 75 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2023-02-15 11:47:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 863. [2023-02-15 11:47:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 650 states have (on average 1.1753846153846155) internal successors, (764), 659 states have internal predecessors, (764), 184 states have call successors, (184), 29 states have call predecessors, (184), 28 states have return successors, (183), 174 states have call predecessors, (183), 183 states have call successors, (183) [2023-02-15 11:47:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1131 transitions. [2023-02-15 11:47:59,359 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1131 transitions. Word has length 183 [2023-02-15 11:47:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:59,359 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1131 transitions. [2023-02-15 11:47:59,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 11:47:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1131 transitions. [2023-02-15 11:47:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 11:47:59,362 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:59,362 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:59,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:59,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 11:47:59,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:59,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:59,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1116662802, now seen corresponding path program 5 times [2023-02-15 11:47:59,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:59,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343434891] [2023-02-15 11:47:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:59,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:59,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:59,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266041823] [2023-02-15 11:47:59,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:47:59,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:59,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:59,579 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:59,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 11:47:59,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-15 11:47:59,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:47:59,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 11:47:59,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2023-02-15 11:47:59,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:59,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:59,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343434891] [2023-02-15 11:47:59,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:59,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266041823] [2023-02-15 11:47:59,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266041823] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:59,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:59,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 11:47:59,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568836228] [2023-02-15 11:47:59,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:59,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:47:59,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:59,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:47:59,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:47:59,699 INFO L87 Difference]: Start difference. First operand 863 states and 1131 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 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 11:47:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:59,805 INFO L93 Difference]: Finished difference Result 883 states and 1150 transitions. [2023-02-15 11:47:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 11:47:59,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 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 183 [2023-02-15 11:47:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:59,808 INFO L225 Difference]: With dead ends: 883 [2023-02-15 11:47:59,809 INFO L226 Difference]: Without dead ends: 827 [2023-02-15 11:47:59,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 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 11:47:59,809 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:59,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 125 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:59,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2023-02-15 11:47:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 802. [2023-02-15 11:47:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 603 states have (on average 1.1691542288557213) internal successors, (705), 611 states have internal predecessors, (705), 175 states have call successors, (175), 24 states have call predecessors, (175), 23 states have return successors, (174), 166 states have call predecessors, (174), 174 states have call successors, (174) [2023-02-15 11:47:59,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1054 transitions. [2023-02-15 11:47:59,900 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1054 transitions. Word has length 183 [2023-02-15 11:47:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:59,901 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 1054 transitions. [2023-02-15 11:47:59,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 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 11:47:59,901 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1054 transitions. [2023-02-15 11:47:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 11:47:59,904 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:59,904 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:59,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 11:48:00,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 11:48:00,109 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:48:00,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:48:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash -670817854, now seen corresponding path program 6 times [2023-02-15 11:48:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:48:00,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448567299] [2023-02-15 11:48:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:48:00,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:48:00,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:48:00,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351151048] [2023-02-15 11:48:00,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:48:00,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:00,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:48:00,136 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:48:00,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 11:48:00,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 11:48:00,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:48:00,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:48:00,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:48:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2023-02-15 11:48:00,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:48:00,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:48:00,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448567299] [2023-02-15 11:48:00,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:48:00,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351151048] [2023-02-15 11:48:00,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351151048] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:48:00,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:48:00,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 11:48:00,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603815014] [2023-02-15 11:48:00,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:48:00,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:48:00,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:48:00,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:48:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:48:00,581 INFO L87 Difference]: Start difference. First operand 802 states and 1054 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 11:48:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:48:00,691 INFO L93 Difference]: Finished difference Result 849 states and 1103 transitions. [2023-02-15 11:48:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:48:00,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 183 [2023-02-15 11:48:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:48:00,694 INFO L225 Difference]: With dead ends: 849 [2023-02-15 11:48:00,694 INFO L226 Difference]: Without dead ends: 778 [2023-02-15 11:48:00,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:48:00,696 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:48:00,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 112 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:48:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2023-02-15 11:48:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 751. [2023-02-15 11:48:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 565 states have (on average 1.1628318584070796) internal successors, (657), 572 states have internal predecessors, (657), 162 states have call successors, (162), 24 states have call predecessors, (162), 23 states have return successors, (161), 154 states have call predecessors, (161), 161 states have call successors, (161) [2023-02-15 11:48:00,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 980 transitions. [2023-02-15 11:48:00,771 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 980 transitions. Word has length 183 [2023-02-15 11:48:00,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:48:00,775 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 980 transitions. [2023-02-15 11:48:00,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 11:48:00,775 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 980 transitions. [2023-02-15 11:48:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 11:48:00,777 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:48:00,777 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:48:00,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-15 11:48:00,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 11:48:00,982 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:48:00,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:48:00,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1332064508, now seen corresponding path program 7 times [2023-02-15 11:48:00,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:48:00,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683875177] [2023-02-15 11:48:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:48:00,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:48:00,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:48:00,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566867754] [2023-02-15 11:48:00,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:48:00,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:00,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:48:01,014 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:48:01,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 11:48:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:48:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 11:48:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:48:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 280 proven. 184 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-15 11:48:01,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:48:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 140 proven. 184 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2023-02-15 11:48:01,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:48:01,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683875177] [2023-02-15 11:48:01,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:48:01,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566867754] [2023-02-15 11:48:01,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566867754] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:48:01,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:48:01,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2023-02-15 11:48:01,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541007340] [2023-02-15 11:48:01,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:48:01,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:48:01,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:48:01,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:48:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:48:01,331 INFO L87 Difference]: Start difference. First operand 751 states and 980 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2023-02-15 11:48:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:48:02,004 INFO L93 Difference]: Finished difference Result 1716 states and 2271 transitions. [2023-02-15 11:48:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 11:48:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) Word has length 183 [2023-02-15 11:48:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:48:02,008 INFO L225 Difference]: With dead ends: 1716 [2023-02-15 11:48:02,008 INFO L226 Difference]: Without dead ends: 1519 [2023-02-15 11:48:02,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 350 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2023-02-15 11:48:02,009 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 126 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 11:48:02,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 889 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 11:48:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2023-02-15 11:48:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1310. [2023-02-15 11:48:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 985 states have (on average 1.1796954314720811) internal successors, (1162), 1001 states have internal predecessors, (1162), 301 states have call successors, (301), 24 states have call predecessors, (301), 23 states have return successors, (300), 284 states have call predecessors, (300), 300 states have call successors, (300) [2023-02-15 11:48:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1763 transitions. [2023-02-15 11:48:02,175 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1763 transitions. Word has length 183 [2023-02-15 11:48:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:48:02,175 INFO L495 AbstractCegarLoop]: Abstraction has 1310 states and 1763 transitions. [2023-02-15 11:48:02,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2023-02-15 11:48:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1763 transitions. [2023-02-15 11:48:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 11:48:02,179 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:48:02,179 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:48:02,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 11:48:02,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:02,384 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:48:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:48:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1762868398, now seen corresponding path program 8 times [2023-02-15 11:48:02,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:48:02,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629104603] [2023-02-15 11:48:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:48:02,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:48:02,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:48:02,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996123831] [2023-02-15 11:48:02,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:48:02,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:02,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:48:02,393 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:48:02,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 11:48:02,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:48:02,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:48:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 11:48:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:48:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-15 11:48:02,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:48:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2023-02-15 11:48:02,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:48:02,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629104603] [2023-02-15 11:48:02,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:48:02,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996123831] [2023-02-15 11:48:02,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996123831] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:48:02,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:48:02,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-02-15 11:48:02,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66924845] [2023-02-15 11:48:02,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:48:02,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 11:48:02,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:48:02,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 11:48:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:48:02,715 INFO L87 Difference]: Start difference. First operand 1310 states and 1763 transitions. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-02-15 11:48:03,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:48:03,692 INFO L93 Difference]: Finished difference Result 2710 states and 3671 transitions. [2023-02-15 11:48:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 11:48:03,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 183 [2023-02-15 11:48:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:48:03,710 INFO L225 Difference]: With dead ends: 2710 [2023-02-15 11:48:03,710 INFO L226 Difference]: Without dead ends: 2413 [2023-02-15 11:48:03,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 11:48:03,712 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 183 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:48:03,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 764 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:48:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2023-02-15 11:48:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1964. [2023-02-15 11:48:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1474 states have (on average 1.162822252374491) internal successors, (1714), 1502 states have internal predecessors, (1714), 466 states have call successors, (466), 24 states have call predecessors, (466), 23 states have return successors, (465), 437 states have call predecessors, (465), 465 states have call successors, (465) [2023-02-15 11:48:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 2645 transitions. [2023-02-15 11:48:04,000 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 2645 transitions. Word has length 183 [2023-02-15 11:48:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:48:04,000 INFO L495 AbstractCegarLoop]: Abstraction has 1964 states and 2645 transitions. [2023-02-15 11:48:04,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-02-15 11:48:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 2645 transitions. [2023-02-15 11:48:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 11:48:04,005 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:48:04,005 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:48:04,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 11:48:04,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:04,210 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:48:04,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:48:04,211 INFO L85 PathProgramCache]: Analyzing trace with hash 144972548, now seen corresponding path program 9 times [2023-02-15 11:48:04,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:48:04,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146133461] [2023-02-15 11:48:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:48:04,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:48:04,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:48:04,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625998180] [2023-02-15 11:48:04,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:48:04,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:04,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:48:04,238 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:48:04,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 11:48:06,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-15 11:48:06,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:48:06,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 11:48:06,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:48:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2023-02-15 11:48:06,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:48:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2023-02-15 11:48:06,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:48:06,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146133461] [2023-02-15 11:48:06,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:48:06,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625998180] [2023-02-15 11:48:06,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625998180] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:48:06,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:48:06,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2023-02-15 11:48:06,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584020288] [2023-02-15 11:48:06,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:48:06,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 11:48:06,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:48:06,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 11:48:06,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-02-15 11:48:06,687 INFO L87 Difference]: Start difference. First operand 1964 states and 2645 transitions. Second operand has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 18 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2023-02-15 11:48:08,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:48:08,745 INFO L93 Difference]: Finished difference Result 3248 states and 4391 transitions. [2023-02-15 11:48:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-15 11:48:08,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 18 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) Word has length 183 [2023-02-15 11:48:08,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:48:08,753 INFO L225 Difference]: With dead ends: 3248 [2023-02-15 11:48:08,753 INFO L226 Difference]: Without dead ends: 2989 [2023-02-15 11:48:08,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 346 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=507, Invalid=2573, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 11:48:08,758 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 233 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:48:08,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 2273 Invalid, 2756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2586 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 11:48:08,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2023-02-15 11:48:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2458. [2023-02-15 11:48:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 1844 states have (on average 1.1719088937093276) internal successors, (2161), 1886 states have internal predecessors, (2161), 590 states have call successors, (590), 24 states have call predecessors, (590), 23 states have return successors, (589), 547 states have call predecessors, (589), 589 states have call successors, (589) [2023-02-15 11:48:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 3340 transitions. [2023-02-15 11:48:09,135 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 3340 transitions. Word has length 183 [2023-02-15 11:48:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:48:09,135 INFO L495 AbstractCegarLoop]: Abstraction has 2458 states and 3340 transitions. [2023-02-15 11:48:09,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 18 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2023-02-15 11:48:09,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 3340 transitions. [2023-02-15 11:48:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 11:48:09,141 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:48:09,141 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:48:09,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 11:48:09,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:09,347 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:48:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:48:09,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1027204868, now seen corresponding path program 10 times [2023-02-15 11:48:09,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:48:09,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116299563] [2023-02-15 11:48:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:48:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:48:09,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:48:09,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064137115] [2023-02-15 11:48:09,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:48:09,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:09,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:48:09,365 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:48:09,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 11:48:09,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:48:09,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:48:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 11:48:09,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:48:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:48:09,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:48:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2023-02-15 11:48:10,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:48:10,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116299563] [2023-02-15 11:48:10,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:48:10,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064137115] [2023-02-15 11:48:10,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064137115] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:48:10,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:48:10,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2023-02-15 11:48:10,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404791576] [2023-02-15 11:48:10,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:48:10,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 11:48:10,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:48:10,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 11:48:10,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 11:48:10,112 INFO L87 Difference]: Start difference. First operand 2458 states and 3340 transitions. Second operand has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2023-02-15 11:48:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:48:12,841 INFO L93 Difference]: Finished difference Result 9902 states and 14921 transitions. [2023-02-15 11:48:12,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-02-15 11:48:12,843 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) Word has length 183 [2023-02-15 11:48:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:48:12,873 INFO L225 Difference]: With dead ends: 9902 [2023-02-15 11:48:12,873 INFO L226 Difference]: Without dead ends: 9893 [2023-02-15 11:48:12,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2691, Invalid=4619, Unknown=0, NotChecked=0, Total=7310 [2023-02-15 11:48:12,877 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 915 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 11:48:12,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 856 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 11:48:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9893 states. [2023-02-15 11:48:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9893 to 9641. [2023-02-15 11:48:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9641 states, 7244 states have (on average 1.2642186637217008) internal successors, (9158), 7307 states have internal predecessors, (9158), 2353 states have call successors, (2353), 44 states have call predecessors, (2353), 43 states have return successors, (2352), 2289 states have call predecessors, (2352), 2352 states have call successors, (2352) [2023-02-15 11:48:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9641 states to 9641 states and 13863 transitions. [2023-02-15 11:48:14,455 INFO L78 Accepts]: Start accepts. Automaton has 9641 states and 13863 transitions. Word has length 183 [2023-02-15 11:48:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:48:14,455 INFO L495 AbstractCegarLoop]: Abstraction has 9641 states and 13863 transitions. [2023-02-15 11:48:14,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2023-02-15 11:48:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 9641 states and 13863 transitions. [2023-02-15 11:48:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-02-15 11:48:14,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:48:14,462 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:48:14,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 11:48:14,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:14,667 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:48:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:48:14,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1981009717, now seen corresponding path program 2 times [2023-02-15 11:48:14,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:48:14,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678386777] [2023-02-15 11:48:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:48:14,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:48:14,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:48:14,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630674860] [2023-02-15 11:48:14,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:48:14,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:14,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:48:14,676 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:48:14,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 11:48:14,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:48:14,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:48:14,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 11:48:14,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:48:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:48:15,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:48:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2023-02-15 11:48:15,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:48:15,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678386777] [2023-02-15 11:48:15,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:48:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630674860] [2023-02-15 11:48:15,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630674860] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:48:15,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:48:15,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 48 [2023-02-15 11:48:15,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147568688] [2023-02-15 11:48:15,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:48:15,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 11:48:15,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:48:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 11:48:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 11:48:15,804 INFO L87 Difference]: Start difference. First operand 9641 states and 13863 transitions. Second operand has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2023-02-15 11:48:18,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:48:18,343 INFO L93 Difference]: Finished difference Result 14788 states and 21459 transitions. [2023-02-15 11:48:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-02-15 11:48:18,343 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) Word has length 189 [2023-02-15 11:48:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:48:18,366 INFO L225 Difference]: With dead ends: 14788 [2023-02-15 11:48:18,366 INFO L226 Difference]: Without dead ends: 7693 [2023-02-15 11:48:18,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2864, Invalid=4968, Unknown=0, NotChecked=0, Total=7832 [2023-02-15 11:48:18,378 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 914 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 11:48:18,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 842 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 11:48:18,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2023-02-15 11:48:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 7466. [2023-02-15 11:48:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7466 states, 5599 states have (on average 1.1821753884622255) internal successors, (6619), 5643 states have internal predecessors, (6619), 1821 states have call successors, (1821), 46 states have call predecessors, (1821), 45 states have return successors, (1820), 1776 states have call predecessors, (1820), 1820 states have call successors, (1820) [2023-02-15 11:48:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7466 states to 7466 states and 10260 transitions. [2023-02-15 11:48:19,601 INFO L78 Accepts]: Start accepts. Automaton has 7466 states and 10260 transitions. Word has length 189 [2023-02-15 11:48:19,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:48:19,601 INFO L495 AbstractCegarLoop]: Abstraction has 7466 states and 10260 transitions. [2023-02-15 11:48:19,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2023-02-15 11:48:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 7466 states and 10260 transitions. [2023-02-15 11:48:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-02-15 11:48:19,608 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:48:19,608 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:48:19,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 11:48:19,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:19,812 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:48:19,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:48:19,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1075935086, now seen corresponding path program 2 times [2023-02-15 11:48:19,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:48:19,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000471946] [2023-02-15 11:48:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:48:19,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:48:19,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:48:19,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066827007] [2023-02-15 11:48:19,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:48:19,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:19,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:48:19,823 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:48:19,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 11:48:19,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:48:19,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:48:19,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 11:48:19,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:48:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:48:20,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:48:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2023-02-15 11:48:20,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:48:20,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000471946] [2023-02-15 11:48:20,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:48:20,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066827007] [2023-02-15 11:48:20,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066827007] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:48:20,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:48:20,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2023-02-15 11:48:20,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367997115] [2023-02-15 11:48:20,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:48:20,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 11:48:20,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:48:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 11:48:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 11:48:20,890 INFO L87 Difference]: Start difference. First operand 7466 states and 10260 transitions. Second operand has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2023-02-15 11:48:23,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:48:23,166 INFO L93 Difference]: Finished difference Result 8072 states and 11145 transitions. [2023-02-15 11:48:23,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-02-15 11:48:23,167 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) Word has length 195 [2023-02-15 11:48:23,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:48:23,180 INFO L225 Difference]: With dead ends: 8072 [2023-02-15 11:48:23,180 INFO L226 Difference]: Without dead ends: 7923 [2023-02-15 11:48:23,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3046, Invalid=5326, Unknown=0, NotChecked=0, Total=8372 [2023-02-15 11:48:23,183 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 768 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 11:48:23,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 828 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 11:48:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7923 states. [2023-02-15 11:48:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7923 to 7216. [2023-02-15 11:48:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7216 states, 5412 states have (on average 1.121212121212121) internal successors, (6068), 5456 states have internal predecessors, (6068), 1756 states have call successors, (1756), 48 states have call predecessors, (1756), 47 states have return successors, (1755), 1711 states have call predecessors, (1755), 1755 states have call successors, (1755) [2023-02-15 11:48:24,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7216 states to 7216 states and 9579 transitions. [2023-02-15 11:48:24,357 INFO L78 Accepts]: Start accepts. Automaton has 7216 states and 9579 transitions. Word has length 195 [2023-02-15 11:48:24,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:48:24,357 INFO L495 AbstractCegarLoop]: Abstraction has 7216 states and 9579 transitions. [2023-02-15 11:48:24,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2023-02-15 11:48:24,357 INFO L276 IsEmpty]: Start isEmpty. Operand 7216 states and 9579 transitions. [2023-02-15 11:48:24,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-02-15 11:48:24,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:48:24,375 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:48:24,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-15 11:48:24,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:24,580 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:48:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:48:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1339328528, now seen corresponding path program 11 times [2023-02-15 11:48:24,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:48:24,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216152317] [2023-02-15 11:48:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:48:24,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:48:24,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:48:24,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027096078] [2023-02-15 11:48:24,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:48:24,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:24,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:48:24,595 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:48:24,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 11:48:25,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-02-15 11:48:25,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:48:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 11:48:25,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:48:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 364 proven. 1120 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2023-02-15 11:48:25,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:48:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 364 proven. 1120 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2023-02-15 11:48:26,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:48:26,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216152317] [2023-02-15 11:48:26,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:48:26,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027096078] [2023-02-15 11:48:26,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027096078] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:48:26,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:48:26,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2023-02-15 11:48:26,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386224680] [2023-02-15 11:48:26,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:48:26,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 11:48:26,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:48:26,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 11:48:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 11:48:26,685 INFO L87 Difference]: Start difference. First operand 7216 states and 9579 transitions. Second operand has 38 states, 38 states have (on average 7.2105263157894735) internal successors, (274), 38 states have internal predecessors, (274), 38 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 37 states have call predecessors, (87), 37 states have call successors, (87) [2023-02-15 11:48:39,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:48:39,335 INFO L93 Difference]: Finished difference Result 18492 states and 24840 transitions. [2023-02-15 11:48:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-02-15 11:48:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 7.2105263157894735) internal successors, (274), 38 states have internal predecessors, (274), 38 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 37 states have call predecessors, (87), 37 states have call successors, (87) Word has length 375 [2023-02-15 11:48:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:48:39,367 INFO L225 Difference]: With dead ends: 18492 [2023-02-15 11:48:39,367 INFO L226 Difference]: Without dead ends: 16293 [2023-02-15 11:48:39,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5122 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4365, Invalid=15375, Unknown=0, NotChecked=0, Total=19740 [2023-02-15 11:48:39,379 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 1208 mSDsluCounter, 4080 mSDsCounter, 0 mSdLazyCounter, 6527 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 4630 SdHoareTripleChecker+Invalid, 7248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 6527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-02-15 11:48:39,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 4630 Invalid, 7248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 6527 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-02-15 11:48:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16293 states. [2023-02-15 11:48:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16293 to 11009. [2023-02-15 11:48:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11009 states, 8256 states have (on average 1.1242732558139534) internal successors, (9282), 8337 states have internal predecessors, (9282), 2705 states have call successors, (2705), 48 states have call predecessors, (2705), 47 states have return successors, (2704), 2623 states have call predecessors, (2704), 2704 states have call successors, (2704) [2023-02-15 11:48:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11009 states to 11009 states and 14691 transitions. [2023-02-15 11:48:41,944 INFO L78 Accepts]: Start accepts. Automaton has 11009 states and 14691 transitions. Word has length 375 [2023-02-15 11:48:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:48:41,944 INFO L495 AbstractCegarLoop]: Abstraction has 11009 states and 14691 transitions. [2023-02-15 11:48:41,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 7.2105263157894735) internal successors, (274), 38 states have internal predecessors, (274), 38 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 37 states have call predecessors, (87), 37 states have call successors, (87) [2023-02-15 11:48:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 11009 states and 14691 transitions. [2023-02-15 11:48:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-02-15 11:48:41,968 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:48:41,968 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:48:41,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-15 11:48:42,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-15 11:48:42,174 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:48:42,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:48:42,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2073406448, now seen corresponding path program 12 times [2023-02-15 11:48:42,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:48:42,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585542422] [2023-02-15 11:48:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:48:42,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:48:42,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:48:42,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510456741] [2023-02-15 11:48:42,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:48:42,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:42,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:48:42,188 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:48:42,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process