./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:06:39,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:06:39,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:06:39,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:06:39,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:06:39,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:06:39,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:06:39,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:06:39,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:06:39,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:06:39,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:06:39,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:06:39,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:06:39,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:06:39,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:06:39,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:06:39,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:06:39,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:06:39,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:06:39,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:06:39,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:06:39,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:06:39,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:06:39,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:06:39,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:06:39,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:06:39,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:06:39,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:06:39,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:06:39,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:06:39,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:06:39,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:06:39,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:06:39,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:06:39,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:06:39,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:06:39,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:06:39,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:06:39,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:06:39,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:06:39,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:06:39,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 21:06:39,697 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:06:39,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:06:39,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:06:39,698 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:06:39,699 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:06:39,699 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:06:39,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:06:39,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:06:39,700 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:06:39,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:06:39,700 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:06:39,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:06:39,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:06:39,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:06:39,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 21:06:39,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:06:39,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 21:06:39,701 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:06:39,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 21:06:39,701 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:06:39,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 21:06:39,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:06:39,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:06:39,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:06:39,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:06:39,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:06:39,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:06:39,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 21:06:39,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:06:39,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:06:39,703 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:06:39,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 21:06:39,703 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:06:39,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:06:39,704 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:06:39,704 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5 [2023-02-15 21:06:39,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:06:39,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:06:39,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:06:39,902 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:06:39,902 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:06:39,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c [2023-02-15 21:06:40,896 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:06:41,045 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:06:41,046 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c [2023-02-15 21:06:41,050 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aa9ed673/d28e3d3a0df6444ba3b7968e188a9cf3/FLAG6337efa9b [2023-02-15 21:06:41,060 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aa9ed673/d28e3d3a0df6444ba3b7968e188a9cf3 [2023-02-15 21:06:41,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:06:41,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:06:41,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:06:41,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:06:41,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:06:41,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd3c04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41, skipping insertion in model container [2023-02-15 21:06:41,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:06:41,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:06:41,173 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/hard2_unwindbound100.c[526,539] [2023-02-15 21:06:41,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:06:41,190 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:06:41,198 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/hard2_unwindbound100.c[526,539] [2023-02-15 21:06:41,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:06:41,213 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:06:41,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41 WrapperNode [2023-02-15 21:06:41,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:06:41,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:06:41,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:06:41,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:06:41,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,237 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-02-15 21:06:41,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:06:41,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:06:41,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:06:41,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:06:41,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,251 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:06:41,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:06:41,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:06:41,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:06:41,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41" (1/1) ... [2023-02-15 21:06:41,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:06:41,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:41,279 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 21:06:41,281 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 21:06:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:06:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:06:41,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:06:41,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:06:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 21:06:41,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 21:06:41,352 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:06:41,353 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:06:41,538 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:06:41,542 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:06:41,552 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 21:06:41,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:06:41 BoogieIcfgContainer [2023-02-15 21:06:41,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:06:41,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:06:41,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:06:41,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:06:41,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:06:41" (1/3) ... [2023-02-15 21:06:41,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da15554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:06:41, skipping insertion in model container [2023-02-15 21:06:41,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:06:41" (2/3) ... [2023-02-15 21:06:41,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da15554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:06:41, skipping insertion in model container [2023-02-15 21:06:41,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:06:41" (3/3) ... [2023-02-15 21:06:41,569 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound100.c [2023-02-15 21:06:41,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:06:41,600 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 21:06:41,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:06:41,660 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;@64866402, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:06:41,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 21:06:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:06:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 21:06:41,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:41,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:41,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:41,678 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2023-02-15 21:06:41,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:41,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244181762] [2023-02-15 21:06:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:41,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:41,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:41,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244181762] [2023-02-15 21:06:41,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 21:06:41,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641336913] [2023-02-15 21:06:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:41,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:41,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:41,794 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 21:06:41,796 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 21:06:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 21:06:41,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:06:41,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:06:41,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641336913] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:06:41,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:06:41,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:06:41,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161838706] [2023-02-15 21:06:41,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:06:41,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 21:06:41,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 21:06:41,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 21:06:41,912 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:06:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:41,925 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2023-02-15 21:06:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 21:06:41,927 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 21:06:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:41,931 INFO L225 Difference]: With dead ends: 50 [2023-02-15 21:06:41,931 INFO L226 Difference]: Without dead ends: 22 [2023-02-15 21:06:41,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 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 21:06:41,935 INFO L413 NwaCegarLoop]: 36 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, 36 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 21:06:41,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:06:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-15 21:06:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-15 21:06:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:06:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2023-02-15 21:06:41,958 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2023-02-15 21:06:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:41,959 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2023-02-15 21:06:41,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:06:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2023-02-15 21:06:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 21:06:41,960 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:41,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:41,977 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 21:06:42,185 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 21:06:42,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:42,186 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2023-02-15 21:06:42,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:42,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308590673] [2023-02-15 21:06:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:42,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:06:42,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:42,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308590673] [2023-02-15 21:06:42,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308590673] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:06:42,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:06:42,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:06:42,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434081045] [2023-02-15 21:06:42,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:06:42,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:06:42,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:42,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:06:42,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:06:42,323 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:06:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:42,372 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2023-02-15 21:06:42,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:06:42,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 21:06:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:42,374 INFO L225 Difference]: With dead ends: 36 [2023-02-15 21:06:42,375 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 21:06:42,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:06:42,376 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:42,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:06:42,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 21:06:42,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2023-02-15 21:06:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:06:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2023-02-15 21:06:42,387 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2023-02-15 21:06:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:42,387 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2023-02-15 21:06:42,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:06:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2023-02-15 21:06:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 21:06:42,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:42,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:42,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 21:06:42,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:42,392 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2023-02-15 21:06:42,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:42,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040363829] [2023-02-15 21:06:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:42,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:42,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:42,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040363829] [2023-02-15 21:06:42,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 21:06:42,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024365998] [2023-02-15 21:06:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:42,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:42,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:42,420 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 21:06:42,421 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 21:06:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:42,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 21:06:42,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:06:42,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:06:42,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024365998] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:06:42,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:06:42,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:06:42,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881463378] [2023-02-15 21:06:42,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:06:42,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:06:42,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:42,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:06:42,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:06:42,499 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:06:42,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:42,517 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2023-02-15 21:06:42,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:06:42,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 21:06:42,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:42,518 INFO L225 Difference]: With dead ends: 42 [2023-02-15 21:06:42,518 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 21:06:42,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 21:06:42,519 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:42,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:06:42,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 21:06:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-15 21:06:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:06:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-15 21:06:42,524 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-15 21:06:42,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:42,524 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-15 21:06:42,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:06:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-15 21:06:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 21:06:42,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:42,529 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:42,552 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 21:06:42,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 21:06:42,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:42,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2023-02-15 21:06:42,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:42,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155714487] [2023-02-15 21:06:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:42,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:42,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:06:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:06:42,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:42,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155714487] [2023-02-15 21:06:42,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155714487] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:06:42,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:06:42,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:06:42,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141063660] [2023-02-15 21:06:42,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:06:42,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:06:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:06:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:06:42,818 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:06:42,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:42,857 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-15 21:06:42,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:06:42,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-15 21:06:42,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:42,858 INFO L225 Difference]: With dead ends: 42 [2023-02-15 21:06:42,858 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 21:06:42,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:06:42,863 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:42,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:06:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 21:06:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-02-15 21:06:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:06:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-15 21:06:42,880 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2023-02-15 21:06:42,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:42,881 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-15 21:06:42,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:06:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-15 21:06:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 21:06:42,881 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:42,882 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:42,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 21:06:42,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:42,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:42,884 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2023-02-15 21:06:42,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:42,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810197544] [2023-02-15 21:06:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:42,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:42,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:42,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159769944] [2023-02-15 21:06:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:42,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:42,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:42,917 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 21:06:42,944 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 21:06:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:42,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 21:06:42,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:06:43,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:06:43,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810197544] [2023-02-15 21:06:43,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159769944] [2023-02-15 21:06:43,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159769944] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:43,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:43,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-15 21:06:43,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581847756] [2023-02-15 21:06:43,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:43,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 21:06:43,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:43,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 21:06:43,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:06:43,207 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:06:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:44,180 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2023-02-15 21:06:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:06:44,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2023-02-15 21:06:44,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:44,182 INFO L225 Difference]: With dead ends: 71 [2023-02-15 21:06:44,182 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 21:06:44,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:06:44,183 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:44,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 82 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 21:06:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 21:06:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2023-02-15 21:06:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 21:06:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2023-02-15 21:06:44,190 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2023-02-15 21:06:44,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:44,190 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2023-02-15 21:06:44,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:06:44,190 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2023-02-15 21:06:44,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 21:06:44,191 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:44,191 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:44,195 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 21:06:44,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:44,395 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:44,396 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2023-02-15 21:06:44,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:44,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695967676] [2023-02-15 21:06:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:44,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:44,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:44,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727374906] [2023-02-15 21:06:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:44,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:44,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:44,425 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 21:06:44,435 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 21:06:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:44,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 21:06:44,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:06:44,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:06:44,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:44,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695967676] [2023-02-15 21:06:44,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:44,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727374906] [2023-02-15 21:06:44,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727374906] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:44,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:44,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-15 21:06:44,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126926563] [2023-02-15 21:06:44,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:44,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 21:06:44,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 21:06:44,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:06:44,639 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 21:06:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:44,754 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2023-02-15 21:06:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 21:06:44,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2023-02-15 21:06:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:44,755 INFO L225 Difference]: With dead ends: 73 [2023-02-15 21:06:44,755 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 21:06:44,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:06:44,756 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:44,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 81 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:06:44,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 21:06:44,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2023-02-15 21:06:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 43 states have internal predecessors, (50), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-15 21:06:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2023-02-15 21:06:44,765 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 26 [2023-02-15 21:06:44,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:44,765 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2023-02-15 21:06:44,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 21:06:44,766 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2023-02-15 21:06:44,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 21:06:44,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:44,766 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:44,777 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 21:06:44,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:44,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:44,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:44,972 INFO L85 PathProgramCache]: Analyzing trace with hash 847666457, now seen corresponding path program 1 times [2023-02-15 21:06:44,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:44,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492253527] [2023-02-15 21:06:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:44,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:44,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:44,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794275245] [2023-02-15 21:06:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:44,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:44,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:44,998 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 21:06:45,002 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 21:06:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:45,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 21:06:45,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 21:06:45,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 21:06:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:45,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492253527] [2023-02-15 21:06:45,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:45,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794275245] [2023-02-15 21:06:45,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794275245] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:45,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:45,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-15 21:06:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684527087] [2023-02-15 21:06:45,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:45,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:06:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:06:45,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:06:45,100 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-15 21:06:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:45,165 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2023-02-15 21:06:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:06:45,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2023-02-15 21:06:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:45,167 INFO L225 Difference]: With dead ends: 165 [2023-02-15 21:06:45,167 INFO L226 Difference]: Without dead ends: 127 [2023-02-15 21:06:45,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:06:45,168 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:45,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 137 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:06:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-15 21:06:45,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2023-02-15 21:06:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 83 states have internal predecessors, (94), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-15 21:06:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2023-02-15 21:06:45,181 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 33 [2023-02-15 21:06:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:45,181 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2023-02-15 21:06:45,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-15 21:06:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2023-02-15 21:06:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 21:06:45,182 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:45,182 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:45,199 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 21:06:45,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:45,387 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:45,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:45,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2023-02-15 21:06:45,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:45,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647295944] [2023-02-15 21:06:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:45,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:45,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:45,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119696727] [2023-02-15 21:06:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:45,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:45,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:45,413 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 21:06:45,451 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 21:06:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:45,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 21:06:45,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 21:06:45,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-15 21:06:45,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:45,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647295944] [2023-02-15 21:06:45,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:45,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119696727] [2023-02-15 21:06:45,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119696727] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:45,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:45,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 21:06:45,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586508164] [2023-02-15 21:06:45,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:45,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 21:06:45,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:45,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 21:06:45,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:06:45,558 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-15 21:06:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:45,670 INFO L93 Difference]: Finished difference Result 249 states and 307 transitions. [2023-02-15 21:06:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:06:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2023-02-15 21:06:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:45,672 INFO L225 Difference]: With dead ends: 249 [2023-02-15 21:06:45,672 INFO L226 Difference]: Without dead ends: 228 [2023-02-15 21:06:45,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:06:45,673 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:45,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 261 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:06:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-15 21:06:45,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2023-02-15 21:06:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 155 states have internal predecessors, (172), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2023-02-15 21:06:45,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 270 transitions. [2023-02-15 21:06:45,694 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 270 transitions. Word has length 49 [2023-02-15 21:06:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:45,694 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 270 transitions. [2023-02-15 21:06:45,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-15 21:06:45,695 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 270 transitions. [2023-02-15 21:06:45,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 21:06:45,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:45,696 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:45,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 21:06:45,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:45,901 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:45,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:45,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2023-02-15 21:06:45,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:45,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887962805] [2023-02-15 21:06:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:45,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:45,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:45,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076944447] [2023-02-15 21:06:45,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:45,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:45,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:45,909 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 21:06:45,932 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 21:06:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:45,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 21:06:45,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 21:06:46,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:06:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 21:06:47,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:06:47,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887962805] [2023-02-15 21:06:47,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:06:47,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076944447] [2023-02-15 21:06:47,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076944447] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:06:47,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:06:47,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-02-15 21:06:47,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261578036] [2023-02-15 21:06:47,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:06:47,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 21:06:47,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:06:47,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 21:06:47,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:06:47,005 INFO L87 Difference]: Start difference. First operand 221 states and 270 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-15 21:06:54,530 WARN L233 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 48 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:06:55,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:57,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:59,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:06:59,389 INFO L93 Difference]: Finished difference Result 372 states and 479 transitions. [2023-02-15 21:06:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:06:59,390 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 58 [2023-02-15 21:06:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:06:59,392 INFO L225 Difference]: With dead ends: 372 [2023-02-15 21:06:59,392 INFO L226 Difference]: Without dead ends: 299 [2023-02-15 21:06:59,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-02-15 21:06:59,393 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 94 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-15 21:06:59,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 131 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 360 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2023-02-15 21:06:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-02-15 21:06:59,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 272. [2023-02-15 21:06:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.2258064516129032) internal successors, (228), 194 states have internal predecessors, (228), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-15 21:06:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2023-02-15 21:06:59,436 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 58 [2023-02-15 21:06:59,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:06:59,437 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2023-02-15 21:06:59,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-15 21:06:59,437 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2023-02-15 21:06:59,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 21:06:59,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:06:59,443 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:06:59,463 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 21:06:59,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:59,643 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:06:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:06:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2023-02-15 21:06:59,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:06:59,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523371287] [2023-02-15 21:06:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:59,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:06:59,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:06:59,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094022852] [2023-02-15 21:06:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:06:59,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:06:59,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:06:59,661 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 21:06:59,685 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 21:06:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:06:59,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 21:06:59,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:06:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-15 21:06:59,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:07:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-15 21:07:00,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:07:00,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523371287] [2023-02-15 21:07:00,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:07:00,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094022852] [2023-02-15 21:07:00,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094022852] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:07:00,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:07:00,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-15 21:07:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718055902] [2023-02-15 21:07:00,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:07:00,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 21:07:00,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:07:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 21:07:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-15 21:07:00,333 INFO L87 Difference]: Start difference. First operand 272 states and 338 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-15 21:07:01,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:07:01,186 INFO L93 Difference]: Finished difference Result 341 states and 423 transitions. [2023-02-15 21:07:01,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:07:01,187 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 69 [2023-02-15 21:07:01,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:07:01,188 INFO L225 Difference]: With dead ends: 341 [2023-02-15 21:07:01,188 INFO L226 Difference]: Without dead ends: 260 [2023-02-15 21:07:01,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:07:01,189 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:07:01,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 134 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 21:07:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-15 21:07:01,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2023-02-15 21:07:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 165 states have internal predecessors, (190), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-15 21:07:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2023-02-15 21:07:01,230 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 69 [2023-02-15 21:07:01,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:07:01,230 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2023-02-15 21:07:01,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-15 21:07:01,230 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2023-02-15 21:07:01,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:07:01,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:07:01,231 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:07:01,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 21:07:01,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 21:07:01,436 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:07:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:07:01,437 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2023-02-15 21:07:01,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:07:01,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298878273] [2023-02-15 21:07:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:07:01,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:07:01,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:07:01,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36597223] [2023-02-15 21:07:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:07:01,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:07:01,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:07:01,443 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 21:07:01,445 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 21:07:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:07:01,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 21:07:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:07:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-15 21:07:01,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:07:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-15 21:07:01,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:07:01,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298878273] [2023-02-15 21:07:01,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:07:01,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36597223] [2023-02-15 21:07:01,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36597223] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:07:01,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:07:01,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-15 21:07:01,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602745096] [2023-02-15 21:07:01,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:07:01,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 21:07:01,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:07:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 21:07:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:07:01,847 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-15 21:07:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:07:02,132 INFO L93 Difference]: Finished difference Result 263 states and 312 transitions. [2023-02-15 21:07:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:07:02,132 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 74 [2023-02-15 21:07:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:07:02,144 INFO L225 Difference]: With dead ends: 263 [2023-02-15 21:07:02,144 INFO L226 Difference]: Without dead ends: 218 [2023-02-15 21:07:02,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:07:02,145 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 18 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:07:02,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 273 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:07:02,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-15 21:07:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2023-02-15 21:07:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 147 states have internal predecessors, (166), 40 states have call successors, (40), 25 states have call predecessors, (40), 25 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-15 21:07:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 245 transitions. [2023-02-15 21:07:02,195 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 245 transitions. Word has length 74 [2023-02-15 21:07:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:07:02,195 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 245 transitions. [2023-02-15 21:07:02,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-15 21:07:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 245 transitions. [2023-02-15 21:07:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-15 21:07:02,196 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:07:02,197 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 21:07:02,217 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 21:07:02,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:07:02,402 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:07:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:07:02,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2023-02-15 21:07:02,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:07:02,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763376582] [2023-02-15 21:07:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:07:02,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:07:02,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:07:02,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104354128] [2023-02-15 21:07:02,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:07:02,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:07:02,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:07:02,410 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:07:02,428 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 21:07:02,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:07:02,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:07:02,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 21:07:02,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:07:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-15 21:07:02,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:07:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 58 refuted. 6 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-15 21:07:31,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:07:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763376582] [2023-02-15 21:07:31,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:07:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104354128] [2023-02-15 21:07:31,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104354128] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:07:31,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:07:31,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-02-15 21:07:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244909066] [2023-02-15 21:07:31,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:07:31,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 21:07:31,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:07:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 21:07:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=335, Unknown=3, NotChecked=0, Total=420 [2023-02-15 21:07:31,249 INFO L87 Difference]: Start difference. First operand 210 states and 245 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-15 21:07:56,561 WARN L233 SmtUtils]: Spent 24.08s on a formula simplification. DAG size of input: 172 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:08:00,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:02,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:07,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:11,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:08:11,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:11,541 INFO L93 Difference]: Finished difference Result 309 states and 397 transitions. [2023-02-15 21:08:11,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 21:08:11,541 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 90 [2023-02-15 21:08:11,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:11,543 INFO L225 Difference]: With dead ends: 309 [2023-02-15 21:08:11,543 INFO L226 Difference]: Without dead ends: 259 [2023-02-15 21:08:11,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=151, Invalid=548, Unknown=3, NotChecked=0, Total=702 [2023-02-15 21:08:11,544 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 104 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 162 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:11,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 350 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1151 Invalid, 2 Unknown, 0 Unchecked, 13.7s Time] [2023-02-15 21:08:11,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-15 21:08:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 246. [2023-02-15 21:08:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 166 states have (on average 1.2048192771084338) internal successors, (200), 174 states have internal predecessors, (200), 53 states have call successors, (53), 26 states have call predecessors, (53), 26 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2023-02-15 21:08:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 305 transitions. [2023-02-15 21:08:11,618 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 305 transitions. Word has length 90 [2023-02-15 21:08:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:11,619 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 305 transitions. [2023-02-15 21:08:11,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-15 21:08:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 305 transitions. [2023-02-15 21:08:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-15 21:08:11,622 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:11,622 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:11,628 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 21:08:11,822 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,SelfDestructingSolverStorable11 [2023-02-15 21:08:11,823 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:11,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:11,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2023-02-15 21:08:11,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:11,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012180111] [2023-02-15 21:08:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:11,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:11,845 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:11,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674595777] [2023-02-15 21:08:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:11,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:11,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:11,847 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 21:08:11,854 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 21:08:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:08:11,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 21:08:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-15 21:08:12,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-02-15 21:08:12,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:12,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012180111] [2023-02-15 21:08:12,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:12,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674595777] [2023-02-15 21:08:12,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674595777] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:08:12,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:08:12,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-15 21:08:12,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577663813] [2023-02-15 21:08:12,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:12,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:08:12,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:12,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:08:12,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:08:12,105 INFO L87 Difference]: Start difference. First operand 246 states and 305 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-15 21:08:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:12,489 INFO L93 Difference]: Finished difference Result 703 states and 939 transitions. [2023-02-15 21:08:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 21:08:12,490 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 96 [2023-02-15 21:08:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:12,495 INFO L225 Difference]: With dead ends: 703 [2023-02-15 21:08:12,495 INFO L226 Difference]: Without dead ends: 628 [2023-02-15 21:08:12,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-15 21:08:12,496 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 161 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:12,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 300 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:08:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-02-15 21:08:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 543. [2023-02-15 21:08:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 360 states have (on average 1.2805555555555554) internal successors, (461), 386 states have internal predecessors, (461), 130 states have call successors, (130), 52 states have call predecessors, (130), 52 states have return successors, (127), 104 states have call predecessors, (127), 127 states have call successors, (127) [2023-02-15 21:08:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 718 transitions. [2023-02-15 21:08:12,658 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 718 transitions. Word has length 96 [2023-02-15 21:08:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:12,658 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 718 transitions. [2023-02-15 21:08:12,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-15 21:08:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 718 transitions. [2023-02-15 21:08:12,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-15 21:08:12,659 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:12,659 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:12,664 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 21:08:12,864 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,SelfDestructingSolverStorable12 [2023-02-15 21:08:12,864 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:12,865 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2023-02-15 21:08:12,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:12,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787407150] [2023-02-15 21:08:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:12,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:12,871 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:12,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005042634] [2023-02-15 21:08:12,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:08:12,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:12,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:12,885 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 21:08:12,894 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 21:08:12,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:08:12,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:08:12,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 21:08:12,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-15 21:08:13,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-15 21:08:22,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:22,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787407150] [2023-02-15 21:08:22,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:22,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005042634] [2023-02-15 21:08:22,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005042634] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:08:22,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:08:22,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-02-15 21:08:22,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320357718] [2023-02-15 21:08:22,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:22,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 21:08:22,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:22,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 21:08:22,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:08:22,350 INFO L87 Difference]: Start difference. First operand 543 states and 718 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 21:08:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:30,655 INFO L93 Difference]: Finished difference Result 674 states and 887 transitions. [2023-02-15 21:08:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 21:08:30,656 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 101 [2023-02-15 21:08:30,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:30,660 INFO L225 Difference]: With dead ends: 674 [2023-02-15 21:08:30,660 INFO L226 Difference]: Without dead ends: 546 [2023-02-15 21:08:30,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2023-02-15 21:08:30,661 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 69 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:30,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 211 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-02-15 21:08:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-02-15 21:08:30,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 498. [2023-02-15 21:08:30,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 330 states have (on average 1.2333333333333334) internal successors, (407), 352 states have internal predecessors, (407), 114 states have call successors, (114), 53 states have call predecessors, (114), 53 states have return successors, (111), 92 states have call predecessors, (111), 111 states have call successors, (111) [2023-02-15 21:08:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 632 transitions. [2023-02-15 21:08:30,861 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 632 transitions. Word has length 101 [2023-02-15 21:08:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:30,861 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 632 transitions. [2023-02-15 21:08:30,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 21:08:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 632 transitions. [2023-02-15 21:08:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-15 21:08:30,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:30,862 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:30,869 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 21:08:31,071 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,SelfDestructingSolverStorable13 [2023-02-15 21:08:31,071 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1246855822, now seen corresponding path program 1 times [2023-02-15 21:08:31,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:31,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392673048] [2023-02-15 21:08:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:31,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:31,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:31,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892572139] [2023-02-15 21:08:31,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:31,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:31,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:31,087 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 21:08:31,088 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 21:08:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:08:31,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 21:08:31,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 21:08:31,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-15 21:08:31,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392673048] [2023-02-15 21:08:31,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892572139] [2023-02-15 21:08:31,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892572139] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:08:31,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:08:31,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-15 21:08:31,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813788554] [2023-02-15 21:08:31,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:31,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 21:08:31,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:31,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 21:08:31,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-15 21:08:31,396 INFO L87 Difference]: Start difference. First operand 498 states and 632 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-15 21:08:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:31,934 INFO L93 Difference]: Finished difference Result 986 states and 1288 transitions. [2023-02-15 21:08:31,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 21:08:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 104 [2023-02-15 21:08:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:31,938 INFO L225 Difference]: With dead ends: 986 [2023-02-15 21:08:31,938 INFO L226 Difference]: Without dead ends: 947 [2023-02-15 21:08:31,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-02-15 21:08:31,940 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 243 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:31,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 472 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:08:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-02-15 21:08:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 922. [2023-02-15 21:08:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 610 states have (on average 1.1704918032786886) internal successors, (714), 654 states have internal predecessors, (714), 223 states have call successors, (223), 89 states have call predecessors, (223), 88 states have return successors, (215), 178 states have call predecessors, (215), 215 states have call successors, (215) [2023-02-15 21:08:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1152 transitions. [2023-02-15 21:08:32,240 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1152 transitions. Word has length 104 [2023-02-15 21:08:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:32,241 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1152 transitions. [2023-02-15 21:08:32,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-15 21:08:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1152 transitions. [2023-02-15 21:08:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-15 21:08:32,243 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:32,243 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:32,248 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 21:08:32,447 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,SelfDestructingSolverStorable14 [2023-02-15 21:08:32,448 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:32,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1040094269, now seen corresponding path program 2 times [2023-02-15 21:08:32,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:32,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039021912] [2023-02-15 21:08:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:32,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:32,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:32,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566982510] [2023-02-15 21:08:32,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:08:32,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:32,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:32,474 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 21:08:32,479 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 21:08:32,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:08:32,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:08:32,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 21:08:32,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-15 21:08:32,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-15 21:08:34,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:34,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039021912] [2023-02-15 21:08:34,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:34,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566982510] [2023-02-15 21:08:34,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566982510] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:08:34,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:08:34,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2023-02-15 21:08:34,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149236227] [2023-02-15 21:08:34,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:34,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 21:08:34,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:34,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 21:08:34,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2023-02-15 21:08:34,572 INFO L87 Difference]: Start difference. First operand 922 states and 1152 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 23 states have internal predecessors, (56), 14 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2023-02-15 21:08:35,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:35,706 INFO L93 Difference]: Finished difference Result 1178 states and 1495 transitions. [2023-02-15 21:08:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 21:08:35,706 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 23 states have internal predecessors, (56), 14 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) Word has length 106 [2023-02-15 21:08:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:35,713 INFO L225 Difference]: With dead ends: 1178 [2023-02-15 21:08:35,713 INFO L226 Difference]: Without dead ends: 945 [2023-02-15 21:08:35,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:08:35,714 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 41 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:35,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 224 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:08:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2023-02-15 21:08:36,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 869. [2023-02-15 21:08:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 574 states have (on average 1.1724738675958188) internal successors, (673), 617 states have internal predecessors, (673), 210 states have call successors, (210), 85 states have call predecessors, (210), 84 states have return successors, (202), 166 states have call predecessors, (202), 202 states have call successors, (202) [2023-02-15 21:08:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1085 transitions. [2023-02-15 21:08:36,006 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1085 transitions. Word has length 106 [2023-02-15 21:08:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:36,006 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1085 transitions. [2023-02-15 21:08:36,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 23 states have internal predecessors, (56), 14 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2023-02-15 21:08:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1085 transitions. [2023-02-15 21:08:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-02-15 21:08:36,007 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:36,007 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-02-15 21:08:36,014 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 21:08:36,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:36,214 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:36,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2023-02-15 21:08:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:36,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565631176] [2023-02-15 21:08:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:36,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:36,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:36,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229320580] [2023-02-15 21:08:36,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:08:36,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:36,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:36,228 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 21:08:36,265 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 21:08:36,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 21:08:36,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:08:36,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 21:08:36,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 159 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-02-15 21:08:36,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:43,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:43,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565631176] [2023-02-15 21:08:43,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:43,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229320580] [2023-02-15 21:08:43,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229320580] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:08:43,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 21:08:43,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-15 21:08:43,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371202829] [2023-02-15 21:08:43,061 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:43,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 21:08:43,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:43,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 21:08:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:08:43,062 INFO L87 Difference]: Start difference. First operand 869 states and 1085 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 21:08:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:43,529 INFO L93 Difference]: Finished difference Result 947 states and 1162 transitions. [2023-02-15 21:08:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:08:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 122 [2023-02-15 21:08:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:43,533 INFO L225 Difference]: With dead ends: 947 [2023-02-15 21:08:43,533 INFO L226 Difference]: Without dead ends: 945 [2023-02-15 21:08:43,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-02-15 21:08:43,534 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:43,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 73 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:08:43,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2023-02-15 21:08:43,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 831. [2023-02-15 21:08:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 559 states have (on average 1.1663685152057246) internal successors, (652), 590 states have internal predecessors, (652), 192 states have call successors, (192), 80 states have call predecessors, (192), 79 states have return successors, (190), 160 states have call predecessors, (190), 190 states have call successors, (190) [2023-02-15 21:08:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1034 transitions. [2023-02-15 21:08:43,792 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1034 transitions. Word has length 122 [2023-02-15 21:08:43,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:43,793 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 1034 transitions. [2023-02-15 21:08:43,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 21:08:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1034 transitions. [2023-02-15 21:08:43,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-15 21:08:43,794 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:43,794 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:43,799 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 21:08:44,000 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,SelfDestructingSolverStorable16 [2023-02-15 21:08:44,001 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:44,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:44,001 INFO L85 PathProgramCache]: Analyzing trace with hash -507902292, now seen corresponding path program 3 times [2023-02-15 21:08:44,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:44,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312721873] [2023-02-15 21:08:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:44,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:44,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:44,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959098773] [2023-02-15 21:08:44,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:08:44,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:44,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:44,008 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 21:08:44,031 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 21:08:44,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 21:08:44,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:08:44,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 21:08:44,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 107 proven. 55 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-02-15 21:08:44,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2023-02-15 21:08:44,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:44,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312721873] [2023-02-15 21:08:44,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:44,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959098773] [2023-02-15 21:08:44,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959098773] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:08:44,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:08:44,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-02-15 21:08:44,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415030949] [2023-02-15 21:08:44,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:44,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:08:44,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:08:44,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:08:44,328 INFO L87 Difference]: Start difference. First operand 831 states and 1034 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 21:08:44,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:44,779 INFO L93 Difference]: Finished difference Result 941 states and 1123 transitions. [2023-02-15 21:08:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:08:44,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 124 [2023-02-15 21:08:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:44,782 INFO L225 Difference]: With dead ends: 941 [2023-02-15 21:08:44,782 INFO L226 Difference]: Without dead ends: 921 [2023-02-15 21:08:44,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-02-15 21:08:44,783 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:44,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 93 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:08:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-02-15 21:08:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 920. [2023-02-15 21:08:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 626 states have (on average 1.123003194888179) internal successors, (703), 658 states have internal predecessors, (703), 191 states have call successors, (191), 102 states have call predecessors, (191), 102 states have return successors, (189), 159 states have call predecessors, (189), 189 states have call successors, (189) [2023-02-15 21:08:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1083 transitions. [2023-02-15 21:08:45,025 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1083 transitions. Word has length 124 [2023-02-15 21:08:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:45,025 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1083 transitions. [2023-02-15 21:08:45,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 21:08:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1083 transitions. [2023-02-15 21:08:45,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-15 21:08:45,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:45,027 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:45,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-15 21:08:45,234 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,SelfDestructingSolverStorable17 [2023-02-15 21:08:45,234 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:45,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1989463840, now seen corresponding path program 3 times [2023-02-15 21:08:45,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:45,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256908789] [2023-02-15 21:08:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:45,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:45,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:45,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446369036] [2023-02-15 21:08:45,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:08:45,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:45,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:45,242 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 21:08:45,243 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 21:08:45,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 21:08:45,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:08:45,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 21:08:45,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-02-15 21:08:45,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-15 21:08:45,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:45,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256908789] [2023-02-15 21:08:45,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:45,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446369036] [2023-02-15 21:08:45,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446369036] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:08:45,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:08:45,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-02-15 21:08:45,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879847994] [2023-02-15 21:08:45,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:45,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 21:08:45,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:45,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 21:08:45,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-15 21:08:45,605 INFO L87 Difference]: Start difference. First operand 920 states and 1083 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 21:08:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:46,091 INFO L93 Difference]: Finished difference Result 927 states and 1089 transitions. [2023-02-15 21:08:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:08:46,091 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 133 [2023-02-15 21:08:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:46,096 INFO L225 Difference]: With dead ends: 927 [2023-02-15 21:08:46,096 INFO L226 Difference]: Without dead ends: 920 [2023-02-15 21:08:46,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 250 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-02-15 21:08:46,098 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:46,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 108 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:08:46,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2023-02-15 21:08:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 561. [2023-02-15 21:08:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 379 states have (on average 1.1029023746701847) internal successors, (418), 398 states have internal predecessors, (418), 109 states have call successors, (109), 72 states have call predecessors, (109), 72 states have return successors, (108), 90 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-15 21:08:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 635 transitions. [2023-02-15 21:08:46,336 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 635 transitions. Word has length 133 [2023-02-15 21:08:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:46,337 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 635 transitions. [2023-02-15 21:08:46,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 21:08:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 635 transitions. [2023-02-15 21:08:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-02-15 21:08:46,340 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:46,340 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:46,348 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 21:08:46,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:46,545 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:46,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:46,545 INFO L85 PathProgramCache]: Analyzing trace with hash 888958317, now seen corresponding path program 1 times [2023-02-15 21:08:46,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:46,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727863596] [2023-02-15 21:08:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:46,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:46,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:46,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907025174] [2023-02-15 21:08:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:46,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:46,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:46,575 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 21:08:46,577 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 21:08:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:08:46,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 21:08:46,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 2222 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-15 21:08:47,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2023-02-15 21:08:47,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:47,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727863596] [2023-02-15 21:08:47,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:47,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907025174] [2023-02-15 21:08:47,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907025174] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:08:47,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:08:47,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2023-02-15 21:08:47,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436744572] [2023-02-15 21:08:47,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:47,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 21:08:47,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 21:08:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:08:47,496 INFO L87 Difference]: Start difference. First operand 561 states and 635 transitions. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 29 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 28 states have call predecessors, (64), 28 states have call successors, (64) [2023-02-15 21:08:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:49,075 INFO L93 Difference]: Finished difference Result 1359 states and 1625 transitions. [2023-02-15 21:08:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-15 21:08:49,076 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 29 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 28 states have call predecessors, (64), 28 states have call successors, (64) Word has length 220 [2023-02-15 21:08:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:49,080 INFO L225 Difference]: With dead ends: 1359 [2023-02-15 21:08:49,080 INFO L226 Difference]: Without dead ends: 1346 [2023-02-15 21:08:49,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1212, Invalid=2210, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 21:08:49,081 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 573 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:49,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 831 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 21:08:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2023-02-15 21:08:49,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1345. [2023-02-15 21:08:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 907 states have (on average 1.113561190738699) internal successors, (1010), 958 states have internal predecessors, (1010), 269 states have call successors, (269), 168 states have call predecessors, (269), 168 states have return successors, (268), 218 states have call predecessors, (268), 268 states have call successors, (268) [2023-02-15 21:08:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1547 transitions. [2023-02-15 21:08:49,650 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1547 transitions. Word has length 220 [2023-02-15 21:08:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:49,651 INFO L495 AbstractCegarLoop]: Abstraction has 1345 states and 1547 transitions. [2023-02-15 21:08:49,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 29 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 28 states have call predecessors, (64), 28 states have call successors, (64) [2023-02-15 21:08:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1547 transitions. [2023-02-15 21:08:49,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-02-15 21:08:49,655 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:49,655 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 27, 26, 26, 26, 26, 26, 26, 26, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:49,660 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 21:08:49,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:49,860 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1525085741, now seen corresponding path program 2 times [2023-02-15 21:08:49,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:49,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300370504] [2023-02-15 21:08:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:49,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:49,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:49,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037378341] [2023-02-15 21:08:49,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:08:49,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:49,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:49,875 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 21:08:49,877 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 21:08:50,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:08:50,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:08:50,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-15 21:08:50,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:08:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 9950 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2023-02-15 21:08:50,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:08:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 2038 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-02-15 21:08:52,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:08:52,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300370504] [2023-02-15 21:08:52,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:08:52,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037378341] [2023-02-15 21:08:52,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037378341] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:08:52,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:08:52,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 66 [2023-02-15 21:08:52,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306012265] [2023-02-15 21:08:52,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:08:52,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-15 21:08:52,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:08:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-15 21:08:52,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2023-02-15 21:08:52,328 INFO L87 Difference]: Start difference. First operand 1345 states and 1547 transitions. Second operand has 66 states, 66 states have (on average 5.090909090909091) internal successors, (336), 66 states have internal predecessors, (336), 61 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 60 states have call predecessors, (128), 60 states have call successors, (128) [2023-02-15 21:08:56,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:08:56,493 INFO L93 Difference]: Finished difference Result 2927 states and 3513 transitions. [2023-02-15 21:08:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-02-15 21:08:56,494 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 5.090909090909091) internal successors, (336), 66 states have internal predecessors, (336), 61 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 60 states have call predecessors, (128), 60 states have call successors, (128) Word has length 444 [2023-02-15 21:08:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:08:56,501 INFO L225 Difference]: With dead ends: 2927 [2023-02-15 21:08:56,501 INFO L226 Difference]: Without dead ends: 2914 [2023-02-15 21:08:56,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5468, Invalid=9538, Unknown=0, NotChecked=0, Total=15006 [2023-02-15 21:08:56,504 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1741 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 1419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1419 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:08:56,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1741 Valid, 1265 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1419 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 21:08:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2023-02-15 21:08:57,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2913. [2023-02-15 21:08:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 1963 states have (on average 1.117677024961793) internal successors, (2194), 2078 states have internal predecessors, (2194), 589 states have call successors, (589), 360 states have call predecessors, (589), 360 states have return successors, (588), 474 states have call predecessors, (588), 588 states have call successors, (588) [2023-02-15 21:08:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 3371 transitions. [2023-02-15 21:08:57,762 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 3371 transitions. Word has length 444 [2023-02-15 21:08:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:08:57,763 INFO L495 AbstractCegarLoop]: Abstraction has 2913 states and 3371 transitions. [2023-02-15 21:08:57,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 5.090909090909091) internal successors, (336), 66 states have internal predecessors, (336), 61 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 60 states have call predecessors, (128), 60 states have call successors, (128) [2023-02-15 21:08:57,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 3371 transitions. [2023-02-15 21:08:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2023-02-15 21:08:57,777 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:08:57,777 INFO L195 NwaCegarLoop]: trace histogram [129, 128, 128, 59, 58, 58, 58, 58, 58, 58, 58, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:08:57,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-15 21:08:57,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:57,984 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:08:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:08:57,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1844250541, now seen corresponding path program 3 times [2023-02-15 21:08:57,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:08:57,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755683038] [2023-02-15 21:08:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:08:57,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:08:58,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:08:58,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513828331] [2023-02-15 21:08:58,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:08:58,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:08:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:08:58,010 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 21:08:58,012 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 21:09:10,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2023-02-15 21:09:10,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:09:10,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 21:09:10,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:09:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42838 backedges. 9933 proven. 69 refuted. 0 times theorem prover too weak. 32836 trivial. 0 not checked. [2023-02-15 21:09:11,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:09:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42838 backedges. 1509 proven. 69 refuted. 0 times theorem prover too weak. 41260 trivial. 0 not checked. [2023-02-15 21:09:11,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:09:11,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755683038] [2023-02-15 21:09:11,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:09:11,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513828331] [2023-02-15 21:09:11,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513828331] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:09:11,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:09:11,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2023-02-15 21:09:11,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386729418] [2023-02-15 21:09:11,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:09:11,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 21:09:11,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:09:11,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 21:09:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:09:11,540 INFO L87 Difference]: Start difference. First operand 2913 states and 3371 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 11 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2023-02-15 21:09:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:09:13,064 INFO L93 Difference]: Finished difference Result 4419 states and 5110 transitions. [2023-02-15 21:09:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 21:09:13,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 11 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) Word has length 892 [2023-02-15 21:09:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:09:13,074 INFO L225 Difference]: With dead ends: 4419 [2023-02-15 21:09:13,074 INFO L226 Difference]: Without dead ends: 2882 [2023-02-15 21:09:13,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1782 GetRequests, 1769 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:09:13,076 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 14 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:09:13,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 363 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:09:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2023-02-15 21:09:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2882. [2023-02-15 21:09:14,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 1942 states have (on average 1.11740473738414) internal successors, (2170), 2055 states have internal predecessors, (2170), 582 states have call successors, (582), 357 states have call predecessors, (582), 357 states have return successors, (581), 469 states have call predecessors, (581), 581 states have call successors, (581) [2023-02-15 21:09:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 3333 transitions. [2023-02-15 21:09:14,321 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 3333 transitions. Word has length 892 [2023-02-15 21:09:14,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:09:14,322 INFO L495 AbstractCegarLoop]: Abstraction has 2882 states and 3333 transitions. [2023-02-15 21:09:14,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 11 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2023-02-15 21:09:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 3333 transitions. [2023-02-15 21:09:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 897 [2023-02-15 21:09:14,331 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:09:14,332 INFO L195 NwaCegarLoop]: trace histogram [130, 129, 129, 58, 57, 57, 57, 57, 57, 57, 57, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:09:14,350 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 21:09:14,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-15 21:09:14,548 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:09:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:09:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2025620234, now seen corresponding path program 4 times [2023-02-15 21:09:14,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:09:14,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181066351] [2023-02-15 21:09:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:09:14,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:09:14,572 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:09:14,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794550099] [2023-02-15 21:09:14,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:09:14,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:09:14,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:09:14,589 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 21:09:14,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process