./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aefc568e9b7c922872a103ac050823e614044aea4bac2f22f2c586f3247176b4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 18:01:15,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 18:01:15,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 18:01:15,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 18:01:15,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 18:01:15,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 18:01:15,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 18:01:15,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 18:01:15,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 18:01:15,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 18:01:15,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 18:01:15,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 18:01:15,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 18:01:15,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 18:01:15,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 18:01:15,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 18:01:15,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 18:01:15,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 18:01:15,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 18:01:15,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 18:01:15,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 18:01:15,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 18:01:15,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 18:01:15,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 18:01:15,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 18:01:15,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 18:01:15,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 18:01:15,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 18:01:15,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 18:01:15,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 18:01:15,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 18:01:15,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 18:01:15,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 18:01:15,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 18:01:15,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 18:01:15,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 18:01:15,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 18:01:15,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 18:01:15,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 18:01:15,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 18:01:15,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 18:01:15,247 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 18:01:15,263 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 18:01:15,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 18:01:15,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 18:01:15,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 18:01:15,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 18:01:15,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 18:01:15,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 18:01:15,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 18:01:15,265 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 18:01:15,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 18:01:15,266 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 18:01:15,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 18:01:15,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 18:01:15,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 18:01:15,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 18:01:15,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 18:01:15,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 18:01:15,267 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 18:01:15,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 18:01:15,267 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 18:01:15,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 18:01:15,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 18:01:15,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 18:01:15,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 18:01:15,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 18:01:15,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 18:01:15,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 18:01:15,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 18:01:15,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 18:01:15,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 18:01:15,269 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 18:01:15,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 18:01:15,269 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 18:01:15,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 18:01:15,270 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 18:01:15,270 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aefc568e9b7c922872a103ac050823e614044aea4bac2f22f2c586f3247176b4 [2023-02-18 18:01:15,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 18:01:15,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 18:01:15,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 18:01:15,543 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 18:01:15,543 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 18:01:15,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c [2023-02-18 18:01:17,301 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 18:01:17,611 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 18:01:17,629 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c [2023-02-18 18:01:17,640 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c5dd0f8b/955be9600a114a3bb5e92d71bc8feaf9/FLAG2c39d884f [2023-02-18 18:01:17,659 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c5dd0f8b/955be9600a114a3bb5e92d71bc8feaf9 [2023-02-18 18:01:17,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 18:01:17,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 18:01:17,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 18:01:17,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 18:01:17,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 18:01:17,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:17,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600eb198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17, skipping insertion in model container [2023-02-18 18:01:17,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:17,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 18:01:17,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 18:01:17,877 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c[538,551] [2023-02-18 18:01:17,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 18:01:17,916 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 18:01:17,926 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c[538,551] [2023-02-18 18:01:17,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 18:01:17,954 INFO L208 MainTranslator]: Completed translation [2023-02-18 18:01:17,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17 WrapperNode [2023-02-18 18:01:17,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 18:01:17,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 18:01:17,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 18:01:17,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 18:01:17,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:17,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:18,010 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-18 18:01:18,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 18:01:18,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 18:01:18,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 18:01:18,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 18:01:18,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:18,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:18,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:18,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:18,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:18,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:18,042 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:18,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:18,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 18:01:18,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 18:01:18,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 18:01:18,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 18:01:18,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17" (1/1) ... [2023-02-18 18:01:18,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 18:01:18,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:18,090 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) [2023-02-18 18:01:18,116 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 [2023-02-18 18:01:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 18:01:18,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 18:01:18,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 18:01:18,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 18:01:18,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 18:01:18,131 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 18:01:18,183 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 18:01:18,185 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 18:01:18,387 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 18:01:18,393 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 18:01:18,393 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 18:01:18,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 06:01:18 BoogieIcfgContainer [2023-02-18 18:01:18,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 18:01:18,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 18:01:18,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 18:01:18,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 18:01:18,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 06:01:17" (1/3) ... [2023-02-18 18:01:18,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cda9e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 06:01:18, skipping insertion in model container [2023-02-18 18:01:18,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:01:17" (2/3) ... [2023-02-18 18:01:18,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cda9e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 06:01:18, skipping insertion in model container [2023-02-18 18:01:18,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 06:01:18" (3/3) ... [2023-02-18 18:01:18,418 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound50.c [2023-02-18 18:01:18,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 18:01:18,441 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 18:01:18,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 18:01:18,543 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;@d12a471, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 18:01:18,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 18:01:18,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 18:01:18,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 18:01:18,573 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:18,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:18,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:18,608 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2023-02-18 18:01:18,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:18,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350449532] [2023-02-18 18:01:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:18,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:18,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:18,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350449532] [2023-02-18 18:01:18,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 18:01:18,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324685394] [2023-02-18 18:01:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:18,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:18,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:18,906 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) [2023-02-18 18:01:18,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 18:01:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:18,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 18:01:18,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:01:19,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:01:19,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324685394] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:01:19,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:01:19,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 18:01:19,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561041279] [2023-02-18 18:01:19,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:01:19,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 18:01:19,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:19,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 18:01:19,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 18:01:19,101 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:01:19,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:19,124 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2023-02-18 18:01:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 18:01:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 18:01:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:19,130 INFO L225 Difference]: With dead ends: 53 [2023-02-18 18:01:19,130 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 18:01:19,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 18:01:19,135 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:19,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:01:19,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 18:01:19,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-18 18:01:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:01:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2023-02-18 18:01:19,173 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2023-02-18 18:01:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:19,173 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2023-02-18 18:01:19,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:01:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2023-02-18 18:01:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 18:01:19,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:19,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:19,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 18:01:19,385 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 [2023-02-18 18:01:19,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:19,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2023-02-18 18:01:19,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:19,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746215097] [2023-02-18 18:01:19,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:19,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:01:19,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:19,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746215097] [2023-02-18 18:01:19,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746215097] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:01:19,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:01:19,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:01:19,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645370716] [2023-02-18 18:01:19,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:01:19,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:01:19,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:19,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:01:19,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:01:19,786 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:01:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:19,891 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2023-02-18 18:01:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 18:01:19,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 18:01:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:19,894 INFO L225 Difference]: With dead ends: 38 [2023-02-18 18:01:19,896 INFO L226 Difference]: Without dead ends: 36 [2023-02-18 18:01:19,896 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 [2023-02-18 18:01:19,898 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:19,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:01:19,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-18 18:01:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2023-02-18 18:01:19,925 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) [2023-02-18 18:01:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-18 18:01:19,927 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-18 18:01:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:19,932 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-18 18:01:19,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:01:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-18 18:01:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 18:01:19,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:19,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:19,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 18:01:19,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:19,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2023-02-18 18:01:19,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:19,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145620367] [2023-02-18 18:01:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:19,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:19,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:19,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145620367] [2023-02-18 18:01:19,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 18:01:19,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164353948] [2023-02-18 18:01:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:19,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:19,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:19,985 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) [2023-02-18 18:01:19,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 18:01:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:20,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 18:01:20,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:01:20,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:01:20,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164353948] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:01:20,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:01:20,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 18:01:20,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945815367] [2023-02-18 18:01:20,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:01:20,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 18:01:20,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 18:01:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 18:01:20,113 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:01:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:20,156 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2023-02-18 18:01:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 18:01:20,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 18:01:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:20,158 INFO L225 Difference]: With dead ends: 44 [2023-02-18 18:01:20,158 INFO L226 Difference]: Without dead ends: 30 [2023-02-18 18:01:20,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 18:01:20,161 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:20,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:01:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-18 18:01:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-18 18:01:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:01:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-18 18:01:20,183 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2023-02-18 18:01:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:20,183 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-18 18:01:20,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:01:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-18 18:01:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 18:01:20,184 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:20,184 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:20,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 18:01:20,393 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 [2023-02-18 18:01:20,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:20,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2023-02-18 18:01:20,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:20,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476038967] [2023-02-18 18:01:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:20,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:20,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 18:01:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:01:20,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:20,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476038967] [2023-02-18 18:01:20,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476038967] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:01:20,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:01:20,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:01:20,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983080224] [2023-02-18 18:01:20,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:01:20,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:01:20,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:20,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:01:20,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:01:20,649 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 18:01:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:20,729 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2023-02-18 18:01:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 18:01:20,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-18 18:01:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:20,732 INFO L225 Difference]: With dead ends: 44 [2023-02-18 18:01:20,733 INFO L226 Difference]: Without dead ends: 42 [2023-02-18 18:01:20,733 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 [2023-02-18 18:01:20,734 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 13 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:20,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 102 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:01:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-18 18:01:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2023-02-18 18:01:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:01:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-18 18:01:20,757 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2023-02-18 18:01:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:20,757 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-18 18:01:20,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 18:01:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-18 18:01:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 18:01:20,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:20,759 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:20,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 18:01:20,759 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:20,760 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2023-02-18 18:01:20,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:20,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537580850] [2023-02-18 18:01:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:20,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:20,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:01:20,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933758376] [2023-02-18 18:01:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:20,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:20,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:20,783 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) [2023-02-18 18:01:20,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 18:01:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:20,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 18:01:20,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 18:01:20,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:01:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 18:01:21,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:21,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537580850] [2023-02-18 18:01:21,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:01:21,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933758376] [2023-02-18 18:01:21,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933758376] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:01:21,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:01:21,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-18 18:01:21,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125968674] [2023-02-18 18:01:21,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:01:21,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 18:01:21,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:21,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 18:01:21,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-18 18:01:21,215 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 18:01:21,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:21,368 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2023-02-18 18:01:21,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 18:01:21,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2023-02-18 18:01:21,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:21,370 INFO L225 Difference]: With dead ends: 75 [2023-02-18 18:01:21,370 INFO L226 Difference]: Without dead ends: 59 [2023-02-18 18:01:21,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-18 18:01:21,371 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:21,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 73 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:01:21,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-18 18:01:21,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2023-02-18 18:01:21,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 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) [2023-02-18 18:01:21,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-02-18 18:01:21,389 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 20 [2023-02-18 18:01:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:21,390 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-02-18 18:01:21,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 18:01:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-02-18 18:01:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 18:01:21,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:21,391 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:21,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 18:01:21,596 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 [2023-02-18 18:01:21,597 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:21,598 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2023-02-18 18:01:21,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:21,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074556161] [2023-02-18 18:01:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:21,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:01:21,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187549200] [2023-02-18 18:01:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:21,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:21,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:21,621 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) [2023-02-18 18:01:21,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 18:01:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:21,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 18:01:21,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 18:01:21,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:01:21,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:21,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074556161] [2023-02-18 18:01:21,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:01:21,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187549200] [2023-02-18 18:01:21,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187549200] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:01:21,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:01:21,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 18:01:21,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289290783] [2023-02-18 18:01:21,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:01:21,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:01:21,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:01:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:01:21,941 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 18:01:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:23,104 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2023-02-18 18:01:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 18:01:23,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-18 18:01:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:23,104 INFO L225 Difference]: With dead ends: 72 [2023-02-18 18:01:23,105 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 18:01:23,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:01:23,105 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:23,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 117 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 18:01:23,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 18:01:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-02-18 18:01:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 44 states have internal predecessors, (49), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 18:01:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2023-02-18 18:01:23,113 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 28 [2023-02-18 18:01:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:23,113 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2023-02-18 18:01:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 18:01:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2023-02-18 18:01:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 18:01:23,113 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:23,113 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:23,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 18:01:23,317 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 [2023-02-18 18:01:23,317 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:23,318 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2023-02-18 18:01:23,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:23,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055898330] [2023-02-18 18:01:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:23,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:23,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:01:23,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417232045] [2023-02-18 18:01:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:23,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:23,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:23,330 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) [2023-02-18 18:01:23,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 18:01:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:23,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 18:01:23,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 18:01:23,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:01:23,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:23,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055898330] [2023-02-18 18:01:23,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:01:23,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417232045] [2023-02-18 18:01:23,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417232045] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:01:23,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:01:23,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 18:01:23,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093253851] [2023-02-18 18:01:23,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:01:23,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 18:01:23,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:23,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 18:01:23,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 18:01:23,678 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 18:01:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:23,842 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-02-18 18:01:23,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 18:01:23,843 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-18 18:01:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:23,844 INFO L225 Difference]: With dead ends: 71 [2023-02-18 18:01:23,844 INFO L226 Difference]: Without dead ends: 59 [2023-02-18 18:01:23,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-02-18 18:01:23,845 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 44 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:23,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 111 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:01:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-18 18:01:23,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-02-18 18:01:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 18:01:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2023-02-18 18:01:23,862 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2023-02-18 18:01:23,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:23,863 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2023-02-18 18:01:23,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 18:01:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2023-02-18 18:01:23,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 18:01:23,864 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:23,864 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:23,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 18:01:24,068 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 [2023-02-18 18:01:24,069 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:24,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1040101153, now seen corresponding path program 1 times [2023-02-18 18:01:24,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:24,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952152698] [2023-02-18 18:01:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:24,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:24,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:01:24,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644288745] [2023-02-18 18:01:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:24,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:24,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:24,116 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) [2023-02-18 18:01:24,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 18:01:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:24,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 18:01:24,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 18:01:24,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:01:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 18:01:24,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:24,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952152698] [2023-02-18 18:01:24,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:01:24,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644288745] [2023-02-18 18:01:24,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644288745] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:01:24,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:01:24,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 18:01:24,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224309721] [2023-02-18 18:01:24,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:01:24,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 18:01:24,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:24,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 18:01:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 18:01:24,439 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 18:01:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:24,526 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2023-02-18 18:01:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 18:01:24,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2023-02-18 18:01:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:24,533 INFO L225 Difference]: With dead ends: 137 [2023-02-18 18:01:24,533 INFO L226 Difference]: Without dead ends: 114 [2023-02-18 18:01:24,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-18 18:01:24,534 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 34 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:24,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 212 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:01:24,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-18 18:01:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2023-02-18 18:01:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 75 states have internal predecessors, (82), 24 states have call successors, (24), 14 states have call predecessors, (24), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 18:01:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2023-02-18 18:01:24,546 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 30 [2023-02-18 18:01:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:24,546 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2023-02-18 18:01:24,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 18:01:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2023-02-18 18:01:24,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 18:01:24,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:24,547 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:24,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 18:01:24,753 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 [2023-02-18 18:01:24,753 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:24,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:24,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2101649637, now seen corresponding path program 1 times [2023-02-18 18:01:24,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:24,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830251687] [2023-02-18 18:01:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:24,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:24,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:01:24,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974329501] [2023-02-18 18:01:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:24,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:24,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:24,765 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) [2023-02-18 18:01:24,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 18:01:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:24,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 18:01:24,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 18:01:24,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:01:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 18:01:24,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:24,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830251687] [2023-02-18 18:01:24,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:01:24,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974329501] [2023-02-18 18:01:24,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974329501] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:01:24,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:01:24,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-18 18:01:24,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155832026] [2023-02-18 18:01:24,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:01:24,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 18:01:24,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 18:01:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 18:01:24,938 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 18:01:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:25,122 INFO L93 Difference]: Finished difference Result 197 states and 233 transitions. [2023-02-18 18:01:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 18:01:25,123 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2023-02-18 18:01:25,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:25,124 INFO L225 Difference]: With dead ends: 197 [2023-02-18 18:01:25,124 INFO L226 Difference]: Without dead ends: 183 [2023-02-18 18:01:25,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-18 18:01:25,125 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 91 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:25,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 235 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:01:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-02-18 18:01:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 176. [2023-02-18 18:01:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 115 states have (on average 1.182608695652174) internal successors, (136), 123 states have internal predecessors, (136), 38 states have call successors, (38), 22 states have call predecessors, (38), 22 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 18:01:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2023-02-18 18:01:25,146 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 46 [2023-02-18 18:01:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:25,146 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2023-02-18 18:01:25,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 18:01:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2023-02-18 18:01:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 18:01:25,155 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:25,155 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:25,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 18:01:25,380 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 [2023-02-18 18:01:25,381 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:25,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:25,381 INFO L85 PathProgramCache]: Analyzing trace with hash 2103377515, now seen corresponding path program 1 times [2023-02-18 18:01:25,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:25,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662305296] [2023-02-18 18:01:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:25,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:25,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:01:25,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716260330] [2023-02-18 18:01:25,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:25,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:25,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:25,401 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) [2023-02-18 18:01:25,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 18:01:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:25,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 18:01:25,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 18:01:25,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:01:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 18:01:25,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:25,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662305296] [2023-02-18 18:01:25,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:01:25,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716260330] [2023-02-18 18:01:25,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716260330] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:01:25,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:01:25,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2023-02-18 18:01:25,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985218616] [2023-02-18 18:01:25,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:01:25,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 18:01:25,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:25,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 18:01:25,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-02-18 18:01:25,798 INFO L87 Difference]: Start difference. First operand 176 states and 207 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 18:01:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:27,602 INFO L93 Difference]: Finished difference Result 252 states and 316 transitions. [2023-02-18 18:01:27,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 18:01:27,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2023-02-18 18:01:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:27,604 INFO L225 Difference]: With dead ends: 252 [2023-02-18 18:01:27,604 INFO L226 Difference]: Without dead ends: 246 [2023-02-18 18:01:27,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-02-18 18:01:27,605 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 91 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:27,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 221 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 18:01:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-18 18:01:27,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 224. [2023-02-18 18:01:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 150 states have (on average 1.2) internal successors, (180), 157 states have internal predecessors, (180), 48 states have call successors, (48), 25 states have call predecessors, (48), 25 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-18 18:01:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 272 transitions. [2023-02-18 18:01:27,640 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 272 transitions. Word has length 46 [2023-02-18 18:01:27,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:27,641 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 272 transitions. [2023-02-18 18:01:27,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 18:01:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 272 transitions. [2023-02-18 18:01:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 18:01:27,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:27,649 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:27,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-18 18:01:27,856 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 [2023-02-18 18:01:27,857 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:27,857 INFO L85 PathProgramCache]: Analyzing trace with hash 98519191, now seen corresponding path program 1 times [2023-02-18 18:01:27,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:27,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106062869] [2023-02-18 18:01:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:27,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:27,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:01:27,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915035816] [2023-02-18 18:01:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:27,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:27,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:27,878 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) [2023-02-18 18:01:27,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 18:01:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:27,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-18 18:01:27,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-18 18:01:28,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:01:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-18 18:01:29,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:29,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106062869] [2023-02-18 18:01:29,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:01:29,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915035816] [2023-02-18 18:01:29,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915035816] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:01:29,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:01:29,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-02-18 18:01:29,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273909163] [2023-02-18 18:01:29,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:01:29,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 18:01:29,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 18:01:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-02-18 18:01:29,586 INFO L87 Difference]: Start difference. First operand 224 states and 272 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-18 18:01:37,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:01:40,590 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 [] [2023-02-18 18:01:40,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:40,607 INFO L93 Difference]: Finished difference Result 352 states and 445 transitions. [2023-02-18 18:01:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 18:01:40,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2023-02-18 18:01:40,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:40,609 INFO L225 Difference]: With dead ends: 352 [2023-02-18 18:01:40,609 INFO L226 Difference]: Without dead ends: 285 [2023-02-18 18:01:40,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 18:01:40,610 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 186 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 190 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:40,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 236 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 467 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2023-02-18 18:01:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-02-18 18:01:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 247. [2023-02-18 18:01:40,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 168 states have (on average 1.2083333333333333) internal successors, (203), 174 states have internal predecessors, (203), 51 states have call successors, (51), 28 states have call predecessors, (51), 27 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2023-02-18 18:01:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 301 transitions. [2023-02-18 18:01:40,686 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 301 transitions. Word has length 60 [2023-02-18 18:01:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:40,686 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 301 transitions. [2023-02-18 18:01:40,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-18 18:01:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 301 transitions. [2023-02-18 18:01:40,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 18:01:40,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:40,696 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, 1, 1] [2023-02-18 18:01:40,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 18:01:40,905 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 [2023-02-18 18:01:40,905 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:40,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:40,906 INFO L85 PathProgramCache]: Analyzing trace with hash -902942769, now seen corresponding path program 1 times [2023-02-18 18:01:40,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:40,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107530305] [2023-02-18 18:01:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:40,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:40,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:01:40,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263646881] [2023-02-18 18:01:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:40,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:40,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:40,912 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) [2023-02-18 18:01:40,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 18:01:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:01:40,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 18:01:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 18:01:41,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:01:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 18:01:41,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:41,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107530305] [2023-02-18 18:01:41,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:01:41,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263646881] [2023-02-18 18:01:41,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263646881] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:01:41,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:01:41,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-02-18 18:01:41,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971443337] [2023-02-18 18:01:41,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:01:41,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 18:01:41,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 18:01:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-02-18 18:01:41,322 INFO L87 Difference]: Start difference. First operand 247 states and 301 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 18:01:45,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:01:46,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:01:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:48,100 INFO L93 Difference]: Finished difference Result 352 states and 440 transitions. [2023-02-18 18:01:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 18:01:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 71 [2023-02-18 18:01:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:48,111 INFO L225 Difference]: With dead ends: 352 [2023-02-18 18:01:48,111 INFO L226 Difference]: Without dead ends: 279 [2023-02-18 18:01:48,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2023-02-18 18:01:48,114 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 103 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 142 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:48,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 277 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 405 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2023-02-18 18:01:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-02-18 18:01:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 254. [2023-02-18 18:01:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 172 states have (on average 1.1627906976744187) internal successors, (200), 177 states have internal predecessors, (200), 53 states have call successors, (53), 28 states have call predecessors, (53), 28 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2023-02-18 18:01:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 303 transitions. [2023-02-18 18:01:48,239 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 303 transitions. Word has length 71 [2023-02-18 18:01:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:48,240 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 303 transitions. [2023-02-18 18:01:48,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 18:01:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 303 transitions. [2023-02-18 18:01:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-18 18:01:48,241 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:48,241 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:01:48,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 18:01:48,442 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 [2023-02-18 18:01:48,442 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:48,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1932765757, now seen corresponding path program 2 times [2023-02-18 18:01:48,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:48,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671273394] [2023-02-18 18:01:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:48,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:48,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:01:48,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126160102] [2023-02-18 18:01:48,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:01:48,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:48,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:48,462 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) [2023-02-18 18:01:48,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 18:01:48,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:01:48,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:01:48,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 18:01:48,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 18:01:48,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:01:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 18:01:48,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:48,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671273394] [2023-02-18 18:01:48,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:01:48,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126160102] [2023-02-18 18:01:48,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126160102] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:01:48,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:01:48,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2023-02-18 18:01:48,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132913400] [2023-02-18 18:01:48,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:01:48,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:01:48,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:48,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:01:48,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:01:48,560 INFO L87 Difference]: Start difference. First operand 254 states and 303 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-02-18 18:01:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:01:48,671 INFO L93 Difference]: Finished difference Result 288 states and 346 transitions. [2023-02-18 18:01:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 18:01:48,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 74 [2023-02-18 18:01:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:01:48,673 INFO L225 Difference]: With dead ends: 288 [2023-02-18 18:01:48,673 INFO L226 Difference]: Without dead ends: 218 [2023-02-18 18:01:48,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:01:48,674 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:01:48,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:01:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-18 18:01:48,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2023-02-18 18:01:48,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 148 states have (on average 1.1486486486486487) internal successors, (170), 152 states have internal predecessors, (170), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-02-18 18:01:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 256 transitions. [2023-02-18 18:01:48,713 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 256 transitions. Word has length 74 [2023-02-18 18:01:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:01:48,714 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 256 transitions. [2023-02-18 18:01:48,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-02-18 18:01:48,715 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 256 transitions. [2023-02-18 18:01:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-18 18:01:48,718 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:01:48,718 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, 1, 1] [2023-02-18 18:01:48,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 18:01:48,923 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 [2023-02-18 18:01:48,924 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:01:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:01:48,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1315137972, now seen corresponding path program 3 times [2023-02-18 18:01:48,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:01:48,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752941789] [2023-02-18 18:01:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:01:48,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:01:48,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:01:48,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584353902] [2023-02-18 18:01:48,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 18:01:48,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:01:48,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:01:48,932 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) [2023-02-18 18:01:48,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 18:01:49,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 18:01:49,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:01:49,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-18 18:01:49,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:01:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-02-18 18:01:49,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:01:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 24 refuted. 6 times theorem prover too weak. 312 trivial. 0 not checked. [2023-02-18 18:01:55,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:01:55,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752941789] [2023-02-18 18:01:55,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:01:55,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584353902] [2023-02-18 18:01:55,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584353902] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:01:55,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:01:55,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-02-18 18:01:55,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277494526] [2023-02-18 18:01:55,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:01:55,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 18:01:55,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:01:55,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 18:01:55,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=310, Unknown=2, NotChecked=0, Total=380 [2023-02-18 18:01:55,833 INFO L87 Difference]: Start difference. First operand 218 states and 256 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 18 states have internal predecessors, (53), 10 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-18 18:02:01,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:02:09,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:02:12,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:02:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:02:15,210 INFO L93 Difference]: Finished difference Result 305 states and 391 transitions. [2023-02-18 18:02:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 18:02:15,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 18 states have internal predecessors, (53), 10 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 92 [2023-02-18 18:02:15,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:02:15,212 INFO L225 Difference]: With dead ends: 305 [2023-02-18 18:02:15,212 INFO L226 Difference]: Without dead ends: 274 [2023-02-18 18:02:15,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=205, Invalid=848, Unknown=3, NotChecked=0, Total=1056 [2023-02-18 18:02:15,213 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 181 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 220 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2023-02-18 18:02:15,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 333 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 858 Invalid, 2 Unknown, 0 Unchecked, 15.7s Time] [2023-02-18 18:02:15,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-02-18 18:02:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 246. [2023-02-18 18:02:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 165 states have (on average 1.1818181818181819) internal successors, (195), 171 states have internal predecessors, (195), 54 states have call successors, (54), 26 states have call predecessors, (54), 26 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2023-02-18 18:02:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 301 transitions. [2023-02-18 18:02:15,318 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 301 transitions. Word has length 92 [2023-02-18 18:02:15,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:02:15,319 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 301 transitions. [2023-02-18 18:02:15,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 18 states have internal predecessors, (53), 10 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-18 18:02:15,319 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 301 transitions. [2023-02-18 18:02:15,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-02-18 18:02:15,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:02:15,320 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, 1, 1] [2023-02-18 18:02:15,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 18:02:15,525 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 [2023-02-18 18:02:15,525 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:02:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:02:15,526 INFO L85 PathProgramCache]: Analyzing trace with hash 57999976, now seen corresponding path program 1 times [2023-02-18 18:02:15,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:02:15,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583945342] [2023-02-18 18:02:15,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:02:15,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:02:15,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:02:15,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189327501] [2023-02-18 18:02:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:02:15,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:02:15,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:02:15,551 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) [2023-02-18 18:02:15,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 18:02:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:02:15,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 18:02:15,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:02:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 18:02:15,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:02:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-02-18 18:02:15,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:02:15,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583945342] [2023-02-18 18:02:15,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:02:15,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189327501] [2023-02-18 18:02:15,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189327501] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:02:15,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:02:15,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 18:02:15,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635192143] [2023-02-18 18:02:15,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:02:15,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 18:02:15,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:02:15,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 18:02:15,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 18:02:15,669 INFO L87 Difference]: Start difference. First operand 246 states and 301 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 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) [2023-02-18 18:02:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:02:16,210 INFO L93 Difference]: Finished difference Result 640 states and 823 transitions. [2023-02-18 18:02:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 18:02:16,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 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 98 [2023-02-18 18:02:16,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:02:16,213 INFO L225 Difference]: With dead ends: 640 [2023-02-18 18:02:16,213 INFO L226 Difference]: Without dead ends: 542 [2023-02-18 18:02:16,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-18 18:02:16,214 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 150 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 18:02:16,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 309 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 18:02:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-02-18 18:02:16,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 520. [2023-02-18 18:02:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 338 states have (on average 1.2248520710059172) internal successors, (414), 360 states have internal predecessors, (414), 125 states have call successors, (125), 57 states have call predecessors, (125), 56 states have return successors, (116), 102 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-18 18:02:16,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 655 transitions. [2023-02-18 18:02:16,445 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 655 transitions. Word has length 98 [2023-02-18 18:02:16,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:02:16,445 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 655 transitions. [2023-02-18 18:02:16,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 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) [2023-02-18 18:02:16,446 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 655 transitions. [2023-02-18 18:02:16,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-18 18:02:16,447 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:02:16,447 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, 1, 1] [2023-02-18 18:02:16,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 18:02:16,652 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 [2023-02-18 18:02:16,652 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:02:16,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:02:16,652 INFO L85 PathProgramCache]: Analyzing trace with hash 900247290, now seen corresponding path program 2 times [2023-02-18 18:02:16,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:02:16,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114768855] [2023-02-18 18:02:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:02:16,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:02:16,657 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:02:16,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838587323] [2023-02-18 18:02:16,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:02:16,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:02:16,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:02:16,659 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) [2023-02-18 18:02:16,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 18:02:16,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:02:16,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:02:16,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 18:02:16,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:02:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-18 18:02:22,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:02:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-18 18:02:28,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:02:28,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114768855] [2023-02-18 18:02:28,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:02:28,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838587323] [2023-02-18 18:02:28,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838587323] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:02:28,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:02:28,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-02-18 18:02:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681875084] [2023-02-18 18:02:28,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:02:28,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 18:02:28,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:02:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 18:02:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-02-18 18:02:28,819 INFO L87 Difference]: Start difference. First operand 520 states and 655 transitions. Second operand has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 14 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-18 18:02:43,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:02:51,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:02:56,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:03:03,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:03:03,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:03:03,284 INFO L93 Difference]: Finished difference Result 691 states and 897 transitions. [2023-02-18 18:03:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 18:03:03,286 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 14 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 103 [2023-02-18 18:03:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:03:03,288 INFO L225 Difference]: With dead ends: 691 [2023-02-18 18:03:03,289 INFO L226 Difference]: Without dead ends: 546 [2023-02-18 18:03:03,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=481, Invalid=1589, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 18:03:03,290 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 210 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 304 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2023-02-18 18:03:03,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 466 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 807 Invalid, 3 Unknown, 0 Unchecked, 21.9s Time] [2023-02-18 18:03:03,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-02-18 18:03:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 489. [2023-02-18 18:03:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 318 states have (on average 1.220125786163522) internal successors, (388), 336 states have internal predecessors, (388), 117 states have call successors, (117), 53 states have call predecessors, (117), 53 states have return successors, (110), 99 states have call predecessors, (110), 110 states have call successors, (110) [2023-02-18 18:03:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 615 transitions. [2023-02-18 18:03:03,555 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 615 transitions. Word has length 103 [2023-02-18 18:03:03,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:03:03,556 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 615 transitions. [2023-02-18 18:03:03,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 14 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-18 18:03:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 615 transitions. [2023-02-18 18:03:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-18 18:03:03,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:03:03,557 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:03:03,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 18:03:03,765 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 [2023-02-18 18:03:03,766 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:03:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:03:03,766 INFO L85 PathProgramCache]: Analyzing trace with hash -353318641, now seen corresponding path program 1 times [2023-02-18 18:03:03,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:03:03,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447010666] [2023-02-18 18:03:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:03:03,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:03:03,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:03:03,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981195372] [2023-02-18 18:03:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:03:03,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:03:03,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:03:03,798 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) [2023-02-18 18:03:03,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 18:03:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:03:03,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 18:03:03,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:03:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 18:03:03,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:03:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-02-18 18:03:04,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:03:04,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447010666] [2023-02-18 18:03:04,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:03:04,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981195372] [2023-02-18 18:03:04,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981195372] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:03:04,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:03:04,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-18 18:03:04,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041252703] [2023-02-18 18:03:04,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:03:04,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 18:03:04,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:03:04,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 18:03:04,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-18 18:03:04,058 INFO L87 Difference]: Start difference. First operand 489 states and 615 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 13 states have call successors, (33), 8 states have call predecessors, (33), 7 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2023-02-18 18:03:05,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:03:05,402 INFO L93 Difference]: Finished difference Result 880 states and 1140 transitions. [2023-02-18 18:03:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 18:03:05,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 13 states have call successors, (33), 8 states have call predecessors, (33), 7 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) Word has length 110 [2023-02-18 18:03:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:03:05,406 INFO L225 Difference]: With dead ends: 880 [2023-02-18 18:03:05,410 INFO L226 Difference]: Without dead ends: 834 [2023-02-18 18:03:05,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2023-02-18 18:03:05,412 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 206 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 18:03:05,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 441 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 18:03:05,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-02-18 18:03:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 821. [2023-02-18 18:03:06,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 555 states have (on average 1.1765765765765765) internal successors, (653), 567 states have internal predecessors, (653), 188 states have call successors, (188), 77 states have call predecessors, (188), 77 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2023-02-18 18:03:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1021 transitions. [2023-02-18 18:03:06,033 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1021 transitions. Word has length 110 [2023-02-18 18:03:06,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:03:06,033 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1021 transitions. [2023-02-18 18:03:06,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 13 states have call successors, (33), 8 states have call predecessors, (33), 7 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2023-02-18 18:03:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1021 transitions. [2023-02-18 18:03:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-18 18:03:06,055 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:03:06,055 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, 1, 1] [2023-02-18 18:03:06,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 18:03:06,262 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 [2023-02-18 18:03:06,264 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:03:06,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:03:06,265 INFO L85 PathProgramCache]: Analyzing trace with hash 488955713, now seen corresponding path program 4 times [2023-02-18 18:03:06,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:03:06,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166034729] [2023-02-18 18:03:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:03:06,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:03:06,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:03:06,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955629432] [2023-02-18 18:03:06,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 18:03:06,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:03:06,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:03:06,282 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) [2023-02-18 18:03:06,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 18:03:06,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 18:03:06,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:03:06,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-18 18:03:06,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:03:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 106 proven. 89 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-02-18 18:03:07,536 INFO L328 TraceCheckSpWp]: Computing backward predicates...