./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/egcd3-ll_valuebound100.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 c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 04:43:35,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:43:35,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:43:35,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:43:35,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:43:35,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:43:35,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:43:35,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:43:35,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:43:35,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:43:35,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:43:35,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:43:35,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:43:35,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:43:35,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:43:35,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:43:35,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:43:35,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:43:35,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:43:35,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:43:35,242 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:43:35,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:43:35,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:43:35,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:43:35,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:43:35,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:43:35,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:43:35,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:43:35,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:43:35,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:43:35,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:43:35,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:43:35,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:43:35,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:43:35,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:43:35,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:43:35,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:43:35,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:43:35,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:43:35,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:43:35,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:43:35,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:43:35,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:43:35,288 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:43:35,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:43:35,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:43:35,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:43:35,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:43:35,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:43:35,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:43:35,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:43:35,291 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:43:35,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:43:35,292 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:43:35,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:43:35,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:43:35,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:43:35,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:43:35,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:43:35,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:43:35,293 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:43:35,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:43:35,294 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:43:35,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:43:35,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:43:35,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:43:35,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:43:35,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:43:35,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:43:35,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:43:35,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:43:35,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:43:35,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:43:35,296 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:43:35,297 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:43:35,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:43:35,297 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e [2022-07-12 04:43:35,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:43:35,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:43:35,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:43:35,499 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:43:35,500 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:43:35,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-07-12 04:43:35,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edef59cd0/402c93b632564e428342e440cf3e88cd/FLAG0b661c1f0 [2022-07-12 04:43:35,900 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:43:35,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-07-12 04:43:35,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edef59cd0/402c93b632564e428342e440cf3e88cd/FLAG0b661c1f0 [2022-07-12 04:43:36,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edef59cd0/402c93b632564e428342e440cf3e88cd [2022-07-12 04:43:36,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:43:36,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:43:36,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:43:36,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:43:36,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:43:36,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:43:36" (1/1) ... [2022-07-12 04:43:36,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11807e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36, skipping insertion in model container [2022-07-12 04:43:36,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:43:36" (1/1) ... [2022-07-12 04:43:36,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:43:36,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:43:36,461 WARN L230 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/egcd3-ll_valuebound100.c[490,503] [2022-07-12 04:43:36,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:43:36,478 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:43:36,485 WARN L230 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/egcd3-ll_valuebound100.c[490,503] [2022-07-12 04:43:36,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:43:36,498 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:43:36,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36 WrapperNode [2022-07-12 04:43:36,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:43:36,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:43:36,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:43:36,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:43:36,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36" (1/1) ... [2022-07-12 04:43:36,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36" (1/1) ... [2022-07-12 04:43:36,518 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-07-12 04:43:36,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:43:36,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:43:36,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:43:36,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:43:36,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36" (1/1) ... [2022-07-12 04:43:36,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36" (1/1) ... [2022-07-12 04:43:36,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36" (1/1) ... [2022-07-12 04:43:36,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36" (1/1) ... [2022-07-12 04:43:36,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36" (1/1) ... [2022-07-12 04:43:36,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36" (1/1) ... [2022-07-12 04:43:36,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36" (1/1) ... [2022-07-12 04:43:36,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:43:36,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:43:36,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:43:36,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:43:36,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36" (1/1) ... [2022-07-12 04:43:36,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:43:36,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:36,567 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) [2022-07-12 04:43:36,584 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 [2022-07-12 04:43:36,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:43:36,606 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 04:43:36,607 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 04:43:36,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:43:36,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:43:36,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:43:36,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 04:43:36,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 04:43:36,664 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:43:36,667 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:43:36,836 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:43:36,846 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:43:36,847 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 04:43:36,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:43:36 BoogieIcfgContainer [2022-07-12 04:43:36,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:43:36,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:43:36,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:43:36,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:43:36,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:43:36" (1/3) ... [2022-07-12 04:43:36,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1043e9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:43:36, skipping insertion in model container [2022-07-12 04:43:36,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:43:36" (2/3) ... [2022-07-12 04:43:36,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1043e9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:43:36, skipping insertion in model container [2022-07-12 04:43:36,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:43:36" (3/3) ... [2022-07-12 04:43:36,855 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2022-07-12 04:43:36,876 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:43:36,876 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:43:36,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:43:36,932 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f81c025, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f8de1c2 [2022-07-12 04:43:36,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:43:36,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-12 04:43:36,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 04:43:36,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:36,956 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:36,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:36,971 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2022-07-12 04:43:36,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:36,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663730482] [2022-07-12 04:43:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:36,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:37,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:43:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:37,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 04:43:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:37,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 04:43:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:37,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 04:43:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:43:37,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:37,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663730482] [2022-07-12 04:43:37,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663730482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:43:37,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:43:37,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 04:43:37,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067237766] [2022-07-12 04:43:37,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:43:37,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 04:43:37,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:37,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 04:43:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:43:37,159 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:43:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:37,179 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2022-07-12 04:43:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 04:43:37,181 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-07-12 04:43:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:37,191 INFO L225 Difference]: With dead ends: 67 [2022-07-12 04:43:37,192 INFO L226 Difference]: Without dead ends: 31 [2022-07-12 04:43:37,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:43:37,200 INFO L413 NwaCegarLoop]: 44 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, 44 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 [2022-07-12 04:43:37,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:43:37,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-12 04:43:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-12 04:43:37,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 04:43:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-07-12 04:43:37,248 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2022-07-12 04:43:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:37,249 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-07-12 04:43:37,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:43:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-07-12 04:43:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 04:43:37,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:37,254 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:37,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:43:37,255 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:37,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:37,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2022-07-12 04:43:37,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:37,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535246648] [2022-07-12 04:43:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:37,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:37,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:37,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80465751] [2022-07-12 04:43:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:37,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:37,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:37,288 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) [2022-07-12 04:43:37,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:43:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:37,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:43:37,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:43:37,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:43:37,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:37,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535246648] [2022-07-12 04:43:37,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:37,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80465751] [2022-07-12 04:43:37,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80465751] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:43:37,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:43:37,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 04:43:37,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166906620] [2022-07-12 04:43:37,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:43:37,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 04:43:37,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:37,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 04:43:37,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:43:37,450 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:43:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:37,551 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-07-12 04:43:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:43:37,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-07-12 04:43:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:37,553 INFO L225 Difference]: With dead ends: 50 [2022-07-12 04:43:37,553 INFO L226 Difference]: Without dead ends: 43 [2022-07-12 04:43:37,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:43:37,554 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:37,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 113 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:43:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-12 04:43:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-07-12 04:43:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 04:43:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-07-12 04:43:37,561 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2022-07-12 04:43:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:37,561 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-07-12 04:43:37,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:43:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-07-12 04:43:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 04:43:37,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:37,562 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:37,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:37,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:37,764 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:37,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:37,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2022-07-12 04:43:37,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:37,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137087720] [2022-07-12 04:43:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:37,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:37,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:37,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780276069] [2022-07-12 04:43:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:37,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:37,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:37,788 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) [2022-07-12 04:43:37,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:43:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:37,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:43:37,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:43:37,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:43:37,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:37,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137087720] [2022-07-12 04:43:37,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:37,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780276069] [2022-07-12 04:43:37,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780276069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:43:37,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:43:37,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:43:37,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425290056] [2022-07-12 04:43:37,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:43:37,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:43:37,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:37,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:43:37,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:43:37,920 INFO L87 Difference]: Start difference. First operand 33 states and 42 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:43:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:37,966 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-07-12 04:43:37,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:43:37,967 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-07-12 04:43:37,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:37,969 INFO L225 Difference]: With dead ends: 49 [2022-07-12 04:43:37,969 INFO L226 Difference]: Without dead ends: 47 [2022-07-12 04:43:37,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:43:37,973 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:37,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 137 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:43:37,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-12 04:43:37,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-12 04:43:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-12 04:43:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-07-12 04:43:37,994 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2022-07-12 04:43:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:37,994 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-07-12 04:43:37,994 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:43:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-07-12 04:43:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 04:43:37,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:37,995 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:38,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:38,211 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 [2022-07-12 04:43:38,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2022-07-12 04:43:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:38,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552974283] [2022-07-12 04:43:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:38,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:38,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:38,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912278944] [2022-07-12 04:43:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:38,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:38,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:38,241 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) [2022-07-12 04:43:38,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:43:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:38,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:43:38,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:43:38,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:43:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:43:38,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:38,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552974283] [2022-07-12 04:43:38,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:38,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912278944] [2022-07-12 04:43:38,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912278944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:43:38,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:43:38,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-12 04:43:38,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761327254] [2022-07-12 04:43:38,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:43:38,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 04:43:38,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:38,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 04:43:38,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:43:38,424 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:43:38,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:38,613 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2022-07-12 04:43:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 04:43:38,613 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-12 04:43:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:38,616 INFO L225 Difference]: With dead ends: 99 [2022-07-12 04:43:38,616 INFO L226 Difference]: Without dead ends: 92 [2022-07-12 04:43:38,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:43:38,618 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:38,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 176 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:43:38,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-12 04:43:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2022-07-12 04:43:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 04:43:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-07-12 04:43:38,628 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2022-07-12 04:43:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:38,628 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-07-12 04:43:38,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:43:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-07-12 04:43:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 04:43:38,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:38,629 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:38,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:38,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:38,844 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:38,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:38,844 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2022-07-12 04:43:38,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:38,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013077821] [2022-07-12 04:43:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:38,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:38,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:38,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003321586] [2022-07-12 04:43:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:38,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:38,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:38,858 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) [2022-07-12 04:43:38,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:43:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:38,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:43:38,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:43:38,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:43:38,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:38,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013077821] [2022-07-12 04:43:38,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:38,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003321586] [2022-07-12 04:43:38,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003321586] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:43:38,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:43:38,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:43:38,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405287763] [2022-07-12 04:43:38,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:43:38,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:43:38,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:38,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:43:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:43:38,955 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 04:43:38,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:38,992 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2022-07-12 04:43:38,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:43:38,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-07-12 04:43:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:38,993 INFO L225 Difference]: With dead ends: 75 [2022-07-12 04:43:38,993 INFO L226 Difference]: Without dead ends: 73 [2022-07-12 04:43:38,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:43:38,994 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:38,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 131 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:43:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-12 04:43:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-07-12 04:43:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 04:43:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-07-12 04:43:39,003 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2022-07-12 04:43:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:39,004 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-07-12 04:43:39,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 04:43:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-07-12 04:43:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 04:43:39,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:39,005 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:39,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:39,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:39,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:39,227 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2022-07-12 04:43:39,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:39,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994874117] [2022-07-12 04:43:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:39,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:39,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:39,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553759686] [2022-07-12 04:43:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:39,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:39,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:39,248 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) [2022-07-12 04:43:39,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:43:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:39,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 04:43:39,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:43:39,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:43:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:43:39,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994874117] [2022-07-12 04:43:39,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553759686] [2022-07-12 04:43:39,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553759686] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:43:39,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:43:39,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-07-12 04:43:39,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222960053] [2022-07-12 04:43:39,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:43:39,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:43:39,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:43:39,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:43:39,526 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:43:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:39,597 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2022-07-12 04:43:39,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:43:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2022-07-12 04:43:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:39,599 INFO L225 Difference]: With dead ends: 95 [2022-07-12 04:43:39,599 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 04:43:39,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:43:39,600 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:39,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 229 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-07-12 04:43:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 04:43:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2022-07-12 04:43:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 63 states have internal predecessors, (77), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-12 04:43:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2022-07-12 04:43:39,609 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 38 [2022-07-12 04:43:39,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:39,609 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2022-07-12 04:43:39,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:43:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2022-07-12 04:43:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 04:43:39,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:39,610 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:39,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:39,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:39,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:39,819 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2022-07-12 04:43:39,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:39,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287830163] [2022-07-12 04:43:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:39,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:39,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:39,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186095940] [2022-07-12 04:43:39,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:39,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:39,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:39,833 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) [2022-07-12 04:43:39,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:43:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:39,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:43:39,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 04:43:39,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:43:39,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:39,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287830163] [2022-07-12 04:43:39,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:39,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186095940] [2022-07-12 04:43:39,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186095940] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:43:39,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:43:39,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:43:39,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673291005] [2022-07-12 04:43:39,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:43:39,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:43:39,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:39,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:43:39,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:43:39,905 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 04:43:39,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:39,956 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2022-07-12 04:43:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:43:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-07-12 04:43:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:39,959 INFO L225 Difference]: With dead ends: 126 [2022-07-12 04:43:39,959 INFO L226 Difference]: Without dead ends: 124 [2022-07-12 04:43:39,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:43:39,961 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:39,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:43:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-12 04:43:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2022-07-12 04:43:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 76 states have internal predecessors, (95), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-12 04:43:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 168 transitions. [2022-07-12 04:43:39,983 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 168 transitions. Word has length 43 [2022-07-12 04:43:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:39,984 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 168 transitions. [2022-07-12 04:43:39,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 04:43:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 168 transitions. [2022-07-12 04:43:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 04:43:39,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:39,985 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:40,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:40,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:40,199 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:40,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:40,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2022-07-12 04:43:40,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:40,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818938846] [2022-07-12 04:43:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:40,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:40,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:40,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294414823] [2022-07-12 04:43:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:40,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:40,212 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) [2022-07-12 04:43:40,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:43:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:40,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 04:43:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:43:40,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:43:40,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:40,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818938846] [2022-07-12 04:43:40,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:40,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294414823] [2022-07-12 04:43:40,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294414823] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:43:40,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:43:40,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-12 04:43:40,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447203506] [2022-07-12 04:43:40,383 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:43:40,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 04:43:40,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 04:43:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:43:40,384 INFO L87 Difference]: Start difference. First operand 119 states and 168 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 04:43:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:40,513 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2022-07-12 04:43:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:43:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-07-12 04:43:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:40,516 INFO L225 Difference]: With dead ends: 133 [2022-07-12 04:43:40,516 INFO L226 Difference]: Without dead ends: 131 [2022-07-12 04:43:40,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:43:40,517 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:40,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 204 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:43:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-12 04:43:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2022-07-12 04:43:40,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-12 04:43:40,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2022-07-12 04:43:40,531 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 43 [2022-07-12 04:43:40,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:40,531 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2022-07-12 04:43:40,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 04:43:40,532 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2022-07-12 04:43:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 04:43:40,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:40,534 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:40,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:40,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:40,750 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:40,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2022-07-12 04:43:40,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:40,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541131765] [2022-07-12 04:43:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:40,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:40,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:40,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512029359] [2022-07-12 04:43:40,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:43:40,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:40,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:40,760 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) [2022-07-12 04:43:40,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:43:40,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:43:40,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:43:40,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 04:43:40,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 04:43:40,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:43:40,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:40,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541131765] [2022-07-12 04:43:40,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:40,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512029359] [2022-07-12 04:43:40,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512029359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:43:40,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:43:40,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:43:40,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175102195] [2022-07-12 04:43:40,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:43:40,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:43:40,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:40,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:43:40,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:43:40,821 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:43:40,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:40,882 INFO L93 Difference]: Finished difference Result 166 states and 226 transitions. [2022-07-12 04:43:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:43:40,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-07-12 04:43:40,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:40,883 INFO L225 Difference]: With dead ends: 166 [2022-07-12 04:43:40,883 INFO L226 Difference]: Without dead ends: 110 [2022-07-12 04:43:40,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:43:40,884 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:40,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 139 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:43:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-12 04:43:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2022-07-12 04:43:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.1875) internal successors, (76), 65 states have internal predecessors, (76), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-12 04:43:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2022-07-12 04:43:40,892 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 43 [2022-07-12 04:43:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:40,892 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2022-07-12 04:43:40,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 04:43:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2022-07-12 04:43:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 04:43:40,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:40,893 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:40,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:41,107 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,SelfDestructingSolverStorable8 [2022-07-12 04:43:41,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:41,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2022-07-12 04:43:41,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:41,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666304063] [2022-07-12 04:43:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:41,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:41,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:41,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780205465] [2022-07-12 04:43:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:41,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:41,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:41,116 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) [2022-07-12 04:43:41,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 04:43:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:41,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:43:41,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 04:43:41,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:43:41,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:41,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666304063] [2022-07-12 04:43:41,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:41,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780205465] [2022-07-12 04:43:41,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780205465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:43:41,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:43:41,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:43:41,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888454494] [2022-07-12 04:43:41,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:43:41,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:43:41,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:41,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:43:41,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:43:41,178 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 04:43:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:41,223 INFO L93 Difference]: Finished difference Result 154 states and 217 transitions. [2022-07-12 04:43:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:43:41,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2022-07-12 04:43:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:41,226 INFO L225 Difference]: With dead ends: 154 [2022-07-12 04:43:41,226 INFO L226 Difference]: Without dead ends: 152 [2022-07-12 04:43:41,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:43:41,227 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:41,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:43:41,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-12 04:43:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2022-07-12 04:43:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 80 states have internal predecessors, (85), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-12 04:43:41,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2022-07-12 04:43:41,244 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 48 [2022-07-12 04:43:41,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:41,244 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2022-07-12 04:43:41,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 04:43:41,245 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2022-07-12 04:43:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 04:43:41,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:41,247 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:41,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:41,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 04:43:41,455 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:41,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:41,456 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2022-07-12 04:43:41,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:41,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258353288] [2022-07-12 04:43:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:41,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:41,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:41,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65664751] [2022-07-12 04:43:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:41,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:41,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:41,465 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) [2022-07-12 04:43:41,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 04:43:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:41,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 04:43:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 04:43:41,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:43:46,330 WARN L855 $PredicateComparison]: unable to prove that (or (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~v~0#1|)) 0)) (let ((.cse11 (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (let ((.cse8 (= |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse4 (+ (* (- 1) .cse11 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (* |c_ULTIMATE.start_main_~s~0#1| .cse11) (- 1))))) (.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1| (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)))) (and (or (not (= .cse0 0)) (let ((.cse3 (= 0 |c_ULTIMATE.start_main_~q~0#1|)) (.cse1 (+ |c_ULTIMATE.start_main_~b~0#1| (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)))) (and (or (not (= .cse1 0)) (forall ((|ULTIMATE.start_main_~x~0#1| Int)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (+ (* (+ (* (- 1) .cse2 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~x~0#1|) |c_ULTIMATE.start_main_~b~0#1| (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (* |c_ULTIMATE.start_main_~s~0#1| .cse2) (- 1)))))))) (not .cse3)) (or .cse3 (not (= (mod .cse1 |c_ULTIMATE.start_main_~q~0#1|) 0)) (let ((.cse5 (div .cse1 |c_ULTIMATE.start_main_~q~0#1|))) (= (+ (* .cse4 .cse5) |c_ULTIMATE.start_main_~b~0#1| .cse6) (+ .cse7 (* .cse5 |c_ULTIMATE.start_main_~q~0#1|))))))) (not .cse8)) (let ((.cse10 (div .cse0 |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse9 (+ .cse7 (* .cse10 |c_ULTIMATE.start_main_~q~0#1|)))) (or (not (= .cse9 |c_ULTIMATE.start_main_~b~0#1|)) .cse8 (not (= (mod .cse0 |c_ULTIMATE.start_main_~p~0#1|) 0)) (= .cse9 (+ (* .cse4 .cse10) |c_ULTIMATE.start_main_~b~0#1| .cse6))))))))) is different from true [2022-07-12 04:43:46,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:46,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258353288] [2022-07-12 04:43:46,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:46,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65664751] [2022-07-12 04:43:46,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65664751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:43:46,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:43:46,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-12 04:43:46,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126567618] [2022-07-12 04:43:46,332 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:43:46,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 04:43:46,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:46,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 04:43:46,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=290, Unknown=1, NotChecked=34, Total=380 [2022-07-12 04:43:46,333 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-12 04:43:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:46,701 INFO L93 Difference]: Finished difference Result 196 states and 279 transitions. [2022-07-12 04:43:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 04:43:46,701 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2022-07-12 04:43:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:46,702 INFO L225 Difference]: With dead ends: 196 [2022-07-12 04:43:46,702 INFO L226 Difference]: Without dead ends: 193 [2022-07-12 04:43:46,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=84, Invalid=425, Unknown=1, NotChecked=42, Total=552 [2022-07-12 04:43:46,703 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 46 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:46,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 224 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:43:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-12 04:43:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 178. [2022-07-12 04:43:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 97 states have (on average 1.175257731958763) internal successors, (114), 105 states have internal predecessors, (114), 69 states have call successors, (69), 11 states have call predecessors, (69), 11 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-12 04:43:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 251 transitions. [2022-07-12 04:43:46,721 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 251 transitions. Word has length 60 [2022-07-12 04:43:46,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:46,722 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 251 transitions. [2022-07-12 04:43:46,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-12 04:43:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 251 transitions. [2022-07-12 04:43:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-12 04:43:46,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:46,723 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:46,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:46,923 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,SelfDestructingSolverStorable10 [2022-07-12 04:43:46,923 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:46,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1649355429, now seen corresponding path program 2 times [2022-07-12 04:43:46,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110604408] [2022-07-12 04:43:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:46,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:46,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:46,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138596040] [2022-07-12 04:43:46,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:43:46,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:46,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:46,933 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) [2022-07-12 04:43:46,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 04:43:46,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:43:46,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:43:46,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 04:43:46,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 04:43:47,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:43:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 04:43:47,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:47,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110604408] [2022-07-12 04:43:47,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:47,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138596040] [2022-07-12 04:43:47,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138596040] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:43:47,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:43:47,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-12 04:43:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112047680] [2022-07-12 04:43:47,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:43:47,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:43:47,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:43:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:43:47,057 INFO L87 Difference]: Start difference. First operand 178 states and 251 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 04:43:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:47,368 INFO L93 Difference]: Finished difference Result 273 states and 400 transitions. [2022-07-12 04:43:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 04:43:47,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2022-07-12 04:43:47,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:47,371 INFO L225 Difference]: With dead ends: 273 [2022-07-12 04:43:47,371 INFO L226 Difference]: Without dead ends: 266 [2022-07-12 04:43:47,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:43:47,372 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 48 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:47,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 288 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:43:47,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-12 04:43:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 193. [2022-07-12 04:43:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 117 states have internal predecessors, (135), 69 states have call successors, (69), 11 states have call predecessors, (69), 11 states have return successors, (68), 64 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-12 04:43:47,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 272 transitions. [2022-07-12 04:43:47,396 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 272 transitions. Word has length 65 [2022-07-12 04:43:47,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:47,396 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 272 transitions. [2022-07-12 04:43:47,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 04:43:47,397 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 272 transitions. [2022-07-12 04:43:47,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 04:43:47,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:47,397 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:47,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:47,608 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,SelfDestructingSolverStorable11 [2022-07-12 04:43:47,609 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:47,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:47,609 INFO L85 PathProgramCache]: Analyzing trace with hash -492391883, now seen corresponding path program 1 times [2022-07-12 04:43:47,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:47,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710667678] [2022-07-12 04:43:47,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:47,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:47,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:47,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017150452] [2022-07-12 04:43:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:47,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:47,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:47,621 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) [2022-07-12 04:43:47,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 04:43:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:47,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 04:43:47,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-12 04:43:47,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:43:47,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:47,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710667678] [2022-07-12 04:43:47,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:47,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017150452] [2022-07-12 04:43:47,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017150452] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:43:47,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:43:47,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:43:47,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831118327] [2022-07-12 04:43:47,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:43:47,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:43:47,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:47,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:43:47,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:43:47,685 INFO L87 Difference]: Start difference. First operand 193 states and 272 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 04:43:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:47,738 INFO L93 Difference]: Finished difference Result 324 states and 455 transitions. [2022-07-12 04:43:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:43:47,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 68 [2022-07-12 04:43:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:47,740 INFO L225 Difference]: With dead ends: 324 [2022-07-12 04:43:47,740 INFO L226 Difference]: Without dead ends: 210 [2022-07-12 04:43:47,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:43:47,742 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:47,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:43:47,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-12 04:43:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 194. [2022-07-12 04:43:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 114 states have internal predecessors, (136), 69 states have call successors, (69), 11 states have call predecessors, (69), 11 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-12 04:43:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 273 transitions. [2022-07-12 04:43:47,762 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 273 transitions. Word has length 68 [2022-07-12 04:43:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:47,763 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 273 transitions. [2022-07-12 04:43:47,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 04:43:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 273 transitions. [2022-07-12 04:43:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-12 04:43:47,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:47,764 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:47,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:47,983 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,SelfDestructingSolverStorable12 [2022-07-12 04:43:47,983 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2022-07-12 04:43:47,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:47,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104373130] [2022-07-12 04:43:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:47,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:47,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:47,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364800868] [2022-07-12 04:43:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:47,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:47,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:48,001 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) [2022-07-12 04:43:48,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 04:43:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:48,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 04:43:48,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-07-12 04:43:48,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:43:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-12 04:43:48,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:48,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104373130] [2022-07-12 04:43:48,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:48,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364800868] [2022-07-12 04:43:48,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364800868] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 04:43:48,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:43:48,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-07-12 04:43:48,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400774582] [2022-07-12 04:43:48,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:43:48,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:43:48,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:48,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:43:48,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:43:48,231 INFO L87 Difference]: Start difference. First operand 194 states and 273 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 04:43:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:48,276 INFO L93 Difference]: Finished difference Result 200 states and 278 transitions. [2022-07-12 04:43:48,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:43:48,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2022-07-12 04:43:48,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:48,278 INFO L225 Difference]: With dead ends: 200 [2022-07-12 04:43:48,278 INFO L226 Difference]: Without dead ends: 198 [2022-07-12 04:43:48,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:43:48,279 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:48,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:43:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-12 04:43:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-07-12 04:43:48,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 117 states have internal predecessors, (139), 69 states have call successors, (69), 12 states have call predecessors, (69), 12 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-12 04:43:48,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 276 transitions. [2022-07-12 04:43:48,297 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 276 transitions. Word has length 70 [2022-07-12 04:43:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:48,297 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 276 transitions. [2022-07-12 04:43:48,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 04:43:48,297 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 276 transitions. [2022-07-12 04:43:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 04:43:48,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:48,298 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:48,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:48,515 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,SelfDestructingSolverStorable13 [2022-07-12 04:43:48,515 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:48,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:48,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2022-07-12 04:43:48,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:48,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441341660] [2022-07-12 04:43:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:48,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:48,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:48,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462340092] [2022-07-12 04:43:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:48,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:48,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:48,540 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) [2022-07-12 04:43:48,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 04:43:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:48,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 04:43:48,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 04:43:48,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:43:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 04:43:48,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:48,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441341660] [2022-07-12 04:43:48,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:48,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462340092] [2022-07-12 04:43:48,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462340092] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:43:48,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:43:48,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-07-12 04:43:48,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148499772] [2022-07-12 04:43:48,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:43:48,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 04:43:48,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:48,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 04:43:48,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-07-12 04:43:48,991 INFO L87 Difference]: Start difference. First operand 198 states and 276 transitions. Second operand has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-12 04:43:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:49,547 INFO L93 Difference]: Finished difference Result 268 states and 365 transitions. [2022-07-12 04:43:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 04:43:49,548 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2022-07-12 04:43:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:49,549 INFO L225 Difference]: With dead ends: 268 [2022-07-12 04:43:49,550 INFO L226 Difference]: Without dead ends: 266 [2022-07-12 04:43:49,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:43:49,552 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 100 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:49,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 186 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:43:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-12 04:43:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 210. [2022-07-12 04:43:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 125 states have (on average 1.184) internal successors, (148), 126 states have internal predecessors, (148), 69 states have call successors, (69), 15 states have call predecessors, (69), 15 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-12 04:43:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 285 transitions. [2022-07-12 04:43:49,571 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 285 transitions. Word has length 68 [2022-07-12 04:43:49,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:49,571 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 285 transitions. [2022-07-12 04:43:49,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-12 04:43:49,571 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 285 transitions. [2022-07-12 04:43:49,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 04:43:49,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:49,572 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:49,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-12 04:43:49,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:49,791 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 2 times [2022-07-12 04:43:49,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:49,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785126227] [2022-07-12 04:43:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:49,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:49,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:49,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787528279] [2022-07-12 04:43:49,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:43:49,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:49,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:49,799 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) [2022-07-12 04:43:49,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 04:43:49,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:43:49,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:43:49,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-12 04:43:49,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-12 04:43:50,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:43:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 04:43:51,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:51,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785126227] [2022-07-12 04:43:51,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:51,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787528279] [2022-07-12 04:43:51,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787528279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:43:51,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:43:51,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-07-12 04:43:51,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535939635] [2022-07-12 04:43:51,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:43:51,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 04:43:51,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 04:43:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-07-12 04:43:51,586 INFO L87 Difference]: Start difference. First operand 210 states and 285 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2022-07-12 04:44:06,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:44:10,478 INFO L93 Difference]: Finished difference Result 297 states and 390 transitions. [2022-07-12 04:44:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 04:44:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 73 [2022-07-12 04:44:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:44:10,480 INFO L225 Difference]: With dead ends: 297 [2022-07-12 04:44:10,480 INFO L226 Difference]: Without dead ends: 295 [2022-07-12 04:44:10,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=390, Invalid=1772, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 04:44:10,481 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 128 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 293 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-07-12 04:44:10,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 309 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1013 Invalid, 1 Unknown, 0 Unchecked, 10.8s Time] [2022-07-12 04:44:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-12 04:44:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 245. [2022-07-12 04:44:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 152 states have (on average 1.1578947368421053) internal successors, (176), 154 states have internal predecessors, (176), 71 states have call successors, (71), 21 states have call predecessors, (71), 21 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2022-07-12 04:44:10,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 317 transitions. [2022-07-12 04:44:10,514 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 317 transitions. Word has length 73 [2022-07-12 04:44:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:44:10,514 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 317 transitions. [2022-07-12 04:44:10,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2022-07-12 04:44:10,515 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 317 transitions. [2022-07-12 04:44:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 04:44:10,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:44:10,515 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:44:10,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 04:44:10,724 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,SelfDestructingSolverStorable15 [2022-07-12 04:44:10,725 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:44:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:44:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash 593432004, now seen corresponding path program 1 times [2022-07-12 04:44:10,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:44:10,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625325720] [2022-07-12 04:44:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:44:10,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:44:10,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:44:10,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508277192] [2022-07-12 04:44:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:44:10,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:44:10,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:44:10,732 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) [2022-07-12 04:44:10,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 04:44:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:44:10,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-12 04:44:10,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:44:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-12 04:44:11,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:44:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-12 04:44:12,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:44:12,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625325720] [2022-07-12 04:44:12,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:44:12,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508277192] [2022-07-12 04:44:12,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508277192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:44:12,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:44:12,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-12 04:44:12,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430464910] [2022-07-12 04:44:12,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:44:12,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 04:44:12,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:44:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 04:44:12,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-07-12 04:44:12,924 INFO L87 Difference]: Start difference. First operand 245 states and 317 transitions. Second operand has 22 states, 20 states have (on average 2.35) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-12 04:44:19,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:44:33,443 INFO L93 Difference]: Finished difference Result 473 states and 661 transitions. [2022-07-12 04:44:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 04:44:33,444 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 82 [2022-07-12 04:44:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:44:33,446 INFO L225 Difference]: With dead ends: 473 [2022-07-12 04:44:33,446 INFO L226 Difference]: Without dead ends: 465 [2022-07-12 04:44:33,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=560, Invalid=2632, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 04:44:33,447 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 128 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:44:33,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 388 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2022-07-12 04:44:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-07-12 04:44:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 390. [2022-07-12 04:44:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 243 states have (on average 1.1851851851851851) internal successors, (288), 246 states have internal predecessors, (288), 121 states have call successors, (121), 25 states have call predecessors, (121), 25 states have return successors, (120), 118 states have call predecessors, (120), 120 states have call successors, (120) [2022-07-12 04:44:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 529 transitions. [2022-07-12 04:44:33,535 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 529 transitions. Word has length 82 [2022-07-12 04:44:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:44:33,535 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 529 transitions. [2022-07-12 04:44:33,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-12 04:44:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 529 transitions. [2022-07-12 04:44:33,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-12 04:44:33,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:44:33,537 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:44:33,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 04:44:33,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 04:44:33,743 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:44:33,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:44:33,744 INFO L85 PathProgramCache]: Analyzing trace with hash 28846429, now seen corresponding path program 2 times [2022-07-12 04:44:33,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:44:33,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319120005] [2022-07-12 04:44:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:44:33,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:44:33,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:44:33,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273884315] [2022-07-12 04:44:33,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:44:33,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:44:33,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:44:33,754 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:44:33,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 04:44:33,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:44:33,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:44:33,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-12 04:44:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:44:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 83 proven. 68 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-12 04:44:34,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:44:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 93 proven. 41 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-12 04:44:37,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:44:37,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319120005] [2022-07-12 04:44:37,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:44:37,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273884315] [2022-07-12 04:44:37,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273884315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:44:37,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:44:37,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2022-07-12 04:44:37,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83267296] [2022-07-12 04:44:37,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:44:37,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 04:44:37,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:44:37,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 04:44:37,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-07-12 04:44:37,681 INFO L87 Difference]: Start difference. First operand 390 states and 529 transitions. Second operand has 29 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 13 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) [2022-07-12 04:44:50,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:53,509 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:58,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:01,063 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:08,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:10,548 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:13,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:25,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:47,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:49,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:50,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:53,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:54,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:56,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:58,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:01,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:03,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:08,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:10,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:27,567 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:30,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:33,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:35,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:37,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:46:37,827 INFO L93 Difference]: Finished difference Result 674 states and 959 transitions. [2022-07-12 04:46:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-12 04:46:37,828 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 13 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) Word has length 109 [2022-07-12 04:46:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:46:37,830 INFO L225 Difference]: With dead ends: 674 [2022-07-12 04:46:37,830 INFO L226 Difference]: Without dead ends: 666 [2022-07-12 04:46:37,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3205 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=1706, Invalid=8596, Unknown=0, NotChecked=0, Total=10302 [2022-07-12 04:46:37,832 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 197 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 609 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 3474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:46:37,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 607 Invalid, 3474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 2849 Invalid, 16 Unknown, 0 Unchecked, 72.2s Time] [2022-07-12 04:46:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-07-12 04:46:38,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 584. [2022-07-12 04:46:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 327 states have (on average 1.2262996941896025) internal successors, (401), 330 states have internal predecessors, (401), 225 states have call successors, (225), 31 states have call predecessors, (225), 31 states have return successors, (224), 222 states have call predecessors, (224), 224 states have call successors, (224) [2022-07-12 04:46:38,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 850 transitions. [2022-07-12 04:46:38,094 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 850 transitions. Word has length 109 [2022-07-12 04:46:38,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:46:38,094 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 850 transitions. [2022-07-12 04:46:38,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 13 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) [2022-07-12 04:46:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 850 transitions. [2022-07-12 04:46:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-12 04:46:38,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:46:38,098 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:46:38,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 04:46:38,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 04:46:38,303 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:46:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:46:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash -876975624, now seen corresponding path program 3 times [2022-07-12 04:46:38,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:46:38,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038604089] [2022-07-12 04:46:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:46:38,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:46:38,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:46:38,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980680388] [2022-07-12 04:46:38,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:46:38,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:46:38,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:46:38,311 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:46:38,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 04:46:38,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 04:46:38,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:46:38,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-12 04:46:38,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:46:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 53 proven. 42 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-07-12 04:46:39,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:46:47,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:46:47,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038604089] [2022-07-12 04:46:47,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:46:47,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980680388] [2022-07-12 04:46:47,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980680388] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:46:47,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:46:47,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-12 04:46:47,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341013741] [2022-07-12 04:46:47,033 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:46:47,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 04:46:47,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:46:47,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 04:46:47,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=590, Unknown=1, NotChecked=0, Total=702 [2022-07-12 04:46:47,034 INFO L87 Difference]: Start difference. First operand 584 states and 850 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-12 04:46:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:46:50,049 INFO L93 Difference]: Finished difference Result 724 states and 1054 transitions. [2022-07-12 04:46:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 04:46:50,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 112 [2022-07-12 04:46:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:46:50,054 INFO L225 Difference]: With dead ends: 724 [2022-07-12 04:46:50,054 INFO L226 Difference]: Without dead ends: 717 [2022-07-12 04:46:50,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=164, Invalid=891, Unknown=1, NotChecked=0, Total=1056 [2022-07-12 04:46:50,055 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 71 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-12 04:46:50,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 386 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-12 04:46:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-07-12 04:46:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 689. [2022-07-12 04:46:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 380 states have (on average 1.2342105263157894) internal successors, (469), 383 states have internal predecessors, (469), 273 states have call successors, (273), 35 states have call predecessors, (273), 35 states have return successors, (272), 270 states have call predecessors, (272), 272 states have call successors, (272) [2022-07-12 04:46:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1014 transitions. [2022-07-12 04:46:50,292 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1014 transitions. Word has length 112 [2022-07-12 04:46:50,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:46:50,292 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 1014 transitions. [2022-07-12 04:46:50,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-12 04:46:50,292 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1014 transitions. [2022-07-12 04:46:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-12 04:46:50,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:46:50,296 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:46:50,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 04:46:50,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:46:50,505 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:46:50,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:46:50,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1746474790, now seen corresponding path program 4 times [2022-07-12 04:46:50,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:46:50,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488433201] [2022-07-12 04:46:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:46:50,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:46:50,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:46:50,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121059107] [2022-07-12 04:46:50,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:46:50,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:46:50,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:46:50,512 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:46:50,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 04:46:50,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:46:50,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:46:50,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-12 04:46:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:46:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 55 proven. 81 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-07-12 04:46:51,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:46:53,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:46:53,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488433201] [2022-07-12 04:46:53,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:46:53,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121059107] [2022-07-12 04:46:53,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121059107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:46:53,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:46:53,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-12 04:46:53,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960294769] [2022-07-12 04:46:53,048 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:46:53,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 04:46:53,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:46:53,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 04:46:53,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:46:53,049 INFO L87 Difference]: Start difference. First operand 689 states and 1014 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-12 04:46:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:46:54,663 INFO L93 Difference]: Finished difference Result 1000 states and 1489 transitions. [2022-07-12 04:46:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 04:46:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 117 [2022-07-12 04:46:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:46:54,668 INFO L225 Difference]: With dead ends: 1000 [2022-07-12 04:46:54,668 INFO L226 Difference]: Without dead ends: 997 [2022-07-12 04:46:54,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 04:46:54,669 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 122 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 04:46:54,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 412 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 04:46:54,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-07-12 04:46:55,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 957. [2022-07-12 04:46:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 507 states have (on average 1.2544378698224852) internal successors, (636), 510 states have internal predecessors, (636), 405 states have call successors, (405), 44 states have call predecessors, (405), 44 states have return successors, (404), 402 states have call predecessors, (404), 404 states have call successors, (404) [2022-07-12 04:46:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1445 transitions. [2022-07-12 04:46:55,058 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1445 transitions. Word has length 117 [2022-07-12 04:46:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:46:55,058 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1445 transitions. [2022-07-12 04:46:55,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-12 04:46:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1445 transitions. [2022-07-12 04:46:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-12 04:46:55,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:46:55,060 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:46:55,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 04:46:55,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:46:55,277 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:46:55,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:46:55,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1576994048, now seen corresponding path program 1 times [2022-07-12 04:46:55,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:46:55,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863331596] [2022-07-12 04:46:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:46:55,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:46:55,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:46:55,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270437079] [2022-07-12 04:46:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:46:55,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:46:55,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:46:55,289 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:46:55,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 04:46:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:46:55,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 04:46:55,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:46:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 95 proven. 50 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-07-12 04:46:55,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:46:55,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:46:55,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863331596] [2022-07-12 04:46:55,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:46:55,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270437079] [2022-07-12 04:46:55,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270437079] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:46:55,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:46:55,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-12 04:46:55,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768797334] [2022-07-12 04:46:55,794 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:46:55,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 04:46:55,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:46:55,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 04:46:55,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:46:55,794 INFO L87 Difference]: Start difference. First operand 957 states and 1445 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-12 04:46:56,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:46:56,608 INFO L93 Difference]: Finished difference Result 1136 states and 1704 transitions. [2022-07-12 04:46:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 04:46:56,608 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 120 [2022-07-12 04:46:56,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:46:56,612 INFO L225 Difference]: With dead ends: 1136 [2022-07-12 04:46:56,612 INFO L226 Difference]: Without dead ends: 1134 [2022-07-12 04:46:56,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-07-12 04:46:56,613 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 45 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:46:56,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 275 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:46:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-07-12 04:46:57,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1093. [2022-07-12 04:46:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 568 states have (on average 1.2605633802816902) internal successors, (716), 571 states have internal predecessors, (716), 473 states have call successors, (473), 51 states have call predecessors, (473), 51 states have return successors, (472), 470 states have call predecessors, (472), 472 states have call successors, (472) [2022-07-12 04:46:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1661 transitions. [2022-07-12 04:46:57,009 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1661 transitions. Word has length 120 [2022-07-12 04:46:57,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:46:57,010 INFO L495 AbstractCegarLoop]: Abstraction has 1093 states and 1661 transitions. [2022-07-12 04:46:57,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-12 04:46:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1661 transitions. [2022-07-12 04:46:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-12 04:46:57,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:46:57,011 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:46:57,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 04:46:57,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-12 04:46:57,228 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:46:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:46:57,229 INFO L85 PathProgramCache]: Analyzing trace with hash -843376510, now seen corresponding path program 2 times [2022-07-12 04:46:57,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:46:57,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980892194] [2022-07-12 04:46:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:46:57,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:46:57,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:46:57,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620137733] [2022-07-12 04:46:57,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:46:57,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:46:57,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:46:57,249 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:46:57,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 04:46:57,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:46:57,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:46:57,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 103 conjunts are in the unsatisfiable core [2022-07-12 04:46:57,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:46:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 125 proven. 82 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-12 04:46:58,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:47:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 146 proven. 19 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-07-12 04:47:03,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:47:03,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980892194] [2022-07-12 04:47:03,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:47:03,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620137733] [2022-07-12 04:47:03,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620137733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:47:03,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:47:03,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 27 [2022-07-12 04:47:03,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947236704] [2022-07-12 04:47:03,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:47:03,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 04:47:03,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:47:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 04:47:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-07-12 04:47:03,586 INFO L87 Difference]: Start difference. First operand 1093 states and 1661 transitions. Second operand has 27 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 12 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-07-12 04:47:07,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:47:10,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:47:12,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:47:15,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:47:18,393 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:47:18,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:47:18,664 INFO L93 Difference]: Finished difference Result 1271 states and 1910 transitions. [2022-07-12 04:47:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 04:47:18,666 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 12 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 120 [2022-07-12 04:47:18,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:47:18,671 INFO L225 Difference]: With dead ends: 1271 [2022-07-12 04:47:18,671 INFO L226 Difference]: Without dead ends: 1269 [2022-07-12 04:47:18,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 217 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=393, Invalid=1863, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 04:47:18,673 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 128 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 366 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-07-12 04:47:18,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 297 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 1070 Invalid, 3 Unknown, 0 Unchecked, 13.8s Time] [2022-07-12 04:47:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-07-12 04:47:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1233. [2022-07-12 04:47:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 639 states have (on average 1.2597809076682316) internal successors, (805), 642 states have internal predecessors, (805), 533 states have call successors, (533), 60 states have call predecessors, (533), 60 states have return successors, (532), 530 states have call predecessors, (532), 532 states have call successors, (532) [2022-07-12 04:47:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1870 transitions. [2022-07-12 04:47:19,161 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1870 transitions. Word has length 120 [2022-07-12 04:47:19,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:47:19,162 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 1870 transitions. [2022-07-12 04:47:19,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 12 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-07-12 04:47:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1870 transitions. [2022-07-12 04:47:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-12 04:47:19,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:47:19,164 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:47:19,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 04:47:19,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-12 04:47:19,381 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:47:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:47:19,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1278110097, now seen corresponding path program 5 times [2022-07-12 04:47:19,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:47:19,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124830669] [2022-07-12 04:47:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:47:19,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:47:19,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:47:19,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948127006] [2022-07-12 04:47:19,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:47:19,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:47:19,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:47:19,395 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:47:19,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 04:47:19,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-12 04:47:19,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:47:19,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-12 04:47:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:47:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 51 proven. 110 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-12 04:47:21,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:47:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 51 proven. 110 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-12 04:47:24,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:47:24,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124830669] [2022-07-12 04:47:24,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:47:24,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948127006] [2022-07-12 04:47:24,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948127006] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:47:24,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:47:24,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2022-07-12 04:47:24,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91071735] [2022-07-12 04:47:24,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:47:24,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 04:47:24,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:47:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 04:47:24,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-07-12 04:47:24,223 INFO L87 Difference]: Start difference. First operand 1233 states and 1870 transitions. Second operand has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 26 states have internal predecessors, (61), 12 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2022-07-12 04:47:40,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []