./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd3-ll.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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 16:18:06,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 16:18:06,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 16:18:06,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 16:18:06,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 16:18:06,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 16:18:06,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 16:18:06,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 16:18:06,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 16:18:06,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 16:18:06,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 16:18:06,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 16:18:06,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 16:18:06,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 16:18:06,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 16:18:06,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 16:18:06,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 16:18:06,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 16:18:06,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 16:18:06,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 16:18:06,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 16:18:06,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 16:18:06,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 16:18:06,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 16:18:06,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 16:18:06,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 16:18:06,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 16:18:06,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 16:18:06,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 16:18:06,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 16:18:06,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 16:18:06,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 16:18:06,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 16:18:06,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 16:18:06,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 16:18:06,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 16:18:06,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 16:18:06,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 16:18:06,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 16:18:06,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 16:18:06,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 16:18:06,280 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 16:18:06,304 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 16:18:06,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 16:18:06,305 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 16:18:06,305 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 16:18:06,305 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 16:18:06,306 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 16:18:06,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 16:18:06,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 16:18:06,306 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 16:18:06,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 16:18:06,307 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 16:18:06,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 16:18:06,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 16:18:06,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 16:18:06,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 16:18:06,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 16:18:06,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 16:18:06,308 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 16:18:06,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 16:18:06,308 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 16:18:06,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 16:18:06,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 16:18:06,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 16:18:06,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 16:18:06,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 16:18:06,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 16:18:06,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 16:18:06,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 16:18:06,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 16:18:06,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 16:18:06,310 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 16:18:06,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 16:18:06,310 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 16:18:06,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 16:18:06,311 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 16:18:06,311 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2023-02-18 16:18:06,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 16:18:06,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 16:18:06,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 16:18:06,508 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 16:18:06,508 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 16:18:06,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2023-02-18 16:18:07,387 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 16:18:07,532 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 16:18:07,533 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2023-02-18 16:18:07,537 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62c18031c/c0084f7d679248ad8223ad835ef317ff/FLAG948040708 [2023-02-18 16:18:07,546 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62c18031c/c0084f7d679248ad8223ad835ef317ff [2023-02-18 16:18:07,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 16:18:07,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 16:18:07,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 16:18:07,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 16:18:07,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 16:18:07,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54ab8bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07, skipping insertion in model container [2023-02-18 16:18:07,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 16:18:07,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 16:18:07,682 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2023-02-18 16:18:07,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 16:18:07,716 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 16:18:07,725 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2023-02-18 16:18:07,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 16:18:07,752 INFO L208 MainTranslator]: Completed translation [2023-02-18 16:18:07,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07 WrapperNode [2023-02-18 16:18:07,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 16:18:07,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 16:18:07,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 16:18:07,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 16:18:07,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,777 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2023-02-18 16:18:07,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 16:18:07,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 16:18:07,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 16:18:07,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 16:18:07,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,804 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 16:18:07,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 16:18:07,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 16:18:07,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 16:18:07,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07" (1/1) ... [2023-02-18 16:18:07,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 16:18:07,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:07,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 16:18:07,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 16:18:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 16:18:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 16:18:07,903 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 16:18:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 16:18:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 16:18:07,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 16:18:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 16:18:07,903 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 16:18:07,951 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 16:18:07,967 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 16:18:08,069 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 16:18:08,072 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 16:18:08,072 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 16:18:08,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:18:08 BoogieIcfgContainer [2023-02-18 16:18:08,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 16:18:08,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 16:18:08,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 16:18:08,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 16:18:08,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 04:18:07" (1/3) ... [2023-02-18 16:18:08,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@853fa43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:18:08, skipping insertion in model container [2023-02-18 16:18:08,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:18:07" (2/3) ... [2023-02-18 16:18:08,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@853fa43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:18:08, skipping insertion in model container [2023-02-18 16:18:08,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:18:08" (3/3) ... [2023-02-18 16:18:08,079 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2023-02-18 16:18:08,089 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 16:18:08,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 16:18:08,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 16:18:08,126 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6ff1a4ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 16:18:08,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 16:18:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 16:18:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 16:18:08,132 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:08,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:08,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:08,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:08,136 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2023-02-18 16:18:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:08,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666622366] [2023-02-18 16:18:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:08,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:08,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:08,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666622366] [2023-02-18 16:18:08,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 16:18:08,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261574429] [2023-02-18 16:18:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:08,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:08,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:08,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:08,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 16:18:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:08,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 16:18:08,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 16:18:08,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:18:08,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261574429] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:18:08,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:18:08,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 16:18:08,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653220054] [2023-02-18 16:18:08,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:18:08,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 16:18:08,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:08,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 16:18:08,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 16:18:08,368 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 16:18:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:08,402 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2023-02-18 16:18:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 16:18:08,404 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-18 16:18:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:08,409 INFO L225 Difference]: With dead ends: 61 [2023-02-18 16:18:08,409 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 16:18:08,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 16:18:08,426 INFO L413 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:08,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:18:08,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 16:18:08,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-18 16:18:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 16:18:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-02-18 16:18:08,448 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2023-02-18 16:18:08,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:08,448 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-02-18 16:18:08,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 16:18:08,449 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-02-18 16:18:08,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 16:18:08,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:08,450 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:08,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:08,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-18 16:18:08,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:08,655 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2023-02-18 16:18:08,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:08,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953053250] [2023-02-18 16:18:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:08,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:08,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:08,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224744009] [2023-02-18 16:18:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:08,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:08,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:08,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:08,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 16:18:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:08,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 16:18:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 16:18:08,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:18:08,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:08,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953053250] [2023-02-18 16:18:08,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:08,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224744009] [2023-02-18 16:18:08,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224744009] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:18:08,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:18:08,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 16:18:08,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541236629] [2023-02-18 16:18:08,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:18:08,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 16:18:08,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:08,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 16:18:08,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 16:18:08,786 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 16:18:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:08,868 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2023-02-18 16:18:08,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 16:18:08,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-18 16:18:08,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:08,871 INFO L225 Difference]: With dead ends: 47 [2023-02-18 16:18:08,871 INFO L226 Difference]: Without dead ends: 40 [2023-02-18 16:18:08,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-18 16:18:08,874 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:08,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 104 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:18:08,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-18 16:18:08,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2023-02-18 16:18:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 16:18:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-02-18 16:18:08,888 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2023-02-18 16:18:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:08,889 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-02-18 16:18:08,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 16:18:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-02-18 16:18:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 16:18:08,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:08,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:08,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:09,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-18 16:18:09,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:09,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:09,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2023-02-18 16:18:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:09,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027826755] [2023-02-18 16:18:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:09,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:09,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:09,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730088779] [2023-02-18 16:18:09,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:09,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:09,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:09,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:09,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 16:18:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:09,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 16:18:09,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 16:18:09,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:18:09,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:09,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027826755] [2023-02-18 16:18:09,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:09,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730088779] [2023-02-18 16:18:09,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730088779] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:18:09,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:18:09,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 16:18:09,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14234144] [2023-02-18 16:18:09,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:18:09,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 16:18:09,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:09,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 16:18:09,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 16:18:09,282 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 16:18:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:09,345 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-18 16:18:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 16:18:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-02-18 16:18:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:09,346 INFO L225 Difference]: With dead ends: 46 [2023-02-18 16:18:09,346 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 16:18:09,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 16:18:09,347 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:09,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 140 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:18:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 16:18:09,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-02-18 16:18:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 16:18:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2023-02-18 16:18:09,357 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2023-02-18 16:18:09,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:09,358 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2023-02-18 16:18:09,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 16:18:09,358 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2023-02-18 16:18:09,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 16:18:09,358 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:09,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:09,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:09,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:09,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:09,564 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2023-02-18 16:18:09,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:09,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553209762] [2023-02-18 16:18:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:09,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:09,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:09,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457914229] [2023-02-18 16:18:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:09,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:09,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:09,586 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:09,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 16:18:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:09,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 16:18:09,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 16:18:09,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 16:18:09,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:09,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553209762] [2023-02-18 16:18:09,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:09,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457914229] [2023-02-18 16:18:09,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457914229] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:18:09,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:18:09,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-18 16:18:09,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907495039] [2023-02-18 16:18:09,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:09,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 16:18:09,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:09,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 16:18:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 16:18:09,705 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 16:18:09,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:09,828 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2023-02-18 16:18:09,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 16:18:09,828 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-02-18 16:18:09,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:09,829 INFO L225 Difference]: With dead ends: 96 [2023-02-18 16:18:09,829 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 16:18:09,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-18 16:18:09,830 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 64 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:09,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 193 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:18:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 16:18:09,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2023-02-18 16:18:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 16:18:09,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2023-02-18 16:18:09,843 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 24 [2023-02-18 16:18:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:09,844 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2023-02-18 16:18:09,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 16:18:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2023-02-18 16:18:09,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 16:18:09,845 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:09,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:09,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:10,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:10,050 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:10,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2023-02-18 16:18:10,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:10,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865774413] [2023-02-18 16:18:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:10,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:10,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:10,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067820945] [2023-02-18 16:18:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:10,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:10,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:10,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:10,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 16:18:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:10,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 16:18:10,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 16:18:10,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:10,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:10,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865774413] [2023-02-18 16:18:10,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:10,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067820945] [2023-02-18 16:18:10,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067820945] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:18:10,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:18:10,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-18 16:18:10,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883402158] [2023-02-18 16:18:10,305 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:10,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 16:18:10,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:10,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 16:18:10,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-02-18 16:18:10,307 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 16:18:10,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:10,544 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2023-02-18 16:18:10,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 16:18:10,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-02-18 16:18:10,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:10,545 INFO L225 Difference]: With dead ends: 79 [2023-02-18 16:18:10,546 INFO L226 Difference]: Without dead ends: 77 [2023-02-18 16:18:10,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-18 16:18:10,547 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:10,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 135 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:18:10,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-18 16:18:10,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2023-02-18 16:18:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 16:18:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2023-02-18 16:18:10,561 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 27 [2023-02-18 16:18:10,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:10,562 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2023-02-18 16:18:10,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 16:18:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2023-02-18 16:18:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 16:18:10,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:10,563 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:10,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:10,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:10,768 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:10,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2023-02-18 16:18:10,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:10,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32204684] [2023-02-18 16:18:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:10,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:10,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:10,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095720305] [2023-02-18 16:18:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:10,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:10,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:10,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:10,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 16:18:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:10,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 16:18:10,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 16:18:10,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:18:10,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:10,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32204684] [2023-02-18 16:18:10,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:10,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095720305] [2023-02-18 16:18:10,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095720305] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:18:10,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:18:10,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-02-18 16:18:10,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532514389] [2023-02-18 16:18:10,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:10,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 16:18:10,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:10,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 16:18:10,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 16:18:10,878 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 16:18:11,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:11,013 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2023-02-18 16:18:11,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 16:18:11,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 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 27 [2023-02-18 16:18:11,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:11,014 INFO L225 Difference]: With dead ends: 104 [2023-02-18 16:18:11,014 INFO L226 Difference]: Without dead ends: 102 [2023-02-18 16:18:11,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-18 16:18:11,015 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 41 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:11,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 253 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:18:11,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-18 16:18:11,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2023-02-18 16:18:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 16:18:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2023-02-18 16:18:11,026 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 27 [2023-02-18 16:18:11,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:11,026 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2023-02-18 16:18:11,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 16:18:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2023-02-18 16:18:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 16:18:11,028 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:11,028 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-18 16:18:11,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:11,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:11,233 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash -281586315, now seen corresponding path program 1 times [2023-02-18 16:18:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:11,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432924925] [2023-02-18 16:18:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:11,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:11,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403863997] [2023-02-18 16:18:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:11,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:11,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:11,242 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:11,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 16:18:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:11,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 16:18:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 16:18:11,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 16:18:11,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:11,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432924925] [2023-02-18 16:18:11,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:11,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403863997] [2023-02-18 16:18:11,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403863997] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 16:18:11,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:18:11,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-02-18 16:18:11,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075342312] [2023-02-18 16:18:11,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:18:11,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 16:18:11,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 16:18:11,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 16:18:11,348 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 16:18:11,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:11,395 INFO L93 Difference]: Finished difference Result 144 states and 204 transitions. [2023-02-18 16:18:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 16:18:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-18 16:18:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:11,396 INFO L225 Difference]: With dead ends: 144 [2023-02-18 16:18:11,396 INFO L226 Difference]: Without dead ends: 142 [2023-02-18 16:18:11,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 16:18:11,397 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:11,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:18:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-02-18 16:18:11,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2023-02-18 16:18:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 43 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-02-18 16:18:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 196 transitions. [2023-02-18 16:18:11,412 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 196 transitions. Word has length 32 [2023-02-18 16:18:11,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:11,413 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 196 transitions. [2023-02-18 16:18:11,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 16:18:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 196 transitions. [2023-02-18 16:18:11,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 16:18:11,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:11,414 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-18 16:18:11,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:11,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:11,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:11,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278097, now seen corresponding path program 1 times [2023-02-18 16:18:11,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:11,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100049530] [2023-02-18 16:18:11,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:11,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:11,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:11,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738490355] [2023-02-18 16:18:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:11,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:11,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:11,627 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:11,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 16:18:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:11,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 16:18:11,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 16:18:11,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:11,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:11,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100049530] [2023-02-18 16:18:11,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:11,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738490355] [2023-02-18 16:18:11,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738490355] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:18:11,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:18:11,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-18 16:18:11,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085830963] [2023-02-18 16:18:11,742 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:11,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 16:18:11,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 16:18:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-02-18 16:18:11,743 INFO L87 Difference]: Start difference. First operand 136 states and 196 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 16:18:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:11,929 INFO L93 Difference]: Finished difference Result 149 states and 207 transitions. [2023-02-18 16:18:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 16:18:11,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2023-02-18 16:18:11,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:11,930 INFO L225 Difference]: With dead ends: 149 [2023-02-18 16:18:11,931 INFO L226 Difference]: Without dead ends: 147 [2023-02-18 16:18:11,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-18 16:18:11,931 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 53 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:11,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 148 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:18:11,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-18 16:18:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2023-02-18 16:18:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 93 states have internal predecessors, (117), 43 states have call successors, (43), 8 states have call predecessors, (43), 8 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-02-18 16:18:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 202 transitions. [2023-02-18 16:18:11,944 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 202 transitions. Word has length 32 [2023-02-18 16:18:11,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:11,944 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 202 transitions. [2023-02-18 16:18:11,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 16:18:11,944 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 202 transitions. [2023-02-18 16:18:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 16:18:11,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:11,945 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:11,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:12,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-18 16:18:12,150 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:12,150 INFO L85 PathProgramCache]: Analyzing trace with hash 492814709, now seen corresponding path program 2 times [2023-02-18 16:18:12,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:12,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320600222] [2023-02-18 16:18:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:12,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:12,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:12,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138348956] [2023-02-18 16:18:12,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:18:12,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:12,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:12,158 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:12,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 16:18:12,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:18:12,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:18:12,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 16:18:12,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 16:18:12,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:18:12,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:12,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320600222] [2023-02-18 16:18:12,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:12,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138348956] [2023-02-18 16:18:12,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138348956] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:18:12,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:18:12,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 16:18:12,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732539063] [2023-02-18 16:18:12,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:18:12,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 16:18:12,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:12,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 16:18:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 16:18:12,202 INFO L87 Difference]: Start difference. First operand 144 states and 202 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 16:18:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:12,265 INFO L93 Difference]: Finished difference Result 183 states and 254 transitions. [2023-02-18 16:18:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 16:18:12,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-02-18 16:18:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:12,266 INFO L225 Difference]: With dead ends: 183 [2023-02-18 16:18:12,266 INFO L226 Difference]: Without dead ends: 127 [2023-02-18 16:18:12,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 16:18:12,267 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:12,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:18:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-18 16:18:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2023-02-18 16:18:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 76 states have internal predecessors, (91), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-18 16:18:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2023-02-18 16:18:12,277 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 32 [2023-02-18 16:18:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:12,277 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2023-02-18 16:18:12,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 16:18:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2023-02-18 16:18:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 16:18:12,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:12,278 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-18 16:18:12,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-18 16:18:12,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:12,483 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:12,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash -449167720, now seen corresponding path program 1 times [2023-02-18 16:18:12,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:12,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806623257] [2023-02-18 16:18:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:12,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:12,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:12,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583649299] [2023-02-18 16:18:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:12,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:12,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:12,491 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:12,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 16:18:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:12,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 16:18:12,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 16:18:12,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 16:18:12,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:12,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806623257] [2023-02-18 16:18:12,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:12,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583649299] [2023-02-18 16:18:12,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583649299] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 16:18:12,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:18:12,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-18 16:18:12,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274695732] [2023-02-18 16:18:12,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:18:12,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 16:18:12,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:12,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 16:18:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 16:18:12,571 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-02-18 16:18:12,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:12,658 INFO L93 Difference]: Finished difference Result 125 states and 165 transitions. [2023-02-18 16:18:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 16:18:12,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 37 [2023-02-18 16:18:12,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:12,659 INFO L225 Difference]: With dead ends: 125 [2023-02-18 16:18:12,659 INFO L226 Difference]: Without dead ends: 123 [2023-02-18 16:18:12,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 16:18:12,660 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:12,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 102 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:18:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-18 16:18:12,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-02-18 16:18:12,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.205128205128205) internal successors, (94), 79 states have internal predecessors, (94), 35 states have call successors, (35), 9 states have call predecessors, (35), 9 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-18 16:18:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2023-02-18 16:18:12,670 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 37 [2023-02-18 16:18:12,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:12,671 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2023-02-18 16:18:12,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-02-18 16:18:12,671 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2023-02-18 16:18:12,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 16:18:12,672 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:12,672 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:12,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:12,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 16:18:12,876 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:12,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1289603446, now seen corresponding path program 1 times [2023-02-18 16:18:12,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:12,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687772004] [2023-02-18 16:18:12,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:12,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:12,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:12,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428600342] [2023-02-18 16:18:12,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:12,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:12,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:12,884 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:12,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 16:18:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:12,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 16:18:12,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 16:18:13,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 16:18:13,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687772004] [2023-02-18 16:18:13,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428600342] [2023-02-18 16:18:13,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428600342] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:18:13,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:18:13,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-02-18 16:18:13,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896739358] [2023-02-18 16:18:13,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:13,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 16:18:13,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:13,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 16:18:13,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-02-18 16:18:13,683 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-18 16:18:22,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:22,505 INFO L93 Difference]: Finished difference Result 348 states and 494 transitions. [2023-02-18 16:18:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 16:18:22,506 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 49 [2023-02-18 16:18:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:22,508 INFO L225 Difference]: With dead ends: 348 [2023-02-18 16:18:22,508 INFO L226 Difference]: Without dead ends: 270 [2023-02-18 16:18:22,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 16:18:22,510 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 189 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:22,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 222 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-02-18 16:18:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-02-18 16:18:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 217. [2023-02-18 16:18:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 141 states have (on average 1.2127659574468086) internal successors, (171), 142 states have internal predecessors, (171), 63 states have call successors, (63), 12 states have call predecessors, (63), 12 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-18 16:18:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 296 transitions. [2023-02-18 16:18:22,558 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 296 transitions. Word has length 49 [2023-02-18 16:18:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:22,558 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 296 transitions. [2023-02-18 16:18:22,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-18 16:18:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 296 transitions. [2023-02-18 16:18:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 16:18:22,559 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:22,559 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 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] [2023-02-18 16:18:22,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:22,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 16:18:22,760 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:22,761 INFO L85 PathProgramCache]: Analyzing trace with hash -70799180, now seen corresponding path program 1 times [2023-02-18 16:18:22,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:22,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426707926] [2023-02-18 16:18:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:22,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:22,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859434439] [2023-02-18 16:18:22,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:22,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:22,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:22,779 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:22,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 16:18:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:22,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 16:18:22,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 16:18:23,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 16:18:23,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:23,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426707926] [2023-02-18 16:18:23,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:23,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859434439] [2023-02-18 16:18:23,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859434439] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:18:23,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:18:23,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-02-18 16:18:23,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757033454] [2023-02-18 16:18:23,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:23,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 16:18:23,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 16:18:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-02-18 16:18:23,381 INFO L87 Difference]: Start difference. First operand 217 states and 296 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-18 16:18:42,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:18:48,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:18:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:51,865 INFO L93 Difference]: Finished difference Result 325 states and 455 transitions. [2023-02-18 16:18:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 16:18:51,866 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 57 [2023-02-18 16:18:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:51,871 INFO L225 Difference]: With dead ends: 325 [2023-02-18 16:18:51,871 INFO L226 Difference]: Without dead ends: 323 [2023-02-18 16:18:51,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 16:18:51,879 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 142 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 222 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:51,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 306 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1252 Invalid, 1 Unknown, 0 Unchecked, 18.2s Time] [2023-02-18 16:18:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-02-18 16:18:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 232. [2023-02-18 16:18:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 151 states have (on average 1.1986754966887416) internal successors, (181), 153 states have internal predecessors, (181), 65 states have call successors, (65), 15 states have call predecessors, (65), 15 states have return successors, (64), 63 states have call predecessors, (64), 64 states have call successors, (64) [2023-02-18 16:18:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 310 transitions. [2023-02-18 16:18:51,935 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 310 transitions. Word has length 57 [2023-02-18 16:18:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:51,935 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 310 transitions. [2023-02-18 16:18:51,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-18 16:18:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 310 transitions. [2023-02-18 16:18:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-18 16:18:51,936 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:51,936 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 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] [2023-02-18 16:18:51,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-18 16:18:52,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 16:18:52,141 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:52,141 INFO L85 PathProgramCache]: Analyzing trace with hash 513336511, now seen corresponding path program 2 times [2023-02-18 16:18:52,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:52,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133095365] [2023-02-18 16:18:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:52,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:52,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:52,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279779477] [2023-02-18 16:18:52,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:18:52,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:52,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:52,161 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:52,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 16:18:52,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:18:52,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:18:52,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 16:18:52,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 16:18:52,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 16:18:52,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:52,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133095365] [2023-02-18 16:18:52,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:52,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279779477] [2023-02-18 16:18:52,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279779477] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 16:18:52,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 16:18:52,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 16:18:52,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409994797] [2023-02-18 16:18:52,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 16:18:52,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 16:18:52,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:52,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 16:18:52,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 16:18:52,210 INFO L87 Difference]: Start difference. First operand 232 states and 310 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 16:18:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:52,305 INFO L93 Difference]: Finished difference Result 422 states and 580 transitions. [2023-02-18 16:18:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 16:18:52,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2023-02-18 16:18:52,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:52,307 INFO L225 Difference]: With dead ends: 422 [2023-02-18 16:18:52,307 INFO L226 Difference]: Without dead ends: 283 [2023-02-18 16:18:52,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 16:18:52,308 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:52,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 103 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 16:18:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-02-18 16:18:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 268. [2023-02-18 16:18:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 165 states have (on average 1.1939393939393939) internal successors, (197), 166 states have internal predecessors, (197), 87 states have call successors, (87), 15 states have call predecessors, (87), 15 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-02-18 16:18:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 370 transitions. [2023-02-18 16:18:52,393 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 370 transitions. Word has length 62 [2023-02-18 16:18:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:52,393 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 370 transitions. [2023-02-18 16:18:52,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 16:18:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 370 transitions. [2023-02-18 16:18:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-18 16:18:52,394 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:52,394 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:52,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:52,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 16:18:52,599 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:52,600 INFO L85 PathProgramCache]: Analyzing trace with hash -420355271, now seen corresponding path program 3 times [2023-02-18 16:18:52,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:52,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762267464] [2023-02-18 16:18:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:52,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:52,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:52,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113166080] [2023-02-18 16:18:52,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:18:52,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:52,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:52,615 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:52,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 16:18:52,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 16:18:52,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:18:52,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-18 16:18:52,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:18:52,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:18:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 16:18:53,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:18:53,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762267464] [2023-02-18 16:18:53,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:18:53,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113166080] [2023-02-18 16:18:53,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113166080] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:18:53,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:18:53,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2023-02-18 16:18:53,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573917216] [2023-02-18 16:18:53,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:18:53,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 16:18:53,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:18:53,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 16:18:53,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2023-02-18 16:18:53,327 INFO L87 Difference]: Start difference. First operand 268 states and 370 transitions. Second operand has 28 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-18 16:18:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:18:57,051 INFO L93 Difference]: Finished difference Result 359 states and 486 transitions. [2023-02-18 16:18:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 16:18:57,056 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 62 [2023-02-18 16:18:57,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:18:57,059 INFO L225 Difference]: With dead ends: 359 [2023-02-18 16:18:57,059 INFO L226 Difference]: Without dead ends: 357 [2023-02-18 16:18:57,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=663, Invalid=2529, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 16:18:57,060 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 181 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:18:57,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 236 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-18 16:18:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-02-18 16:18:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 339. [2023-02-18 16:18:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 211 states have (on average 1.180094786729858) internal successors, (249), 214 states have internal predecessors, (249), 107 states have call successors, (107), 20 states have call predecessors, (107), 20 states have return successors, (106), 104 states have call predecessors, (106), 106 states have call successors, (106) [2023-02-18 16:18:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 462 transitions. [2023-02-18 16:18:57,189 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 462 transitions. Word has length 62 [2023-02-18 16:18:57,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:18:57,189 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 462 transitions. [2023-02-18 16:18:57,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-18 16:18:57,189 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 462 transitions. [2023-02-18 16:18:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-18 16:18:57,190 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:18:57,190 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:18:57,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 16:18:57,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:57,395 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:18:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:18:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash -819166674, now seen corresponding path program 1 times [2023-02-18 16:18:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:18:57,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093674795] [2023-02-18 16:18:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:57,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:18:57,409 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:18:57,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128077676] [2023-02-18 16:18:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:18:57,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:18:57,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:18:57,412 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:18:57,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 16:18:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:18:57,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-18 16:18:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:18:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-18 16:18:57,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:19:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-18 16:19:01,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:19:01,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093674795] [2023-02-18 16:19:01,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:19:01,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128077676] [2023-02-18 16:19:01,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128077676] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:19:01,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:19:01,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2023-02-18 16:19:01,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117576267] [2023-02-18 16:19:01,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:19:01,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 16:19:01,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:19:01,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 16:19:01,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 16:19:01,168 INFO L87 Difference]: Start difference. First operand 339 states and 462 transitions. Second operand has 34 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 16:19:10,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:19:23,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:19:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:19:34,535 INFO L93 Difference]: Finished difference Result 564 states and 785 transitions. [2023-02-18 16:19:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-02-18 16:19:34,536 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 76 [2023-02-18 16:19:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:19:34,541 INFO L225 Difference]: With dead ends: 564 [2023-02-18 16:19:34,541 INFO L226 Difference]: Without dead ends: 560 [2023-02-18 16:19:34,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3380 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=1976, Invalid=8944, Unknown=0, NotChecked=0, Total=10920 [2023-02-18 16:19:34,545 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 341 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 3026 mSolverCounterSat, 645 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 3673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 3026 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:19:34,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 498 Invalid, 3673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 3026 Invalid, 2 Unknown, 0 Unchecked, 22.2s Time] [2023-02-18 16:19:34,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-02-18 16:19:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 511. [2023-02-18 16:19:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 322 states have (on average 1.1925465838509317) internal successors, (384), 326 states have internal predecessors, (384), 161 states have call successors, (161), 27 states have call predecessors, (161), 27 states have return successors, (160), 157 states have call predecessors, (160), 160 states have call successors, (160) [2023-02-18 16:19:34,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 705 transitions. [2023-02-18 16:19:34,914 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 705 transitions. Word has length 76 [2023-02-18 16:19:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:19:34,915 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 705 transitions. [2023-02-18 16:19:34,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 16:19:34,915 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 705 transitions. [2023-02-18 16:19:34,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 16:19:34,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:19:34,917 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:19:34,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 16:19:35,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 16:19:35,122 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:19:35,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:19:35,123 INFO L85 PathProgramCache]: Analyzing trace with hash 685229769, now seen corresponding path program 1 times [2023-02-18 16:19:35,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:19:35,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168298352] [2023-02-18 16:19:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:19:35,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:19:35,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:19:35,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453260695] [2023-02-18 16:19:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:19:35,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:19:35,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:19:35,143 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:19:35,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 16:19:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:19:35,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 16:19:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:19:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-02-18 16:19:35,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:19:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-02-18 16:19:35,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:19:35,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168298352] [2023-02-18 16:19:35,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:19:35,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453260695] [2023-02-18 16:19:35,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453260695] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:19:35,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:19:35,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-18 16:19:35,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185264739] [2023-02-18 16:19:35,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:19:35,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 16:19:35,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:19:35,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 16:19:35,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-18 16:19:35,518 INFO L87 Difference]: Start difference. First operand 511 states and 705 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-18 16:19:38,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:19:38,340 INFO L93 Difference]: Finished difference Result 1022 states and 1544 transitions. [2023-02-18 16:19:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 16:19:38,341 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 79 [2023-02-18 16:19:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:19:38,344 INFO L225 Difference]: With dead ends: 1022 [2023-02-18 16:19:38,344 INFO L226 Difference]: Without dead ends: 1020 [2023-02-18 16:19:38,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 16:19:38,346 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 150 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:19:38,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 417 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-18 16:19:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2023-02-18 16:19:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 938. [2023-02-18 16:19:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 493 states have (on average 1.2758620689655173) internal successors, (629), 497 states have internal predecessors, (629), 413 states have call successors, (413), 31 states have call predecessors, (413), 31 states have return successors, (412), 409 states have call predecessors, (412), 412 states have call successors, (412) [2023-02-18 16:19:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1454 transitions. [2023-02-18 16:19:39,195 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1454 transitions. Word has length 79 [2023-02-18 16:19:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:19:39,195 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1454 transitions. [2023-02-18 16:19:39,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-18 16:19:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1454 transitions. [2023-02-18 16:19:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-18 16:19:39,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:19:39,199 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:19:39,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 16:19:39,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 16:19:39,404 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:19:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:19:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1959088841, now seen corresponding path program 2 times [2023-02-18 16:19:39,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:19:39,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695052835] [2023-02-18 16:19:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:19:39,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:19:39,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:19:39,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291092548] [2023-02-18 16:19:39,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:19:39,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:19:39,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:19:39,426 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:19:39,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 16:19:39,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:19:39,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:19:39,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 16:19:39,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:19:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-18 16:19:39,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:19:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-18 16:19:39,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:19:39,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695052835] [2023-02-18 16:19:39,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:19:39,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291092548] [2023-02-18 16:19:39,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291092548] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:19:39,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:19:39,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2023-02-18 16:19:39,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429872565] [2023-02-18 16:19:39,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:19:39,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 16:19:39,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:19:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 16:19:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-18 16:19:39,558 INFO L87 Difference]: Start difference. First operand 938 states and 1454 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-18 16:19:40,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:19:40,841 INFO L93 Difference]: Finished difference Result 1099 states and 1702 transitions. [2023-02-18 16:19:40,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 16:19:40,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 84 [2023-02-18 16:19:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:19:40,850 INFO L225 Difference]: With dead ends: 1099 [2023-02-18 16:19:40,850 INFO L226 Difference]: Without dead ends: 1092 [2023-02-18 16:19:40,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 157 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2023-02-18 16:19:40,852 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 81 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:19:40,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 316 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:19:40,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2023-02-18 16:19:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 904. [2023-02-18 16:19:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 465 states have (on average 1.2860215053763442) internal successors, (598), 468 states have internal predecessors, (598), 407 states have call successors, (407), 31 states have call predecessors, (407), 31 states have return successors, (406), 404 states have call predecessors, (406), 406 states have call successors, (406) [2023-02-18 16:19:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1411 transitions. [2023-02-18 16:19:41,655 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1411 transitions. Word has length 84 [2023-02-18 16:19:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:19:41,656 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1411 transitions. [2023-02-18 16:19:41,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-18 16:19:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1411 transitions. [2023-02-18 16:19:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-18 16:19:41,657 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:19:41,657 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:19:41,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-18 16:19:41,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 16:19:41,868 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:19:41,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:19:41,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1810606754, now seen corresponding path program 2 times [2023-02-18 16:19:41,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:19:41,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407536720] [2023-02-18 16:19:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:19:41,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:19:41,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:19:41,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209264877] [2023-02-18 16:19:41,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:19:41,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:19:41,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:19:41,875 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:19:41,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 16:19:41,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:19:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:19:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 16:19:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:19:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 29 proven. 58 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-02-18 16:19:42,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:19:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-02-18 16:19:46,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:19:46,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407536720] [2023-02-18 16:19:46,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:19:46,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209264877] [2023-02-18 16:19:46,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209264877] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:19:46,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:19:46,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-18 16:19:46,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66373417] [2023-02-18 16:19:46,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:19:46,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 16:19:46,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:19:46,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 16:19:46,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2023-02-18 16:19:46,199 INFO L87 Difference]: Start difference. First operand 904 states and 1411 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2023-02-18 16:20:10,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:20:21,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:20:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:20:22,831 INFO L93 Difference]: Finished difference Result 1464 states and 2266 transitions. [2023-02-18 16:20:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-18 16:20:22,832 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 96 [2023-02-18 16:20:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:20:22,836 INFO L225 Difference]: With dead ends: 1464 [2023-02-18 16:20:22,836 INFO L226 Difference]: Without dead ends: 1143 [2023-02-18 16:20:22,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=1622, Invalid=7120, Unknown=0, NotChecked=0, Total=8742 [2023-02-18 16:20:22,839 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 254 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 646 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:20:22,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 331 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 1984 Invalid, 1 Unknown, 0 Unchecked, 24.7s Time] [2023-02-18 16:20:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2023-02-18 16:20:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1087. [2023-02-18 16:20:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 568 states have (on average 1.272887323943662) internal successors, (723), 572 states have internal predecessors, (723), 481 states have call successors, (481), 37 states have call predecessors, (481), 37 states have return successors, (480), 477 states have call predecessors, (480), 480 states have call successors, (480) [2023-02-18 16:20:23,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1684 transitions. [2023-02-18 16:20:23,943 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1684 transitions. Word has length 96 [2023-02-18 16:20:23,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:20:23,943 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1684 transitions. [2023-02-18 16:20:23,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2023-02-18 16:20:23,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1684 transitions. [2023-02-18 16:20:23,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-18 16:20:23,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:20:23,945 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:20:23,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 16:20:24,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 16:20:24,151 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:20:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:20:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1865302579, now seen corresponding path program 1 times [2023-02-18 16:20:24,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:20:24,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727433512] [2023-02-18 16:20:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:20:24,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:20:24,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:20:24,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536071733] [2023-02-18 16:20:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:20:24,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:20:24,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:20:24,159 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:20:24,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 16:20:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:20:24,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-18 16:20:24,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:20:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 52 proven. 68 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2023-02-18 16:20:24,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:20:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 61 proven. 56 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-02-18 16:20:26,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:20:26,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727433512] [2023-02-18 16:20:26,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:20:26,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536071733] [2023-02-18 16:20:26,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536071733] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:20:26,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:20:26,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 37 [2023-02-18 16:20:26,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701545840] [2023-02-18 16:20:26,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:20:26,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 16:20:26,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:20:26,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 16:20:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 16:20:26,313 INFO L87 Difference]: Start difference. First operand 1087 states and 1684 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-18 16:20:32,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:20:34,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:20:37,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:20:47,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:21:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:21:05,223 INFO L93 Difference]: Finished difference Result 1300 states and 1977 transitions. [2023-02-18 16:21:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-18 16:21:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 109 [2023-02-18 16:21:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:21:05,228 INFO L225 Difference]: With dead ends: 1300 [2023-02-18 16:21:05,228 INFO L226 Difference]: Without dead ends: 1298 [2023-02-18 16:21:05,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 180 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1351, Invalid=6131, Unknown=0, NotChecked=0, Total=7482 [2023-02-18 16:21:05,230 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 269 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 2966 mSolverCounterSat, 712 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 3680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 2966 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:21:05,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 512 Invalid, 3680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [712 Valid, 2966 Invalid, 2 Unknown, 0 Unchecked, 27.4s Time] [2023-02-18 16:21:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2023-02-18 16:21:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1168. [2023-02-18 16:21:06,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 631 states have (on average 1.2472266244057053) internal successors, (787), 641 states have internal predecessors, (787), 493 states have call successors, (493), 43 states have call predecessors, (493), 43 states have return successors, (492), 483 states have call predecessors, (492), 492 states have call successors, (492) [2023-02-18 16:21:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1772 transitions. [2023-02-18 16:21:06,494 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1772 transitions. Word has length 109 [2023-02-18 16:21:06,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:21:06,495 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 1772 transitions. [2023-02-18 16:21:06,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-18 16:21:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1772 transitions. [2023-02-18 16:21:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-18 16:21:06,499 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:21:06,499 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:21:06,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 16:21:06,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:21:06,705 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:21:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:21:06,705 INFO L85 PathProgramCache]: Analyzing trace with hash 304105922, now seen corresponding path program 3 times [2023-02-18 16:21:06,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:21:06,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446769377] [2023-02-18 16:21:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:21:06,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:21:06,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:21:06,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992492029] [2023-02-18 16:21:06,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:21:06,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:21:06,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:21:06,719 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:21:06,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 16:21:07,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 16:21:07,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:21:07,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-18 16:21:07,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:21:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 88 proven. 42 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2023-02-18 16:21:07,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:21:10,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:21:10,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446769377] [2023-02-18 16:21:10,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:21:10,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992492029] [2023-02-18 16:21:10,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992492029] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:21:10,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:21:10,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-18 16:21:10,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946339765] [2023-02-18 16:21:10,239 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:21:10,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 16:21:10,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:21:10,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 16:21:10,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2023-02-18 16:21:10,240 INFO L87 Difference]: Start difference. First operand 1168 states and 1772 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 16:21:15,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:21:15,307 INFO L93 Difference]: Finished difference Result 1360 states and 2063 transitions. [2023-02-18 16:21:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 16:21:15,308 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 123 [2023-02-18 16:21:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:21:15,312 INFO L225 Difference]: With dead ends: 1360 [2023-02-18 16:21:15,312 INFO L226 Difference]: Without dead ends: 1357 [2023-02-18 16:21:15,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 16:21:15,314 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 85 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:21:15,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 363 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-02-18 16:21:15,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2023-02-18 16:21:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1336. [2023-02-18 16:21:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 712 states have (on average 1.2542134831460674) internal successors, (893), 722 states have internal predecessors, (893), 573 states have call successors, (573), 50 states have call predecessors, (573), 50 states have return successors, (572), 563 states have call predecessors, (572), 572 states have call successors, (572) [2023-02-18 16:21:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2038 transitions. [2023-02-18 16:21:16,818 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2038 transitions. Word has length 123 [2023-02-18 16:21:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:21:16,818 INFO L495 AbstractCegarLoop]: Abstraction has 1336 states and 2038 transitions. [2023-02-18 16:21:16,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 16:21:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2038 transitions. [2023-02-18 16:21:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-18 16:21:16,820 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:21:16,821 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:21:16,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 16:21:17,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:21:17,026 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:21:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:21:17,026 INFO L85 PathProgramCache]: Analyzing trace with hash 702171882, now seen corresponding path program 4 times [2023-02-18 16:21:17,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:21:17,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60669703] [2023-02-18 16:21:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:21:17,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:21:17,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:21:17,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48542311] [2023-02-18 16:21:17,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:21:17,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:21:17,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:21:17,034 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:21:17,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 16:21:17,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:21:17,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:21:17,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 90 conjunts are in the unsatisfiable core [2023-02-18 16:21:17,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:21:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 70 proven. 66 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2023-02-18 16:21:17,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:21:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 70 proven. 63 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-02-18 16:21:20,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:21:20,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60669703] [2023-02-18 16:21:20,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:21:20,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48542311] [2023-02-18 16:21:20,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48542311] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:21:20,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:21:20,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 39 [2023-02-18 16:21:20,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784720484] [2023-02-18 16:21:20,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:21:20,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 16:21:20,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:21:20,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 16:21:20,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 16:21:20,335 INFO L87 Difference]: Start difference. First operand 1336 states and 2038 transitions. Second operand has 39 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 14 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-18 16:21:32,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:21:46,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:22:01,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:22:17,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:22:43,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:22:56,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:22:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:22:57,523 INFO L93 Difference]: Finished difference Result 1828 states and 2805 transitions. [2023-02-18 16:22:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-02-18 16:22:57,524 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 14 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 123 [2023-02-18 16:22:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:22:57,530 INFO L225 Difference]: With dead ends: 1828 [2023-02-18 16:22:57,530 INFO L226 Difference]: Without dead ends: 1820 [2023-02-18 16:22:57,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7196 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=3716, Invalid=18336, Unknown=0, NotChecked=0, Total=22052 [2023-02-18 16:22:57,533 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 453 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 4543 mSolverCounterSat, 1254 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 5803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1254 IncrementalHoareTripleChecker+Valid, 4543 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:22:57,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 612 Invalid, 5803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1254 Valid, 4543 Invalid, 6 Unknown, 0 Unchecked, 65.7s Time] [2023-02-18 16:22:57,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2023-02-18 16:22:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1628. [2023-02-18 16:22:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 872 states have (on average 1.2580275229357798) internal successors, (1097), 885 states have internal predecessors, (1097), 699 states have call successors, (699), 56 states have call predecessors, (699), 56 states have return successors, (698), 686 states have call predecessors, (698), 698 states have call successors, (698) [2023-02-18 16:22:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2494 transitions. [2023-02-18 16:22:59,905 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2494 transitions. Word has length 123 [2023-02-18 16:22:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:22:59,907 INFO L495 AbstractCegarLoop]: Abstraction has 1628 states and 2494 transitions. [2023-02-18 16:22:59,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 14 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-18 16:22:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2494 transitions. [2023-02-18 16:22:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-18 16:22:59,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:22:59,920 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:22:59,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-18 16:23:00,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:23:00,125 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:23:00,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:23:00,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1890512647, now seen corresponding path program 5 times [2023-02-18 16:23:00,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:23:00,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484993527] [2023-02-18 16:23:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:23:00,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:23:00,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:23:00,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613444932] [2023-02-18 16:23:00,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:23:00,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:23:00,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:23:00,150 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:23:00,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 16:23:00,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 16:23:00,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:23:00,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 115 conjunts are in the unsatisfiable core [2023-02-18 16:23:00,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:23:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 113 proven. 108 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2023-02-18 16:23:00,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:23:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 87 proven. 101 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2023-02-18 16:23:06,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:23:06,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484993527] [2023-02-18 16:23:06,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:23:06,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613444932] [2023-02-18 16:23:06,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613444932] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:23:06,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:23:06,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2023-02-18 16:23:06,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475507470] [2023-02-18 16:23:06,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:23:06,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 16:23:06,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:23:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 16:23:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1286, Unknown=1, NotChecked=0, Total=1560 [2023-02-18 16:23:06,745 INFO L87 Difference]: Start difference. First operand 1628 states and 2494 transitions. Second operand has 40 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 12 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 10 states have call successors, (34) [2023-02-18 16:23:17,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:19,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:21,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:23,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:26,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:27,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:30,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:33,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:35,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:38,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:43,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:45,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:51,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:53,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:57,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:23:59,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:00,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:06,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:08,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:12,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:14,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:16,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:19,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:21,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:24,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:32,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:34,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:36,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:39,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:44,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:51,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:56,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:24:58,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:25:00,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:25:03,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:25:05,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:25:12,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:25:12,395 INFO L93 Difference]: Finished difference Result 2053 states and 3144 transitions. [2023-02-18 16:25:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-02-18 16:25:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 12 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 10 states have call successors, (34) Word has length 128 [2023-02-18 16:25:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:25:12,403 INFO L225 Difference]: With dead ends: 2053 [2023-02-18 16:25:12,404 INFO L226 Difference]: Without dead ends: 2043 [2023-02-18 16:25:12,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 210 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=2776, Invalid=10795, Unknown=1, NotChecked=0, Total=13572 [2023-02-18 16:25:12,405 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 478 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 3364 mSolverCounterSat, 1116 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 4504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1116 IncrementalHoareTripleChecker+Valid, 3364 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:25:12,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 612 Invalid, 4504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1116 Valid, 3364 Invalid, 24 Unknown, 0 Unchecked, 101.1s Time] [2023-02-18 16:25:12,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2023-02-18 16:25:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1728. [2023-02-18 16:25:16,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 916 states have (on average 1.2565502183406114) internal successors, (1151), 929 states have internal predecessors, (1151), 747 states have call successors, (747), 64 states have call predecessors, (747), 64 states have return successors, (746), 734 states have call predecessors, (746), 746 states have call successors, (746) [2023-02-18 16:25:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2644 transitions. [2023-02-18 16:25:16,528 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2644 transitions. Word has length 128 [2023-02-18 16:25:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:25:16,528 INFO L495 AbstractCegarLoop]: Abstraction has 1728 states and 2644 transitions. [2023-02-18 16:25:16,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 12 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 10 states have call successors, (34) [2023-02-18 16:25:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2644 transitions. [2023-02-18 16:25:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-18 16:25:16,531 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:25:16,531 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:25:16,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 16:25:16,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:16,751 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:25:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:25:16,752 INFO L85 PathProgramCache]: Analyzing trace with hash 844715275, now seen corresponding path program 6 times [2023-02-18 16:25:16,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:25:16,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282890533] [2023-02-18 16:25:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:25:16,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:25:16,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:25:16,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126871817] [2023-02-18 16:25:16,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:25:16,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:25:16,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:25:16,762 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:25:16,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 16:25:19,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 16:25:19,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:25:19,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-18 16:25:19,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:25:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 69 proven. 129 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2023-02-18 16:25:26,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:25:43,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:25:43,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282890533] [2023-02-18 16:25:43,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:25:43,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126871817] [2023-02-18 16:25:43,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126871817] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:25:43,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:25:43,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-18 16:25:43,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885789683] [2023-02-18 16:25:43,028 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:25:43,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 16:25:43,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:25:43,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 16:25:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1022, Unknown=3, NotChecked=0, Total=1190 [2023-02-18 16:25:43,029 INFO L87 Difference]: Start difference. First operand 1728 states and 2644 transitions. Second operand has 27 states, 25 states have (on average 1.92) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2023-02-18 16:26:09,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:11,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:15,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:17,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:18,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:19,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:21,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:23,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:24,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:26:29,309 INFO L93 Difference]: Finished difference Result 2040 states and 3114 transitions. [2023-02-18 16:26:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 16:26:29,310 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.92) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 131 [2023-02-18 16:26:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:26:29,316 INFO L225 Difference]: With dead ends: 2040 [2023-02-18 16:26:29,316 INFO L226 Difference]: Without dead ends: 2033 [2023-02-18 16:26:29,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=319, Invalid=2128, Unknown=3, NotChecked=0, Total=2450 [2023-02-18 16:26:29,318 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 95 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 68 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:26:29,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 530 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2084 Invalid, 2 Unknown, 0 Unchecked, 32.2s Time] [2023-02-18 16:26:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2023-02-18 16:26:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1938. [2023-02-18 16:26:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1020 states have (on average 1.2607843137254902) internal successors, (1286), 1033 states have internal predecessors, (1286), 847 states have call successors, (847), 70 states have call predecessors, (847), 70 states have return successors, (846), 834 states have call predecessors, (846), 846 states have call successors, (846) [2023-02-18 16:26:34,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2979 transitions. [2023-02-18 16:26:34,117 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2979 transitions. Word has length 131 [2023-02-18 16:26:34,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:26:34,117 INFO L495 AbstractCegarLoop]: Abstraction has 1938 states and 2979 transitions. [2023-02-18 16:26:34,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.92) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2023-02-18 16:26:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2979 transitions. [2023-02-18 16:26:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-02-18 16:26:34,120 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:26:34,120 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:26:34,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 16:26:34,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:26:34,326 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:26:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:26:34,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1937312446, now seen corresponding path program 7 times [2023-02-18 16:26:34,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:26:34,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002408762] [2023-02-18 16:26:34,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:26:34,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:26:34,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:26:34,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487874963] [2023-02-18 16:26:34,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:26:34,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:26:34,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:26:34,334 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:26:34,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 16:26:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:26:34,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 135 conjunts are in the unsatisfiable core [2023-02-18 16:26:34,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:26:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 78 proven. 148 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2023-02-18 16:26:34,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:26:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 138 proven. 72 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-02-18 16:26:38,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:26:38,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002408762] [2023-02-18 16:26:38,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:26:38,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487874963] [2023-02-18 16:26:38,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487874963] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:26:38,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:26:38,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 18] total 44 [2023-02-18 16:26:38,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684405523] [2023-02-18 16:26:38,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:26:38,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 16:26:38,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:26:38,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 16:26:38,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1632, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 16:26:38,996 INFO L87 Difference]: Start difference. First operand 1938 states and 2979 transitions. Second operand has 44 states, 42 states have (on average 2.238095238095238) internal successors, (94), 40 states have internal predecessors, (94), 14 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-18 16:26:52,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:54,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:56,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:26:58,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:27:04,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:27:06,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:27:14,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:27:21,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:27:42,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:27:45,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:28:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:28:16,288 INFO L93 Difference]: Finished difference Result 2360 states and 3611 transitions. [2023-02-18 16:28:16,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-02-18 16:28:16,289 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.238095238095238) internal successors, (94), 40 states have internal predecessors, (94), 14 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 12 states have call successors, (36) Word has length 136 [2023-02-18 16:28:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:28:16,296 INFO L225 Difference]: With dead ends: 2360 [2023-02-18 16:28:16,297 INFO L226 Difference]: Without dead ends: 2351 [2023-02-18 16:28:16,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 246 SyntacticMatches, 5 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6941 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=3073, Invalid=18979, Unknown=0, NotChecked=0, Total=22052 [2023-02-18 16:28:16,299 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 593 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 5116 mSolverCounterSat, 1388 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 6512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1388 IncrementalHoareTripleChecker+Valid, 5116 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:28:16,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 757 Invalid, 6512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1388 Valid, 5116 Invalid, 8 Unknown, 0 Unchecked, 68.5s Time] [2023-02-18 16:28:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2023-02-18 16:28:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2070. [2023-02-18 16:28:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 1071 states have (on average 1.26890756302521) internal successors, (1359), 1081 states have internal predecessors, (1359), 921 states have call successors, (921), 77 states have call predecessors, (921), 77 states have return successors, (920), 911 states have call predecessors, (920), 920 states have call successors, (920) [2023-02-18 16:28:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 3200 transitions. [2023-02-18 16:28:22,096 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 3200 transitions. Word has length 136 [2023-02-18 16:28:22,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:28:22,096 INFO L495 AbstractCegarLoop]: Abstraction has 2070 states and 3200 transitions. [2023-02-18 16:28:22,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.238095238095238) internal successors, (94), 40 states have internal predecessors, (94), 14 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-18 16:28:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 3200 transitions. [2023-02-18 16:28:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-02-18 16:28:22,100 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:28:22,100 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:28:22,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-18 16:28:22,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:28:22,305 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:28:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:28:22,306 INFO L85 PathProgramCache]: Analyzing trace with hash -135793191, now seen corresponding path program 8 times [2023-02-18 16:28:22,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:28:22,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125976246] [2023-02-18 16:28:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:28:22,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:28:22,313 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:28:22,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690891578] [2023-02-18 16:28:22,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:28:22,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:28:22,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:28:22,317 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:28:22,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 16:28:22,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:28:22,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:28:22,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 16:28:22,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:28:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 352 proven. 18 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2023-02-18 16:28:22,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:28:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 104 proven. 18 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2023-02-18 16:28:22,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:28:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125976246] [2023-02-18 16:28:22,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:28:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690891578] [2023-02-18 16:28:22,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690891578] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:28:22,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:28:22,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2023-02-18 16:28:22,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166023606] [2023-02-18 16:28:22,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:28:22,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 16:28:22,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:28:22,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 16:28:22,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-18 16:28:22,429 INFO L87 Difference]: Start difference. First operand 2070 states and 3200 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-02-18 16:28:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:28:28,863 INFO L93 Difference]: Finished difference Result 3484 states and 5416 transitions. [2023-02-18 16:28:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 16:28:28,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 148 [2023-02-18 16:28:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:28:28,870 INFO L225 Difference]: With dead ends: 3484 [2023-02-18 16:28:28,870 INFO L226 Difference]: Without dead ends: 2354 [2023-02-18 16:28:28,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 284 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-18 16:28:28,874 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 11 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:28:28,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 219 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:28:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2023-02-18 16:28:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2184. [2023-02-18 16:28:34,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 1158 states have (on average 1.2573402417962003) internal successors, (1456), 1194 states have internal predecessors, (1456), 949 states have call successors, (949), 76 states have call predecessors, (949), 76 states have return successors, (948), 913 states have call predecessors, (948), 948 states have call successors, (948) [2023-02-18 16:28:34,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3353 transitions. [2023-02-18 16:28:34,828 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3353 transitions. Word has length 148 [2023-02-18 16:28:34,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:28:34,828 INFO L495 AbstractCegarLoop]: Abstraction has 2184 states and 3353 transitions. [2023-02-18 16:28:34,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-02-18 16:28:34,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3353 transitions. [2023-02-18 16:28:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-02-18 16:28:34,832 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:28:34,832 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:28:34,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-02-18 16:28:35,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-18 16:28:35,037 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:28:35,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:28:35,037 INFO L85 PathProgramCache]: Analyzing trace with hash -706567089, now seen corresponding path program 2 times [2023-02-18 16:28:35,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:28:35,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187429042] [2023-02-18 16:28:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:28:35,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:28:35,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:28:35,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024299032] [2023-02-18 16:28:35,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:28:35,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:28:35,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:28:35,045 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:28:35,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 16:28:35,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:28:35,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:28:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 89 conjunts are in the unsatisfiable core [2023-02-18 16:28:35,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:28:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 151 proven. 111 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2023-02-18 16:28:35,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:28:36,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:28:36,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187429042] [2023-02-18 16:28:36,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:28:36,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024299032] [2023-02-18 16:28:36,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024299032] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:28:36,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 16:28:36,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-02-18 16:28:36,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061152215] [2023-02-18 16:28:36,386 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 16:28:36,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 16:28:36,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:28:36,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 16:28:36,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2023-02-18 16:28:36,387 INFO L87 Difference]: Start difference. First operand 2184 states and 3353 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2023-02-18 16:28:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:28:44,672 INFO L93 Difference]: Finished difference Result 2493 states and 3832 transitions. [2023-02-18 16:28:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 16:28:44,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 153 [2023-02-18 16:28:44,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:28:44,681 INFO L225 Difference]: With dead ends: 2493 [2023-02-18 16:28:44,681 INFO L226 Difference]: Without dead ends: 2491 [2023-02-18 16:28:44,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=233, Invalid=1489, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 16:28:44,682 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 91 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:28:44,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 438 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 16:28:44,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2023-02-18 16:28:51,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 2446. [2023-02-18 16:28:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2446 states, 1287 states have (on average 1.2641802641802642) internal successors, (1627), 1327 states have internal predecessors, (1627), 1074 states have call successors, (1074), 84 states have call predecessors, (1074), 84 states have return successors, (1073), 1034 states have call predecessors, (1073), 1073 states have call successors, (1073) [2023-02-18 16:28:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3774 transitions. [2023-02-18 16:28:51,560 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3774 transitions. Word has length 153 [2023-02-18 16:28:51,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:28:51,560 INFO L495 AbstractCegarLoop]: Abstraction has 2446 states and 3774 transitions. [2023-02-18 16:28:51,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2023-02-18 16:28:51,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3774 transitions. [2023-02-18 16:28:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-02-18 16:28:51,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:28:51,563 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:28:51,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-18 16:28:51,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 16:28:51,773 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:28:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:28:51,774 INFO L85 PathProgramCache]: Analyzing trace with hash -770930272, now seen corresponding path program 9 times [2023-02-18 16:28:51,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:28:51,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321966195] [2023-02-18 16:28:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:28:51,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:28:51,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:28:51,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16573822] [2023-02-18 16:28:51,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:28:51,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:28:51,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:28:51,781 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:28:51,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 16:28:51,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 16:28:51,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:28:51,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 112 conjunts are in the unsatisfiable core [2023-02-18 16:28:51,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:28:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 43 proven. 108 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2023-02-18 16:28:52,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:28:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 40 proven. 108 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2023-02-18 16:28:57,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:28:57,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321966195] [2023-02-18 16:28:57,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:28:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16573822] [2023-02-18 16:28:57,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16573822] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:28:57,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:28:57,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 43 [2023-02-18 16:28:57,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752774938] [2023-02-18 16:28:57,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:28:57,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 16:28:57,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:28:57,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 16:28:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1567, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 16:28:57,849 INFO L87 Difference]: Start difference. First operand 2446 states and 3774 transitions. Second operand has 43 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 13 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 12 states have call predecessors, (43), 11 states have call successors, (43) [2023-02-18 16:29:07,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:29:14,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:29:17,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:29:21,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:29:23,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:29:41,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:29:46,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:30:00,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:30:21,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:31:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:31:18,061 INFO L93 Difference]: Finished difference Result 3193 states and 4924 transitions. [2023-02-18 16:31:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-02-18 16:31:18,062 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 13 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 12 states have call predecessors, (43), 11 states have call successors, (43) Word has length 153 [2023-02-18 16:31:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:31:18,074 INFO L225 Difference]: With dead ends: 3193 [2023-02-18 16:31:18,075 INFO L226 Difference]: Without dead ends: 3189 [2023-02-18 16:31:18,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9945 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=4350, Invalid=26100, Unknown=0, NotChecked=0, Total=30450 [2023-02-18 16:31:18,077 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 654 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 5400 mSolverCounterSat, 1609 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 7015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1609 IncrementalHoareTripleChecker+Valid, 5400 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.9s IncrementalHoareTripleChecker+Time [2023-02-18 16:31:18,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 1456 Invalid, 7015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1609 Valid, 5400 Invalid, 6 Unknown, 0 Unchecked, 93.9s Time] [2023-02-18 16:31:18,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2023-02-18 16:31:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2672. [2023-02-18 16:31:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 1414 states have (on average 1.2616690240452617) internal successors, (1784), 1457 states have internal predecessors, (1784), 1166 states have call successors, (1166), 91 states have call predecessors, (1166), 91 states have return successors, (1165), 1123 states have call predecessors, (1165), 1165 states have call successors, (1165) [2023-02-18 16:31:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 4115 transitions. [2023-02-18 16:31:26,750 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 4115 transitions. Word has length 153 [2023-02-18 16:31:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:31:26,750 INFO L495 AbstractCegarLoop]: Abstraction has 2672 states and 4115 transitions. [2023-02-18 16:31:26,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 13 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 12 states have call predecessors, (43), 11 states have call successors, (43) [2023-02-18 16:31:26,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 4115 transitions. [2023-02-18 16:31:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-18 16:31:26,754 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:31:26,754 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:31:26,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 16:31:26,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 16:31:26,961 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:31:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:31:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1830208317, now seen corresponding path program 3 times [2023-02-18 16:31:26,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:31:26,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802753518] [2023-02-18 16:31:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:31:26,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:31:26,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 16:31:26,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78660909] [2023-02-18 16:31:26,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:31:26,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:31:26,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:31:26,970 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:31:26,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 16:31:27,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 16:31:27,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:31:27,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-18 16:31:27,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:31:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 101 proven. 116 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2023-02-18 16:31:27,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:31:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 103 proven. 114 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2023-02-18 16:31:30,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:31:30,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802753518] [2023-02-18 16:31:30,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 16:31:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78660909] [2023-02-18 16:31:30,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78660909] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:31:30,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 16:31:30,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2023-02-18 16:31:30,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121803826] [2023-02-18 16:31:30,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 16:31:30,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 16:31:30,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:31:30,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 16:31:30,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 16:31:30,094 INFO L87 Difference]: Start difference. First operand 2672 states and 4115 transitions. Second operand has 39 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 15 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (44), 13 states have call predecessors, (44), 13 states have call successors, (44) [2023-02-18 16:31:35,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:31:37,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:31:47,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:31:49,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:31:55,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:31:57,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:32:01,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:32:04,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:32:14,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:32:16,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:32:21,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:32:27,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 16:32:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:32:39,868 INFO L93 Difference]: Finished difference Result 3013 states and 4572 transitions. [2023-02-18 16:32:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-18 16:32:39,869 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 15 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (44), 13 states have call predecessors, (44), 13 states have call successors, (44) Word has length 156 [2023-02-18 16:32:39,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:32:39,875 INFO L225 Difference]: With dead ends: 3013 [2023-02-18 16:32:39,875 INFO L226 Difference]: Without dead ends: 3011 [2023-02-18 16:32:39,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 271 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=2171, Invalid=8541, Unknown=0, NotChecked=0, Total=10712 [2023-02-18 16:32:39,877 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 347 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 2999 mSolverCounterSat, 655 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 3664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 2999 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:32:39,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 595 Invalid, 3664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 2999 Invalid, 10 Unknown, 0 Unchecked, 45.6s Time] [2023-02-18 16:32:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states.