./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f73abe50a425917d2dd4066f1792742190b4ae9dbdaa6d6431079d0ef1d76a5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 02:56:02,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 02:56:02,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 02:56:02,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 02:56:02,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 02:56:02,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 02:56:02,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 02:56:02,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 02:56:02,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 02:56:02,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 02:56:02,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 02:56:02,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 02:56:02,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 02:56:02,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 02:56:02,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 02:56:02,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 02:56:02,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 02:56:02,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 02:56:02,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 02:56:02,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 02:56:02,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 02:56:02,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 02:56:02,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 02:56:02,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 02:56:02,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 02:56:02,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 02:56:02,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 02:56:02,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 02:56:02,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 02:56:02,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 02:56:02,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 02:56:02,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 02:56:02,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 02:56:02,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 02:56:02,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 02:56:02,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 02:56:02,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 02:56:02,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 02:56:02,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 02:56:02,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 02:56:02,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 02:56:02,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 02:56:02,650 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 02:56:02,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 02:56:02,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 02:56:02,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 02:56:02,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 02:56:02,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 02:56:02,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 02:56:02,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 02:56:02,653 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 02:56:02,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 02:56:02,654 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 02:56:02,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 02:56:02,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 02:56:02,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 02:56:02,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 02:56:02,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 02:56:02,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 02:56:02,655 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 02:56:02,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 02:56:02,655 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 02:56:02,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 02:56:02,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 02:56:02,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 02:56:02,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 02:56:02,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:56:02,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 02:56:02,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 02:56:02,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 02:56:02,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 02:56:02,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 02:56:02,657 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 02:56:02,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 02:56:02,657 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 02:56:02,657 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 02:56:02,657 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 02:56:02,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f73abe50a425917d2dd4066f1792742190b4ae9dbdaa6d6431079d0ef1d76a5 [2023-02-18 02:56:02,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 02:56:02,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 02:56:02,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 02:56:02,890 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 02:56:02,890 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 02:56:02,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c [2023-02-18 02:56:03,838 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 02:56:03,998 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 02:56:04,004 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c [2023-02-18 02:56:04,009 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3652efe59/6ebc8aa0335c4fa3ae6a6984e8f50e87/FLAGb143ef56f [2023-02-18 02:56:04,028 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3652efe59/6ebc8aa0335c4fa3ae6a6984e8f50e87 [2023-02-18 02:56:04,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 02:56:04,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 02:56:04,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 02:56:04,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 02:56:04,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 02:56:04,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d253c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04, skipping insertion in model container [2023-02-18 02:56:04,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 02:56:04,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 02:56:04,170 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c[537,550] [2023-02-18 02:56:04,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:56:04,201 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 02:56:04,210 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound100.c[537,550] [2023-02-18 02:56:04,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:56:04,232 INFO L208 MainTranslator]: Completed translation [2023-02-18 02:56:04,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04 WrapperNode [2023-02-18 02:56:04,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 02:56:04,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 02:56:04,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 02:56:04,234 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 02:56:04,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,253 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2023-02-18 02:56:04,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 02:56:04,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 02:56:04,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 02:56:04,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 02:56:04,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,278 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 02:56:04,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 02:56:04,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 02:56:04,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 02:56:04,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04" (1/1) ... [2023-02-18 02:56:04,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:56:04,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:56:04,302 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 02:56:04,307 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 02:56:04,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 02:56:04,325 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 02:56:04,325 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 02:56:04,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 02:56:04,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 02:56:04,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 02:56:04,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 02:56:04,326 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 02:56:04,364 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 02:56:04,365 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 02:56:04,458 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 02:56:04,462 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 02:56:04,462 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 02:56:04,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:56:04 BoogieIcfgContainer [2023-02-18 02:56:04,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 02:56:04,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 02:56:04,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 02:56:04,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 02:56:04,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 02:56:04" (1/3) ... [2023-02-18 02:56:04,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138413e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:56:04, skipping insertion in model container [2023-02-18 02:56:04,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:04" (2/3) ... [2023-02-18 02:56:04,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138413e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:56:04, skipping insertion in model container [2023-02-18 02:56:04,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:56:04" (3/3) ... [2023-02-18 02:56:04,469 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound100.c [2023-02-18 02:56:04,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 02:56:04,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 02:56:04,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 02:56:04,515 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;@12d46a86, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 02:56:04,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 02:56:04,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 02:56:04,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 02:56:04,522 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:04,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:04,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:04,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:04,526 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2023-02-18 02:56:04,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:04,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996434510] [2023-02-18 02:56:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:04,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:04,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 02:56:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:04,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 02:56:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 02:56:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 02:56:04,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:04,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996434510] [2023-02-18 02:56:04,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996434510] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:56:04,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:56:04,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 02:56:04,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292573506] [2023-02-18 02:56:04,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:56:04,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 02:56:04,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:04,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 02:56:04,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 02:56:04,661 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 02:56:04,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:04,676 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2023-02-18 02:56:04,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 02:56:04,677 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-02-18 02:56:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:04,682 INFO L225 Difference]: With dead ends: 63 [2023-02-18 02:56:04,682 INFO L226 Difference]: Without dead ends: 29 [2023-02-18 02:56:04,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 02:56:04,686 INFO L413 NwaCegarLoop]: 43 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, 43 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 02:56:04,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:56:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-18 02:56:04,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-18 02:56:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 02:56:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-02-18 02:56:04,711 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2023-02-18 02:56:04,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:04,711 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-02-18 02:56:04,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 02:56:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-02-18 02:56:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 02:56:04,713 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:04,713 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:04,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 02:56:04,715 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:04,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2023-02-18 02:56:04,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:04,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594453399] [2023-02-18 02:56:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:04,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:04,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 02:56:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:04,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 02:56:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:04,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 02:56:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 02:56:04,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594453399] [2023-02-18 02:56:04,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594453399] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:56:04,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:56:04,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 02:56:04,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073479098] [2023-02-18 02:56:04,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:56:04,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 02:56:04,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 02:56:04,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 02:56:04,984 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 02:56:05,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:05,049 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-18 02:56:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:56:05,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-02-18 02:56:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:05,051 INFO L225 Difference]: With dead ends: 42 [2023-02-18 02:56:05,051 INFO L226 Difference]: Without dead ends: 40 [2023-02-18 02:56:05,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 02:56:05,052 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:56:05,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:56:05,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-18 02:56:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-18 02:56:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 02:56:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-18 02:56:05,066 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2023-02-18 02:56:05,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:05,067 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-18 02:56:05,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 02:56:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-18 02:56:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 02:56:05,069 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:05,070 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:05,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 02:56:05,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2023-02-18 02:56:05,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:05,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443266910] [2023-02-18 02:56:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:05,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:05,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 02:56:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:05,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 02:56:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:05,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 02:56:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:05,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 02:56:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 02:56:05,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:05,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443266910] [2023-02-18 02:56:05,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443266910] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:56:05,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:56:05,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 02:56:05,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827962946] [2023-02-18 02:56:05,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:56:05,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 02:56:05,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:05,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 02:56:05,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 02:56:05,372 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:56:05,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:05,455 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-02-18 02:56:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:56:05,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-02-18 02:56:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:05,456 INFO L225 Difference]: With dead ends: 46 [2023-02-18 02:56:05,457 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 02:56:05,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 02:56:05,458 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:56:05,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:56:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 02:56:05,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-02-18 02:56:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 02:56:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-02-18 02:56:05,464 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2023-02-18 02:56:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:05,465 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-02-18 02:56:05,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:56:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-02-18 02:56:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 02:56:05,466 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:05,466 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:05,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 02:56:05,466 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2023-02-18 02:56:05,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:05,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238962887] [2023-02-18 02:56:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:05,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:05,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:56:05,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586024744] [2023-02-18 02:56:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:05,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:05,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:56:05,477 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 02:56:05,495 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 02:56:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:05,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 02:56:05,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:56:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 02:56:05,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:56:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 02:56:05,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:05,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238962887] [2023-02-18 02:56:05,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:56:05,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586024744] [2023-02-18 02:56:05,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586024744] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:56:05,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:56:05,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-18 02:56:05,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034323817] [2023-02-18 02:56:05,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:56:05,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 02:56:05,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 02:56:05,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-18 02:56:05,705 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-18 02:56:07,857 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 02:56:09,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:56:12,060 WARN L539 Checker$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 02:56:12,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:12,298 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2023-02-18 02:56:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 02:56:12,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 34 [2023-02-18 02:56:12,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:12,300 INFO L225 Difference]: With dead ends: 76 [2023-02-18 02:56:12,301 INFO L226 Difference]: Without dead ends: 62 [2023-02-18 02:56:12,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-18 02:56:12,302 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-02-18 02:56:12,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 164 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2023-02-18 02:56:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-18 02:56:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-02-18 02:56:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 38 states have internal predecessors, (39), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 02:56:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-02-18 02:56:12,334 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 34 [2023-02-18 02:56:12,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:12,334 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-02-18 02:56:12,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-18 02:56:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-02-18 02:56:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 02:56:12,338 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:12,339 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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 02:56:12,346 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 02:56:12,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:12,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2023-02-18 02:56:12,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:12,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758301850] [2023-02-18 02:56:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:12,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:12,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:56:12,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612156466] [2023-02-18 02:56:12,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:12,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:12,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:56:12,567 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 02:56:12,581 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 02:56:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:12,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 02:56:12,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:56:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 02:56:12,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:56:12,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:12,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758301850] [2023-02-18 02:56:12,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:56:12,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612156466] [2023-02-18 02:56:12,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612156466] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:56:12,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:56:12,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 02:56:12,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125411602] [2023-02-18 02:56:12,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:56:12,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 02:56:12,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:12,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 02:56:12,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 02:56:12,737 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 02:56:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:13,404 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2023-02-18 02:56:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 02:56:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2023-02-18 02:56:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:13,405 INFO L225 Difference]: With dead ends: 72 [2023-02-18 02:56:13,405 INFO L226 Difference]: Without dead ends: 61 [2023-02-18 02:56:13,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-18 02:56:13,406 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 02:56:13,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 147 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 02:56:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-18 02:56:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-02-18 02:56:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 02:56:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-02-18 02:56:13,417 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 41 [2023-02-18 02:56:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:13,418 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-02-18 02:56:13,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 02:56:13,419 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-02-18 02:56:13,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-18 02:56:13,420 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:13,420 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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, 1] [2023-02-18 02:56:13,427 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 02:56:13,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:13,625 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:13,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:13,626 INFO L85 PathProgramCache]: Analyzing trace with hash -421337323, now seen corresponding path program 1 times [2023-02-18 02:56:13,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:13,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272289170] [2023-02-18 02:56:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:13,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:13,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:56:13,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411741281] [2023-02-18 02:56:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:13,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:13,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:56:13,653 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 02:56:13,654 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 02:56:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 02:56:13,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:56:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 02:56:13,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:56:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-18 02:56:15,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:15,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272289170] [2023-02-18 02:56:15,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:56:15,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411741281] [2023-02-18 02:56:15,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411741281] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:56:15,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:56:15,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-02-18 02:56:15,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672335411] [2023-02-18 02:56:15,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:56:15,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 02:56:15,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:15,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 02:56:15,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-02-18 02:56:15,084 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-18 02:56:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:17,445 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2023-02-18 02:56:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 02:56:17,446 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 58 [2023-02-18 02:56:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:17,447 INFO L225 Difference]: With dead ends: 76 [2023-02-18 02:56:17,447 INFO L226 Difference]: Without dead ends: 74 [2023-02-18 02:56:17,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-02-18 02:56:17,447 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-18 02:56:17,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 106 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-18 02:56:17,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-18 02:56:17,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2023-02-18 02:56:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 47 states have internal predecessors, (48), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 02:56:17,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2023-02-18 02:56:17,459 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 58 [2023-02-18 02:56:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:17,460 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2023-02-18 02:56:17,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-18 02:56:17,460 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2023-02-18 02:56:17,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 02:56:17,461 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:17,461 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:17,469 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 02:56:17,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:17,668 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:17,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1609951834, now seen corresponding path program 1 times [2023-02-18 02:56:17,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:17,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139430873] [2023-02-18 02:56:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:17,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:17,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:56:17,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44115888] [2023-02-18 02:56:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:17,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:17,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:56:17,703 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 02:56:17,704 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 02:56:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:18,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 02:56:18,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:56:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-18 02:56:18,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:56:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-02-18 02:56:19,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:19,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139430873] [2023-02-18 02:56:19,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:56:19,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44115888] [2023-02-18 02:56:19,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44115888] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:56:19,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:56:19,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 19 [2023-02-18 02:56:19,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078735596] [2023-02-18 02:56:19,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:56:19,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 02:56:19,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:19,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 02:56:19,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-02-18 02:56:19,232 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 02:56:24,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:56:26,998 WARN L539 Checker$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 02:56:31,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:56:35,160 WARN L539 Checker$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 02:56:37,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:56:39,897 WARN L539 Checker$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 02:56:41,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:56:44,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:56:46,742 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 02:56:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:46,744 INFO L93 Difference]: Finished difference Result 130 states and 178 transitions. [2023-02-18 02:56:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 02:56:46,745 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) Word has length 68 [2023-02-18 02:56:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:46,746 INFO L225 Difference]: With dead ends: 130 [2023-02-18 02:56:46,746 INFO L226 Difference]: Without dead ends: 118 [2023-02-18 02:56:46,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2023-02-18 02:56:46,747 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 73 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 91 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:56:46,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 222 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 827 Invalid, 8 Unknown, 0 Unchecked, 27.0s Time] [2023-02-18 02:56:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-18 02:56:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2023-02-18 02:56:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 53 states have (on average 1.169811320754717) internal successors, (62), 59 states have internal predecessors, (62), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-18 02:56:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 123 transitions. [2023-02-18 02:56:46,786 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 123 transitions. Word has length 68 [2023-02-18 02:56:46,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:46,788 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 123 transitions. [2023-02-18 02:56:46,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 02:56:46,788 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 123 transitions. [2023-02-18 02:56:46,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 02:56:46,792 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:46,793 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:46,813 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 02:56:47,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:47,013 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:47,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2023-02-18 02:56:47,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:47,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545717688] [2023-02-18 02:56:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:47,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:47,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:56:47,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478832550] [2023-02-18 02:56:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:47,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:47,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:56:47,026 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 02:56:47,027 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 02:56:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:48,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 02:56:48,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:56:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-18 02:56:49,321 INFO L328 TraceCheckSpWp]: Computing backward predicates...