./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound10.i --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/divbin2_valuebound10.i -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 5d6ad2c11d3a75b8845224ed23d407062e615cc5bd2b5ad3e6646436a3e13805 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 01:37:23,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 01:37:23,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 01:37:24,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 01:37:24,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 01:37:24,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 01:37:24,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 01:37:24,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 01:37:24,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 01:37:24,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 01:37:24,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 01:37:24,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 01:37:24,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 01:37:24,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 01:37:24,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 01:37:24,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 01:37:24,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 01:37:24,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 01:37:24,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 01:37:24,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 01:37:24,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 01:37:24,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 01:37:24,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 01:37:24,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 01:37:24,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 01:37:24,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 01:37:24,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 01:37:24,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 01:37:24,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 01:37:24,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 01:37:24,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 01:37:24,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 01:37:24,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 01:37:24,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 01:37:24,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 01:37:24,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 01:37:24,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 01:37:24,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 01:37:24,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 01:37:24,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 01:37:24,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 01:37:24,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 01:37:24,090 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 01:37:24,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 01:37:24,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 01:37:24,090 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 01:37:24,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 01:37:24,091 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 01:37:24,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 01:37:24,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 01:37:24,092 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 01:37:24,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 01:37:24,092 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 01:37:24,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 01:37:24,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 01:37:24,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 01:37:24,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 01:37:24,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 01:37:24,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 01:37:24,093 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 01:37:24,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 01:37:24,094 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 01:37:24,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 01:37:24,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 01:37:24,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 01:37:24,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 01:37:24,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 01:37:24,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 01:37:24,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 01:37:24,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 01:37:24,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 01:37:24,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 01:37:24,095 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 01:37:24,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 01:37:24,096 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 01:37:24,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 01:37:24,096 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 01:37:24,096 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d6ad2c11d3a75b8845224ed23d407062e615cc5bd2b5ad3e6646436a3e13805 [2023-02-18 01:37:24,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 01:37:24,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 01:37:24,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 01:37:24,292 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 01:37:24,293 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 01:37:24,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound10.i [2023-02-18 01:37:25,200 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 01:37:25,363 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 01:37:25,364 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound10.i [2023-02-18 01:37:25,368 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1431d47/c0b31e4c4e414d4bbc12fe5738667014/FLAG687909f28 [2023-02-18 01:37:25,382 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1431d47/c0b31e4c4e414d4bbc12fe5738667014 [2023-02-18 01:37:25,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 01:37:25,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 01:37:25,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 01:37:25,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 01:37:25,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 01:37:25,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d3f24b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25, skipping insertion in model container [2023-02-18 01:37:25,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 01:37:25,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 01:37:25,499 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/divbin2_valuebound10.i[951,964] [2023-02-18 01:37:25,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 01:37:25,512 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 01:37:25,520 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/divbin2_valuebound10.i[951,964] [2023-02-18 01:37:25,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 01:37:25,531 INFO L208 MainTranslator]: Completed translation [2023-02-18 01:37:25,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25 WrapperNode [2023-02-18 01:37:25,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 01:37:25,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 01:37:25,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 01:37:25,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 01:37:25,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,550 INFO L138 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2023-02-18 01:37:25,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 01:37:25,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 01:37:25,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 01:37:25,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 01:37:25,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,568 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 01:37:25,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 01:37:25,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 01:37:25,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 01:37:25,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25" (1/1) ... [2023-02-18 01:37:25,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 01:37:25,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:25,592 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 01:37:25,594 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 01:37:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 01:37:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 01:37:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 01:37:25,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 01:37:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 01:37:25,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 01:37:25,653 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 01:37:25,654 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 01:37:25,735 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 01:37:25,739 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 01:37:25,739 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 01:37:25,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:37:25 BoogieIcfgContainer [2023-02-18 01:37:25,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 01:37:25,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 01:37:25,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 01:37:25,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 01:37:25,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 01:37:25" (1/3) ... [2023-02-18 01:37:25,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3179b5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:37:25, skipping insertion in model container [2023-02-18 01:37:25,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:25" (2/3) ... [2023-02-18 01:37:25,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3179b5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:37:25, skipping insertion in model container [2023-02-18 01:37:25,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:37:25" (3/3) ... [2023-02-18 01:37:25,745 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound10.i [2023-02-18 01:37:25,756 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 01:37:25,756 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 01:37:25,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 01:37:25,788 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;@209cfdc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 01:37:25,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 01:37:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:37:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 01:37:25,795 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:25,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:25,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:25,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1105477780, now seen corresponding path program 1 times [2023-02-18 01:37:25,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:25,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690825718] [2023-02-18 01:37:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:25,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:25,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:25,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690825718] [2023-02-18 01:37:25,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 01:37:25,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408743710] [2023-02-18 01:37:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:25,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:25,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:25,926 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 01:37:25,928 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 01:37:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:25,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 01:37:25,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:26,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:37:26,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408743710] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:37:26,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:37:26,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 01:37:26,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563017516] [2023-02-18 01:37:26,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:37:26,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 01:37:26,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:26,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 01:37:26,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 01:37:26,065 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 01:37:26,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:26,084 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2023-02-18 01:37:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 01:37:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 01:37:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:26,091 INFO L225 Difference]: With dead ends: 39 [2023-02-18 01:37:26,091 INFO L226 Difference]: Without dead ends: 17 [2023-02-18 01:37:26,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 01:37:26,097 INFO L413 NwaCegarLoop]: 24 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, 24 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 01:37:26,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:37:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-18 01:37:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-18 01:37:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 01:37:26,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-02-18 01:37:26,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2023-02-18 01:37:26,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:26,124 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-02-18 01:37:26,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 01:37:26,126 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-02-18 01:37:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 01:37:26,126 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:26,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:26,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 01:37:26,331 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 01:37:26,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:26,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2095969935, now seen corresponding path program 1 times [2023-02-18 01:37:26,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:26,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486341677] [2023-02-18 01:37:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:26,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:26,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:26,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585896109] [2023-02-18 01:37:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:26,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:26,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:26,353 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 01:37:26,355 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 01:37:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:26,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 01:37:26,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:26,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:37:26,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486341677] [2023-02-18 01:37:26,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585896109] [2023-02-18 01:37:26,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585896109] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:37:26,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:37:26,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 01:37:26,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773111931] [2023-02-18 01:37:26,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:37:26,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 01:37:26,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 01:37:26,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-18 01:37:26,511 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 01:37:26,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:26,587 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2023-02-18 01:37:26,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 01:37:26,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 01:37:26,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:26,588 INFO L225 Difference]: With dead ends: 29 [2023-02-18 01:37:26,588 INFO L226 Difference]: Without dead ends: 26 [2023-02-18 01:37:26,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-18 01:37:26,589 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:26,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 44 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:37:26,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-18 01:37:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-18 01:37:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:37:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-02-18 01:37:26,595 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11 [2023-02-18 01:37:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:26,596 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-02-18 01:37:26,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 01:37:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-02-18 01:37:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 01:37:26,596 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:26,596 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:26,603 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 01:37:26,801 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 01:37:26,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 975547596, now seen corresponding path program 1 times [2023-02-18 01:37:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:26,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284234963] [2023-02-18 01:37:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:26,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:26,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:26,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691464411] [2023-02-18 01:37:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:26,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:26,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:26,823 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 01:37:26,825 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 01:37:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:26,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 01:37:26,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:26,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:37:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:27,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:27,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284234963] [2023-02-18 01:37:27,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:27,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691464411] [2023-02-18 01:37:27,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691464411] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 01:37:27,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:37:27,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-02-18 01:37:27,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676927683] [2023-02-18 01:37:27,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:37:27,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 01:37:27,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 01:37:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-02-18 01:37:27,076 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 01:37:29,153 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 [1] [2023-02-18 01:37:31,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-18 01:37:33,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-18 01:37:35,236 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 [1] [2023-02-18 01:37:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:35,258 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2023-02-18 01:37:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 01:37:35,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 01:37:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:35,261 INFO L225 Difference]: With dead ends: 40 [2023-02-18 01:37:35,261 INFO L226 Difference]: Without dead ends: 38 [2023-02-18 01:37:35,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-02-18 01:37:35,261 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:35,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 52 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 4 Unknown, 0 Unchecked, 8.2s Time] [2023-02-18 01:37:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-18 01:37:35,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2023-02-18 01:37:35,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 4 states have call successors, (4), 3 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 01:37:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-18 01:37:35,274 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 13 [2023-02-18 01:37:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:35,274 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-18 01:37:35,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 01:37:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-18 01:37:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 01:37:35,275 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:35,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:35,283 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 01:37:35,480 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 01:37:35,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:35,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1791376988, now seen corresponding path program 1 times [2023-02-18 01:37:35,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:35,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077840206] [2023-02-18 01:37:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:35,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:35,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:35,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274259969] [2023-02-18 01:37:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:35,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:35,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:35,491 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 01:37:35,496 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 01:37:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:35,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 01:37:35,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:35,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:37:35,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:35,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077840206] [2023-02-18 01:37:35,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:35,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274259969] [2023-02-18 01:37:35,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274259969] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:37:35,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:37:35,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 01:37:35,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417907345] [2023-02-18 01:37:35,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:37:35,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 01:37:35,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:35,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 01:37:35,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 01:37:35,529 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 01:37:35,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:35,545 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-02-18 01:37:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 01:37:35,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-02-18 01:37:35,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:35,547 INFO L225 Difference]: With dead ends: 43 [2023-02-18 01:37:35,547 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 01:37:35,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 01:37:35,548 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:35,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:37:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 01:37:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-18 01:37:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 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 01:37:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-02-18 01:37:35,553 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2023-02-18 01:37:35,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:35,554 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-02-18 01:37:35,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 01:37:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-02-18 01:37:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 01:37:35,554 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:35,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:35,561 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 01:37:35,759 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 01:37:35,760 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:35,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1508058588, now seen corresponding path program 1 times [2023-02-18 01:37:35,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:35,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912530172] [2023-02-18 01:37:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:35,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:35,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:35,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893489641] [2023-02-18 01:37:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:35,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:35,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:35,777 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 01:37:35,778 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 01:37:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 01:37:35,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 01:37:35,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:37:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 01:37:35,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:35,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912530172] [2023-02-18 01:37:35,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:35,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893489641] [2023-02-18 01:37:35,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893489641] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:37:35,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:37:35,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-02-18 01:37:35,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958415016] [2023-02-18 01:37:35,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:37:35,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 01:37:35,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:35,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 01:37:35,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-18 01:37:35,929 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 01:37:36,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:36,302 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-02-18 01:37:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 01:37:36,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-02-18 01:37:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:36,303 INFO L225 Difference]: With dead ends: 31 [2023-02-18 01:37:36,303 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 01:37:36,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-18 01:37:36,304 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:36,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 01:37:36,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 01:37:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-18 01:37:36,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:37:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-02-18 01:37:36,308 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2023-02-18 01:37:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:36,309 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-02-18 01:37:36,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 01:37:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-02-18 01:37:36,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 01:37:36,309 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:36,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:36,314 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 01:37:36,514 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 01:37:36,514 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash -800204289, now seen corresponding path program 1 times [2023-02-18 01:37:36,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:36,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343326899] [2023-02-18 01:37:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:36,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:36,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:36,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352055048] [2023-02-18 01:37:36,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:36,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:36,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:36,542 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 01:37:36,561 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 01:37:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:36,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 01:37:36,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:36,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:37:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:37,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:37,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343326899] [2023-02-18 01:37:37,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:37,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352055048] [2023-02-18 01:37:37,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352055048] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:37:37,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:37:37,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-02-18 01:37:37,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108739689] [2023-02-18 01:37:37,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:37:37,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 01:37:37,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:37,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 01:37:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-02-18 01:37:37,236 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:37:40,510 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 01:37:42,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:37:47,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:37:52,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:37:54,010 WARN L539 Checker$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 01:38:03,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:38:05,230 WARN L539 Checker$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 01:38:07,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:38:10,043 WARN L539 Checker$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 01:38:12,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:38:14,049 WARN L539 Checker$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 01:38:16,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:38:18,918 WARN L539 Checker$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 01:38:18,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:38:18,918 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2023-02-18 01:38:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 01:38:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-02-18 01:38:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:38:18,922 INFO L225 Difference]: With dead ends: 67 [2023-02-18 01:38:18,922 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 01:38:18,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=197, Invalid=671, Unknown=2, NotChecked=0, Total=870 [2023-02-18 01:38:18,923 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 76 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 42 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:38:18,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 125 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 233 Invalid, 9 Unknown, 0 Unchecked, 31.2s Time] [2023-02-18 01:38:18,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 01:38:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2023-02-18 01:38:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 52 states have internal predecessors, (57), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 5 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 01:38:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2023-02-18 01:38:18,945 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 21 [2023-02-18 01:38:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:38:18,945 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2023-02-18 01:38:18,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:38:18,946 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2023-02-18 01:38:18,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 01:38:18,947 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:38:18,947 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:38:18,953 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 01:38:19,151 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 01:38:19,152 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:38:19,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:38:19,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2122375824, now seen corresponding path program 2 times [2023-02-18 01:38:19,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:38:19,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81908716] [2023-02-18 01:38:19,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:38:19,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:38:19,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:38:19,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420517855] [2023-02-18 01:38:19,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 01:38:19,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:38:19,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:38:19,163 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 01:38:19,181 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 01:38:19,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 01:38:19,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:38:19,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 01:38:19,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:38:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:38:19,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:38:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:38:22,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:38:22,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81908716] [2023-02-18 01:38:22,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:38:22,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420517855] [2023-02-18 01:38:22,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420517855] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:38:22,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:38:22,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2023-02-18 01:38:22,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673791511] [2023-02-18 01:38:22,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:38:22,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 01:38:22,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:38:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 01:38:22,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-02-18 01:38:22,790 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:38:37,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:38:54,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:38:56,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:38:57,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:39:00,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:39:02,733 WARN L539 Checker$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 01:39:04,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:39:06,747 WARN L539 Checker$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 01:39:08,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:39:10,771 WARN L539 Checker$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 01:39:12,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:39:17,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:39:18,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:39:21,865 WARN L539 Checker$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 01:39:23,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:39:25,876 WARN L539 Checker$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 01:39:28,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:39:30,775 WARN L539 Checker$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 01:39:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:39:32,974 INFO L93 Difference]: Finished difference Result 154 states and 200 transitions. [2023-02-18 01:39:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 01:39:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-18 01:39:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:39:32,976 INFO L225 Difference]: With dead ends: 154 [2023-02-18 01:39:32,976 INFO L226 Difference]: Without dead ends: 136 [2023-02-18 01:39:32,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=307, Invalid=1022, Unknown=3, NotChecked=0, Total=1332 [2023-02-18 01:39:32,977 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 138 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 124 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.3s IncrementalHoareTripleChecker+Time [2023-02-18 01:39:32,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 184 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 447 Invalid, 13 Unknown, 0 Unchecked, 49.3s Time] [2023-02-18 01:39:32,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-18 01:39:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 108. [2023-02-18 01:39:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 87 states have internal predecessors, (99), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 14 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 01:39:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2023-02-18 01:39:33,013 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 27 [2023-02-18 01:39:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:39:33,013 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2023-02-18 01:39:33,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:39:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2023-02-18 01:39:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 01:39:33,015 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:39:33,015 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:39:33,023 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 01:39:33,222 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 01:39:33,222 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:39:33,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:39:33,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1335567410, now seen corresponding path program 3 times [2023-02-18 01:39:33,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:39:33,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924712221] [2023-02-18 01:39:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:39:33,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:39:33,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:39:33,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965266135] [2023-02-18 01:39:33,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 01:39:33,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:39:33,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:39:33,231 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 01:39:33,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process