./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.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_unwindbound5.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 e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 01:37:12,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 01:37:12,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 01:37:12,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 01:37:12,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 01:37:12,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 01:37:12,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 01:37:12,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 01:37:12,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 01:37:12,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 01:37:12,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 01:37:12,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 01:37:12,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 01:37:12,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 01:37:12,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 01:37:12,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 01:37:12,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 01:37:12,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 01:37:12,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 01:37:12,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 01:37:12,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 01:37:12,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 01:37:12,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 01:37:12,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 01:37:12,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 01:37:12,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 01:37:12,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 01:37:12,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 01:37:12,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 01:37:12,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 01:37:12,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 01:37:12,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 01:37:12,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 01:37:12,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 01:37:12,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 01:37:12,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 01:37:12,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 01:37:12,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 01:37:12,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 01:37:12,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 01:37:12,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 01:37:12,117 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 01:37:12,129 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 01:37:12,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 01:37:12,131 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 01:37:12,131 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 01:37:12,132 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 01:37:12,132 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 01:37:12,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 01:37:12,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 01:37:12,133 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 01:37:12,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 01:37:12,134 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 01:37:12,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 01:37:12,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 01:37:12,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 01:37:12,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 01:37:12,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 01:37:12,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 01:37:12,135 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 01:37:12,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 01:37:12,135 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 01:37:12,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 01:37:12,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 01:37:12,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 01:37:12,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 01:37:12,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 01:37:12,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 01:37:12,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 01:37:12,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 01:37:12,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 01:37:12,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 01:37:12,137 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 01:37:12,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 01:37:12,137 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 01:37:12,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 01:37:12,138 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 01:37:12,138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2 [2023-02-18 01:37:12,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 01:37:12,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 01:37:12,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 01:37:12,337 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 01:37:12,337 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 01:37:12,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2023-02-18 01:37:13,255 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 01:37:13,371 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 01:37:13,372 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2023-02-18 01:37:13,375 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ba05637/598dc7c3420d4a5ab10135f3d2868b9a/FLAG0a1664aa4 [2023-02-18 01:37:13,384 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ba05637/598dc7c3420d4a5ab10135f3d2868b9a [2023-02-18 01:37:13,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 01:37:13,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 01:37:13,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 01:37:13,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 01:37:13,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 01:37:13,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32aeb023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13, skipping insertion in model container [2023-02-18 01:37:13,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 01:37:13,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 01:37:13,495 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_unwindbound5.i[951,964] [2023-02-18 01:37:13,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 01:37:13,513 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 01:37:13,525 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_unwindbound5.i[951,964] [2023-02-18 01:37:13,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 01:37:13,537 INFO L208 MainTranslator]: Completed translation [2023-02-18 01:37:13,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13 WrapperNode [2023-02-18 01:37:13,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 01:37:13,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 01:37:13,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 01:37:13,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 01:37:13,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,547 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,561 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2023-02-18 01:37:13,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 01:37:13,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 01:37:13,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 01:37:13,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 01:37:13,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,588 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 01:37:13,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 01:37:13,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 01:37:13,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 01:37:13,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13" (1/1) ... [2023-02-18 01:37:13,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 01:37:13,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:13,615 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 01:37:13,620 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 01:37:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 01:37:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 01:37:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 01:37:13,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 01:37:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 01:37:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 01:37:13,678 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 01:37:13,679 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 01:37:13,832 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 01:37:13,835 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 01:37:13,836 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 01:37:13,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:37:13 BoogieIcfgContainer [2023-02-18 01:37:13,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 01:37:13,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 01:37:13,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 01:37:13,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 01:37:13,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 01:37:13" (1/3) ... [2023-02-18 01:37:13,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735b700f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:37:13, skipping insertion in model container [2023-02-18 01:37:13,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:37:13" (2/3) ... [2023-02-18 01:37:13,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735b700f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:37:13, skipping insertion in model container [2023-02-18 01:37:13,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:37:13" (3/3) ... [2023-02-18 01:37:13,853 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.i [2023-02-18 01:37:13,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 01:37:13,875 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 01:37:13,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 01:37:13,920 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;@15a4da9a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 01:37:13,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 01:37:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 01:37:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 01:37:13,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:13,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:13,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:13,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:13,930 INFO L85 PathProgramCache]: Analyzing trace with hash 553144752, now seen corresponding path program 1 times [2023-02-18 01:37:13,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:13,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310607301] [2023-02-18 01:37:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:13,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:14,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:14,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310607301] [2023-02-18 01:37:14,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 01:37:14,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756760337] [2023-02-18 01:37:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:14,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:14,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:14,022 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 01:37:14,024 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 01:37:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:14,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 01:37:14,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:14,088 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 01:37:14,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:37:14,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756760337] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:37:14,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:37:14,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 01:37:14,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373636124] [2023-02-18 01:37:14,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:37:14,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 01:37:14,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 01:37:14,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 01:37:14,118 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 01:37:14,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:14,133 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2023-02-18 01:37:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 01:37:14,135 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2023-02-18 01:37:14,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:14,139 INFO L225 Difference]: With dead ends: 37 [2023-02-18 01:37:14,139 INFO L226 Difference]: Without dead ends: 17 [2023-02-18 01:37:14,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 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 01:37:14,144 INFO L413 NwaCegarLoop]: 26 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, 26 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 01:37:14,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:37:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-18 01:37:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-18 01:37:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 01:37:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-02-18 01:37:14,166 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 8 [2023-02-18 01:37:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:14,167 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-02-18 01:37:14,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 01:37:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-02-18 01:37:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 01:37:14,167 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:14,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:14,172 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 01:37:14,372 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 01:37:14,373 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:14,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:14,373 INFO L85 PathProgramCache]: Analyzing trace with hash -803059042, now seen corresponding path program 1 times [2023-02-18 01:37:14,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:14,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159204595] [2023-02-18 01:37:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:14,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:14,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:14,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159204595] [2023-02-18 01:37:14,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 01:37:14,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089132087] [2023-02-18 01:37:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:14,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:14,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:14,402 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 01:37:14,406 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 01:37:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 01:37:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:14,468 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 01:37:14,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:37:14,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089132087] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:37:14,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:37:14,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 01:37:14,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002422288] [2023-02-18 01:37:14,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:37:14,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 01:37:14,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 01:37:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 01:37:14,470 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 01:37:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:14,481 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2023-02-18 01:37:14,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 01:37:14,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 01:37:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:14,482 INFO L225 Difference]: With dead ends: 31 [2023-02-18 01:37:14,482 INFO L226 Difference]: Without dead ends: 19 [2023-02-18 01:37:14,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 01:37:14,483 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:14,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:37:14,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-18 01:37:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-18 01:37:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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 01:37:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-02-18 01:37:14,487 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2023-02-18 01:37:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:14,487 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-02-18 01:37:14,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 01:37:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-02-18 01:37:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 01:37:14,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:14,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:14,494 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 01:37:14,692 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 01:37:14,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:14,693 INFO L85 PathProgramCache]: Analyzing trace with hash 549278495, now seen corresponding path program 1 times [2023-02-18 01:37:14,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:14,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529034774] [2023-02-18 01:37:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:14,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:14,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:14,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032247434] [2023-02-18 01:37:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:14,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:14,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:14,706 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 01:37:14,707 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 01:37:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:14,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 01:37:14,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:14,756 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 01:37:14,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:37:14,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:14,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529034774] [2023-02-18 01:37:14,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:14,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032247434] [2023-02-18 01:37:14,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032247434] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:37:14,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:37:14,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 01:37:14,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961916172] [2023-02-18 01:37:14,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:37:14,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 01:37:14,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:14,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 01:37:14,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 01:37:14,759 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 01:37:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:14,774 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-02-18 01:37:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 01:37:14,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 01:37:14,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:14,775 INFO L225 Difference]: With dead ends: 30 [2023-02-18 01:37:14,776 INFO L226 Difference]: Without dead ends: 23 [2023-02-18 01:37:14,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 01:37:14,777 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:14,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:37:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-18 01:37:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-02-18 01:37:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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 01:37:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-02-18 01:37:14,785 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2023-02-18 01:37:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:14,785 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-02-18 01:37:14,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 01:37:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-02-18 01:37:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 01:37:14,786 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:14,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:14,805 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 01:37:14,987 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 01:37:14,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash 551065955, now seen corresponding path program 1 times [2023-02-18 01:37:14,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:14,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743325521] [2023-02-18 01:37:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:14,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:14,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:14,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816330706] [2023-02-18 01:37:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:14,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:14,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:14,998 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 01:37:15,000 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 01:37:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 01:37:15,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:15,068 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 01:37:15,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:37:15,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743325521] [2023-02-18 01:37:15,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816330706] [2023-02-18 01:37:15,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816330706] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:37:15,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:37:15,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 01:37:15,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264778271] [2023-02-18 01:37:15,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:37:15,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 01:37:15,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:15,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 01:37:15,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 01:37:15,071 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 01:37:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:15,130 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-02-18 01:37:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 01:37:15,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 01:37:15,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:15,131 INFO L225 Difference]: With dead ends: 31 [2023-02-18 01:37:15,132 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 01:37:15,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 01:37:15,133 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:15,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 59 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:37:15,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 01:37:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-18 01:37:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 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 01:37:15,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-02-18 01:37:15,138 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2023-02-18 01:37:15,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:15,138 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-02-18 01:37:15,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 01:37:15,138 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-02-18 01:37:15,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 01:37:15,139 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:15,139 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:15,145 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 01:37:15,343 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 01:37:15,343 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:15,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1647533572, now seen corresponding path program 1 times [2023-02-18 01:37:15,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:15,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875654375] [2023-02-18 01:37:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:15,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:15,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:15,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794216024] [2023-02-18 01:37:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:15,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:15,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:15,353 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 01:37:15,355 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 01:37:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:15,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 01:37:15,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:15,398 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 01:37:15,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:37:15,412 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 01:37:15,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875654375] [2023-02-18 01:37:15,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:15,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794216024] [2023-02-18 01:37:15,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794216024] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:37:15,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:37:15,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-02-18 01:37:15,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786318600] [2023-02-18 01:37:15,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:37:15,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 01:37:15,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:15,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 01:37:15,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 01:37:15,422 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 01:37:15,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:15,466 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2023-02-18 01:37:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 01:37:15,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 01:37:15,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:15,467 INFO L225 Difference]: With dead ends: 62 [2023-02-18 01:37:15,467 INFO L226 Difference]: Without dead ends: 50 [2023-02-18 01:37:15,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-18 01:37:15,468 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:15,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 107 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:37:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-18 01:37:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2023-02-18 01:37:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3) internal successors, (39), 31 states have internal predecessors, (39), 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 01:37:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-02-18 01:37:15,476 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 13 [2023-02-18 01:37:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:15,477 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-02-18 01:37:15,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 01:37:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-02-18 01:37:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 01:37:15,478 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:15,478 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:15,487 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 01:37:15,682 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 01:37:15,682 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:15,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:15,683 INFO L85 PathProgramCache]: Analyzing trace with hash -791761799, now seen corresponding path program 1 times [2023-02-18 01:37:15,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:15,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090448627] [2023-02-18 01:37:15,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:15,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:15,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:15,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270261161] [2023-02-18 01:37:15,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:15,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:15,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:15,710 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 01:37:15,712 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 01:37:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:15,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 01:37:15,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:15,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:37:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:15,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:15,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090448627] [2023-02-18 01:37:15,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:15,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270261161] [2023-02-18 01:37:15,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270261161] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:37:15,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:37:15,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-02-18 01:37:15,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928664376] [2023-02-18 01:37:15,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:37:15,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 01:37:15,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:15,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 01:37:15,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-18 01:37:15,786 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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 01:37:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:15,852 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2023-02-18 01:37:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 01:37:15,853 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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 14 [2023-02-18 01:37:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:15,853 INFO L225 Difference]: With dead ends: 72 [2023-02-18 01:37:15,853 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 01:37:15,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-02-18 01:37:15,854 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:15,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 104 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:37:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 01:37:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2023-02-18 01:37:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 51 states have internal predecessors, (65), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:37:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2023-02-18 01:37:15,871 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 14 [2023-02-18 01:37:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:15,871 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2023-02-18 01:37:15,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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 01:37:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2023-02-18 01:37:15,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 01:37:15,872 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:15,872 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:15,877 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 01:37:16,076 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 01:37:16,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:16,077 INFO L85 PathProgramCache]: Analyzing trace with hash -789974339, now seen corresponding path program 1 times [2023-02-18 01:37:16,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:16,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028750025] [2023-02-18 01:37:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:16,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:16,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:16,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482185438] [2023-02-18 01:37:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:16,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:16,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:16,086 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 01:37:16,088 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 01:37:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 01:37:16,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:16,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:37:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:16,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:16,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028750025] [2023-02-18 01:37:16,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:16,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482185438] [2023-02-18 01:37:16,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482185438] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 01:37:16,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:37:16,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-02-18 01:37:16,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280109184] [2023-02-18 01:37:16,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:37:16,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 01:37:16,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:16,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 01:37:16,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-02-18 01:37:16,246 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 01:37:18,290 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 01:37:20,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-18 01:37:22,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-18 01:37:24,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-18 01:37:26,331 WARN L539 Checker$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 01:37:28,335 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 01:37:29,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:29,234 INFO L93 Difference]: Finished difference Result 108 states and 137 transitions. [2023-02-18 01:37:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 01:37:29,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 14 [2023-02-18 01:37:29,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:29,237 INFO L225 Difference]: With dead ends: 108 [2023-02-18 01:37:29,237 INFO L226 Difference]: Without dead ends: 106 [2023-02-18 01:37:29,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-02-18 01:37:29,238 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:29,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 6 Unknown, 0 Unchecked, 13.0s Time] [2023-02-18 01:37:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-18 01:37:29,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2023-02-18 01:37:29,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 71 states have internal predecessors, (83), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 01:37:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2023-02-18 01:37:29,257 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 14 [2023-02-18 01:37:29,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:29,258 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2023-02-18 01:37:29,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 01:37:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2023-02-18 01:37:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 01:37:29,260 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:29,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:29,267 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 01:37:29,467 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 01:37:29,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:29,468 INFO L85 PathProgramCache]: Analyzing trace with hash -339337867, now seen corresponding path program 1 times [2023-02-18 01:37:29,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:29,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773390324] [2023-02-18 01:37:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:29,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:29,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:29,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533667143] [2023-02-18 01:37:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:29,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:29,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:29,476 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 01:37:29,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 01:37:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:29,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 01:37:29,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 01:37:29,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:37:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 01:37:29,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:29,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773390324] [2023-02-18 01:37:29,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:29,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533667143] [2023-02-18 01:37:29,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533667143] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:37:29,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:37:29,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-02-18 01:37:29,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198017737] [2023-02-18 01:37:29,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:37:29,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 01:37:29,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:29,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 01:37:29,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-18 01:37:29,595 INFO L87 Difference]: Start difference. First operand 83 states and 100 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 01:37:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:29,793 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2023-02-18 01:37:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 01:37:29,794 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 20 [2023-02-18 01:37:29,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:29,795 INFO L225 Difference]: With dead ends: 98 [2023-02-18 01:37:29,795 INFO L226 Difference]: Without dead ends: 81 [2023-02-18 01:37:29,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-18 01:37:29,796 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:29,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 47 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 01:37:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-18 01:37:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-18 01:37:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 69 states have internal predecessors, (80), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 01:37:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2023-02-18 01:37:29,808 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 20 [2023-02-18 01:37:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:29,808 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2023-02-18 01:37:29,808 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 01:37:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2023-02-18 01:37:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 01:37:29,809 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:29,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:29,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 01:37:30,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-18 01:37:30,015 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2118336314, now seen corresponding path program 1 times [2023-02-18 01:37:30,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:30,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160918147] [2023-02-18 01:37:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:30,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:30,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:30,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811104157] [2023-02-18 01:37:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:30,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:30,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:30,036 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:37:30,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 01:37:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:30,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 01:37:30,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:30,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:37:30,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:30,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160918147] [2023-02-18 01:37:30,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:30,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811104157] [2023-02-18 01:37:30,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811104157] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:37:30,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:37:30,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 01:37:30,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967631496] [2023-02-18 01:37:30,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:37:30,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 01:37:30,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:30,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 01:37:30,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 01:37:30,084 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 01:37:30,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:30,099 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2023-02-18 01:37:30,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 01:37:30,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 20 [2023-02-18 01:37:30,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:30,100 INFO L225 Difference]: With dead ends: 106 [2023-02-18 01:37:30,100 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 01:37:30,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 01:37:30,101 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:30,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:37:30,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 01:37:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-18 01:37:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 56 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 01:37:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2023-02-18 01:37:30,109 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 20 [2023-02-18 01:37:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:30,109 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2023-02-18 01:37:30,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 01:37:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2023-02-18 01:37:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 01:37:30,110 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:30,110 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:30,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 01:37:30,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:30,315 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:30,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2021496606, now seen corresponding path program 2 times [2023-02-18 01:37:30,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:30,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535315354] [2023-02-18 01:37:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:30,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:30,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:30,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963148285] [2023-02-18 01:37:30,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 01:37:30,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:30,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:30,325 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:37:30,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-18 01:37:30,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:37:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 01:37:30,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:30,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 01:37:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 01:37:30,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:37:30,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:37:30,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535315354] [2023-02-18 01:37:30,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:37:30,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963148285] [2023-02-18 01:37:30,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963148285] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:37:30,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:37:30,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 01:37:30,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485893139] [2023-02-18 01:37:30,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:37:30,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 01:37:30,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:37:30,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 01:37:30,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 01:37:30,374 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 01:37:30,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:37:30,550 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2023-02-18 01:37:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 01:37:30,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 22 [2023-02-18 01:37:30,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:37:30,551 INFO L225 Difference]: With dead ends: 88 [2023-02-18 01:37:30,551 INFO L226 Difference]: Without dead ends: 85 [2023-02-18 01:37:30,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 01:37:30,551 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:37:30,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 01:37:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-18 01:37:30,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2023-02-18 01:37:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 55 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 01:37:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2023-02-18 01:37:30,559 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 22 [2023-02-18 01:37:30,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:37:30,559 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2023-02-18 01:37:30,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 01:37:30,560 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2023-02-18 01:37:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 01:37:30,560 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:37:30,560 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:37:30,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 01:37:30,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 01:37:30,765 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:37:30,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:37:30,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1149777120, now seen corresponding path program 1 times [2023-02-18 01:37:30,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:37:30,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113329089] [2023-02-18 01:37:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:30,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:37:30,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:37:30,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948896041] [2023-02-18 01:37:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:37:30,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:37:30,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:37:30,781 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:37:30,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 01:37:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:37:30,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 01:37:30,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:37:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 01:37:30,895 INFO L328 TraceCheckSpWp]: Computing backward predicates...