./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 082e5acb2a505af9e43ec1a894890509a127a32d8ecd4c5193a456bddcb0f4a3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:02:43,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:02:43,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:02:43,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:02:43,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:02:43,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:02:43,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:02:43,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:02:43,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:02:43,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:02:43,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:02:43,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:02:43,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:02:43,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:02:43,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:02:43,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:02:43,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:02:43,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:02:43,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:02:43,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:02:43,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:02:43,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:02:43,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:02:43,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:02:43,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:02:43,116 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:02:43,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:02:43,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:02:43,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:02:43,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:02:43,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:02:43,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:02:43,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:02:43,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:02:43,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:02:43,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:02:43,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:02:43,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:02:43,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:02:43,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:02:43,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:02:43,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 21:02:43,146 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:02:43,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:02:43,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:02:43,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:02:43,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:02:43,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:02:43,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:02:43,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:02:43,149 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:02:43,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:02:43,149 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:02:43,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:02:43,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:02:43,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:02:43,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 21:02:43,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:02:43,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 21:02:43,150 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:02:43,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 21:02:43,151 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:02:43,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 21:02:43,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:02:43,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:02:43,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:02:43,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:02:43,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:02:43,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:02:43,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 21:02:43,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:02:43,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:02:43,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:02:43,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 21:02:43,153 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:02:43,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:02:43,153 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:02:43,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 082e5acb2a505af9e43ec1a894890509a127a32d8ecd4c5193a456bddcb0f4a3 [2023-02-15 21:02:43,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:02:43,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:02:43,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:02:43,362 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:02:43,362 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:02:43,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2023-02-15 21:02:44,372 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:02:44,523 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:02:44,524 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2023-02-15 21:02:44,529 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43b7e05c9/fd227c39a6fe4829b590c1eb7e6716ba/FLAG45e485d67 [2023-02-15 21:02:44,539 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43b7e05c9/fd227c39a6fe4829b590c1eb7e6716ba [2023-02-15 21:02:44,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:02:44,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:02:44,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:02:44,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:02:44,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:02:44,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3877b05c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44, skipping insertion in model container [2023-02-15 21:02:44,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:02:44,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:02:44,666 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c[537,550] [2023-02-15 21:02:44,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:02:44,684 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:02:44,692 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c[537,550] [2023-02-15 21:02:44,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:02:44,705 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:02:44,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44 WrapperNode [2023-02-15 21:02:44,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:02:44,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:02:44,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:02:44,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:02:44,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,727 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-15 21:02:44,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:02:44,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:02:44,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:02:44,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:02:44,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,743 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:02:44,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:02:44,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:02:44,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:02:44,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44" (1/1) ... [2023-02-15 21:02:44,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:02:44,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:02:44,772 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) [2023-02-15 21:02:44,780 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 [2023-02-15 21:02:44,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:02:44,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:02:44,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:02:44,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:02:44,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 21:02:44,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 21:02:44,880 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:02:44,881 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:02:45,044 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:02:45,048 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:02:45,048 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 21:02:45,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:02:45 BoogieIcfgContainer [2023-02-15 21:02:45,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:02:45,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:02:45,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:02:45,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:02:45,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:02:44" (1/3) ... [2023-02-15 21:02:45,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4015e82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:02:45, skipping insertion in model container [2023-02-15 21:02:45,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:02:44" (2/3) ... [2023-02-15 21:02:45,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4015e82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:02:45, skipping insertion in model container [2023-02-15 21:02:45,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:02:45" (3/3) ... [2023-02-15 21:02:45,055 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound5.c [2023-02-15 21:02:45,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:02:45,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 21:02:45,137 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:02:45,141 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;@ef54000, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:02:45,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 21:02:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:02:45,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 21:02:45,150 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:02:45,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:02:45,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:02:45,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:02:45,157 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2023-02-15 21:02:45,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:02:45,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128928810] [2023-02-15 21:02:45,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:02:45,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:02:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:02:45,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:02:45,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128928810] [2023-02-15 21:02:45,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 21:02:45,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074983968] [2023-02-15 21:02:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:02:45,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:02:45,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:02:45,281 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) [2023-02-15 21:02:45,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 21:02:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:02:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 21:02:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:02:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:02:45,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:02:45,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074983968] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:02:45,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:02:45,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 21:02:45,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958054756] [2023-02-15 21:02:45,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:02:45,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 21:02:45,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:02:45,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 21:02:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 21:02:45,363 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:02:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:02:45,386 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2023-02-15 21:02:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 21:02:45,389 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 21:02:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:02:45,396 INFO L225 Difference]: With dead ends: 53 [2023-02-15 21:02:45,396 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 21:02:45,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 21:02:45,403 INFO L413 NwaCegarLoop]: 38 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, 38 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 [2023-02-15 21:02:45,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:02:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 21:02:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-15 21:02:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:02:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2023-02-15 21:02:45,436 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2023-02-15 21:02:45,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:02:45,437 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2023-02-15 21:02:45,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:02:45,437 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2023-02-15 21:02:45,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 21:02:45,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:02:45,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:02:45,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 21:02:45,643 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 [2023-02-15 21:02:45,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:02:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:02:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2023-02-15 21:02:45,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:02:45,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221837993] [2023-02-15 21:02:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:02:45,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:02:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:02:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:02:45,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:02:45,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221837993] [2023-02-15 21:02:45,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221837993] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:02:45,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:02:45,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:02:45,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212018708] [2023-02-15 21:02:45,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:02:45,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:02:45,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:02:45,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:02:45,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:02:45,853 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2023-02-15 21:02:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:02:45,896 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2023-02-15 21:02:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:02:45,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2023-02-15 21:02:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:02:45,898 INFO L225 Difference]: With dead ends: 38 [2023-02-15 21:02:45,898 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 21:02:45,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:02:45,900 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:02:45,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:02:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 21:02:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2023-02-15 21:02:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:02:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-15 21:02:45,910 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-15 21:02:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:02:45,911 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-15 21:02:45,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2023-02-15 21:02:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-15 21:02:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 21:02:45,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:02:45,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:02:45,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 21:02:45,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:02:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:02:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2023-02-15 21:02:45,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:02:45,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131455513] [2023-02-15 21:02:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:02:45,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:02:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:02:45,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:02:45,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131455513] [2023-02-15 21:02:45,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 21:02:45,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017123583] [2023-02-15 21:02:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:02:45,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:02:45,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:02:45,926 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) [2023-02-15 21:02:45,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 21:02:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:02:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 21:02:45,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:02:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:02:45,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:02:45,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017123583] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:02:45,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:02:45,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:02:45,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202292184] [2023-02-15 21:02:45,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:02:45,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:02:45,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:02:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:02:45,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:02:45,987 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2023-02-15 21:02:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:02:45,997 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2023-02-15 21:02:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:02:45,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 12 [2023-02-15 21:02:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:02:45,998 INFO L225 Difference]: With dead ends: 44 [2023-02-15 21:02:45,998 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 21:02:45,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:02:45,999 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 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 [2023-02-15 21:02:45,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:02:46,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 21:02:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-15 21:02:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:02:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-15 21:02:46,004 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2023-02-15 21:02:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:02:46,004 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-15 21:02:46,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2023-02-15 21:02:46,004 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-15 21:02:46,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 21:02:46,005 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:02:46,005 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:02:46,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 21:02:46,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 21:02:46,209 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:02:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:02:46,210 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2023-02-15 21:02:46,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:02:46,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906167710] [2023-02-15 21:02:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:02:46,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:02:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:02:46,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 21:02:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:02:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:02:46,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:02:46,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906167710] [2023-02-15 21:02:46,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906167710] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:02:46,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:02:46,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:02:46,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416149678] [2023-02-15 21:02:46,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:02:46,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:02:46,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:02:46,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:02:46,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:02:46,315 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 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) [2023-02-15 21:02:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:02:46,347 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2023-02-15 21:02:46,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:02:46,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 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 15 [2023-02-15 21:02:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:02:46,349 INFO L225 Difference]: With dead ends: 44 [2023-02-15 21:02:46,349 INFO L226 Difference]: Without dead ends: 42 [2023-02-15 21:02:46,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:02:46,350 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 13 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:02:46,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 102 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:02:46,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-15 21:02:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2023-02-15 21:02:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 21:02:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-15 21:02:46,355 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2023-02-15 21:02:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:02:46,355 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-15 21:02:46,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 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) [2023-02-15 21:02:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-15 21:02:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 21:02:46,356 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:02:46,356 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:02:46,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 21:02:46,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:02:46,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:02:46,357 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2023-02-15 21:02:46,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:02:46,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400033088] [2023-02-15 21:02:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:02:46,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:02:46,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:02:46,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139240086] [2023-02-15 21:02:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:02:46,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:02:46,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:02:46,365 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) [2023-02-15 21:02:46,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 21:02:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:02:46,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 21:02:46,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:02:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:02:46,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:02:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:02:48,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:02:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400033088] [2023-02-15 21:02:48,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:02:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139240086] [2023-02-15 21:02:48,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139240086] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:02:48,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:02:48,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-02-15 21:02:48,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576370334] [2023-02-15 21:02:48,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:02:48,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:02:48,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:02:48,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:02:48,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:02:48,329 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:02:50,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:02:52,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:02:53,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:02:56,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:02:58,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:02:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:02:59,224 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2023-02-15 21:02:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:02:59,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2023-02-15 21:02:59,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:02:59,226 INFO L225 Difference]: With dead ends: 78 [2023-02-15 21:02:59,226 INFO L226 Difference]: Without dead ends: 63 [2023-02-15 21:02:59,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-02-15 21:02:59,227 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 92 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 81 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:02:59,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 86 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 177 Invalid, 4 Unknown, 0 Unchecked, 10.6s Time] [2023-02-15 21:02:59,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-15 21:02:59,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-02-15 21:02:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 states have internal predecessors, (47), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-15 21:02:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2023-02-15 21:02:59,236 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 20 [2023-02-15 21:02:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:02:59,237 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2023-02-15 21:02:59,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:02:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2023-02-15 21:02:59,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 21:02:59,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:02:59,238 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:02:59,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 21:02:59,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:02:59,442 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:02:59,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:02:59,443 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2023-02-15 21:02:59,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:02:59,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958272410] [2023-02-15 21:02:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:02:59,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:02:59,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:02:59,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882479389] [2023-02-15 21:02:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:02:59,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:02:59,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:02:59,451 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) [2023-02-15 21:02:59,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 21:02:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:02:59,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 21:02:59,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:02:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:02:59,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:02:59,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:02:59,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958272410] [2023-02-15 21:02:59,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:02:59,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882479389] [2023-02-15 21:02:59,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882479389] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:02:59,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:02:59,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:02:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311823881] [2023-02-15 21:02:59,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:02:59,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:02:59,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:02:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:02:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:02:59,519 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 21:02:59,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:02:59,546 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2023-02-15 21:02:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:02:59,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-15 21:02:59,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:02:59,549 INFO L225 Difference]: With dead ends: 76 [2023-02-15 21:02:59,549 INFO L226 Difference]: Without dead ends: 69 [2023-02-15 21:02:59,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:02:59,551 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:02:59,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 117 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:02:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-15 21:02:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-15 21:02:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 47 states have internal predecessors, (52), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-15 21:02:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2023-02-15 21:02:59,569 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 28 [2023-02-15 21:02:59,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:02:59,570 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2023-02-15 21:02:59,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 21:02:59,570 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2023-02-15 21:02:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 21:02:59,570 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:02:59,571 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:02:59,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 21:02:59,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:02:59,775 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:02:59,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:02:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2023-02-15 21:02:59,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:02:59,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041764953] [2023-02-15 21:02:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:02:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:02:59,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:02:59,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245444756] [2023-02-15 21:02:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:02:59,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:02:59,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:02:59,783 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) [2023-02-15 21:02:59,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 21:02:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:02:59,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 21:02:59,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:02:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:02:59,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:02:59,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:02:59,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041764953] [2023-02-15 21:02:59,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:02:59,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245444756] [2023-02-15 21:02:59,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245444756] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:02:59,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:02:59,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 21:02:59,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512640989] [2023-02-15 21:02:59,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:02:59,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:02:59,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:02:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:02:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:02:59,939 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 21:03:00,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:03:00,376 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2023-02-15 21:03:00,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:03:00,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-15 21:03:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:03:00,377 INFO L225 Difference]: With dead ends: 75 [2023-02-15 21:03:00,377 INFO L226 Difference]: Without dead ends: 63 [2023-02-15 21:03:00,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:03:00,378 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 44 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:03:00,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 107 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:03:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-15 21:03:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-02-15 21:03:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.2) internal successors, (48), 43 states have internal predecessors, (48), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 21:03:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2023-02-15 21:03:00,385 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 28 [2023-02-15 21:03:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:03:00,385 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2023-02-15 21:03:00,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 21:03:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2023-02-15 21:03:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 21:03:00,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:03:00,386 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:03:00,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 21:03:00,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:00,590 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:03:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:03:00,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1040101153, now seen corresponding path program 1 times [2023-02-15 21:03:00,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:03:00,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540541538] [2023-02-15 21:03:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:00,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:03:00,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:03:00,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929873125] [2023-02-15 21:03:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:00,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:00,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:03:00,622 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) [2023-02-15 21:03:00,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 21:03:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:00,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 21:03:00,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:03:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:03:00,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:03:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:03:00,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:03:00,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540541538] [2023-02-15 21:03:00,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:03:00,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929873125] [2023-02-15 21:03:00,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929873125] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:03:00,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:03:00,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-15 21:03:00,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552781435] [2023-02-15 21:03:00,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:03:00,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:03:00,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:03:00,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:03:00,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:03:00,726 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 21:03:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:03:00,799 INFO L93 Difference]: Finished difference Result 134 states and 161 transitions. [2023-02-15 21:03:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:03:00,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2023-02-15 21:03:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:03:00,800 INFO L225 Difference]: With dead ends: 134 [2023-02-15 21:03:00,800 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 21:03:00,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:03:00,801 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 34 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:03:00,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 155 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:03:00,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 21:03:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2023-02-15 21:03:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 73 states have internal predecessors, (82), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-15 21:03:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2023-02-15 21:03:00,819 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 30 [2023-02-15 21:03:00,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:03:00,820 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2023-02-15 21:03:00,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 21:03:00,820 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2023-02-15 21:03:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 21:03:00,823 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:03:00,824 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:03:00,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 21:03:01,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:01,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:03:01,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:03:01,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2101649637, now seen corresponding path program 1 times [2023-02-15 21:03:01,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:03:01,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306421850] [2023-02-15 21:03:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:01,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:03:01,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:03:01,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906789092] [2023-02-15 21:03:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:01,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:01,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:03:01,032 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) [2023-02-15 21:03:01,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 21:03:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:01,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 21:03:01,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:03:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 21:03:01,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:03:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 21:03:01,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:03:01,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306421850] [2023-02-15 21:03:01,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:03:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906789092] [2023-02-15 21:03:01,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906789092] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:03:01,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:03:01,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2023-02-15 21:03:01,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136976248] [2023-02-15 21:03:01,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:03:01,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 21:03:01,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:03:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 21:03:01,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:03:01,207 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 21:03:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:03:01,308 INFO L93 Difference]: Finished difference Result 163 states and 192 transitions. [2023-02-15 21:03:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:03:01,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2023-02-15 21:03:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:03:01,309 INFO L225 Difference]: With dead ends: 163 [2023-02-15 21:03:01,309 INFO L226 Difference]: Without dead ends: 149 [2023-02-15 21:03:01,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:03:01,310 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 43 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:03:01,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 242 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:03:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-15 21:03:01,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 144. [2023-02-15 21:03:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 99 states have internal predecessors, (110), 31 states have call successors, (31), 18 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2023-02-15 21:03:01,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 169 transitions. [2023-02-15 21:03:01,321 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 169 transitions. Word has length 46 [2023-02-15 21:03:01,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:03:01,321 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 169 transitions. [2023-02-15 21:03:01,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 21:03:01,321 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 169 transitions. [2023-02-15 21:03:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 21:03:01,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:03:01,322 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:03:01,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 21:03:01,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:01,526 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:03:01,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:03:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2103377515, now seen corresponding path program 1 times [2023-02-15 21:03:01,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:03:01,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251317340] [2023-02-15 21:03:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:01,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:03:01,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:03:01,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006387282] [2023-02-15 21:03:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:01,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:01,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:03:01,533 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) [2023-02-15 21:03:01,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 21:03:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:01,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 21:03:01,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:03:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 21:03:01,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:03:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 21:03:04,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:03:04,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251317340] [2023-02-15 21:03:04,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:03:04,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006387282] [2023-02-15 21:03:04,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006387282] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:03:04,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:03:04,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2023-02-15 21:03:04,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867088801] [2023-02-15 21:03:04,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:03:04,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 21:03:04,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:03:04,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 21:03:04,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=166, Unknown=1, NotChecked=0, Total=210 [2023-02-15 21:03:05,000 INFO L87 Difference]: Start difference. First operand 144 states and 169 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-15 21:03:07,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:03:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:03:08,509 INFO L93 Difference]: Finished difference Result 183 states and 221 transitions. [2023-02-15 21:03:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:03:08,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 46 [2023-02-15 21:03:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:03:08,511 INFO L225 Difference]: With dead ends: 183 [2023-02-15 21:03:08,511 INFO L226 Difference]: Without dead ends: 181 [2023-02-15 21:03:08,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=90, Invalid=329, Unknown=1, NotChecked=0, Total=420 [2023-02-15 21:03:08,511 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:03:08,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 122 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 267 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2023-02-15 21:03:08,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-15 21:03:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2023-02-15 21:03:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 117 states have (on average 1.188034188034188) internal successors, (139), 125 states have internal predecessors, (139), 38 states have call successors, (38), 21 states have call predecessors, (38), 21 states have return successors, (35), 30 states have call predecessors, (35), 35 states have call successors, (35) [2023-02-15 21:03:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 212 transitions. [2023-02-15 21:03:08,529 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 212 transitions. Word has length 46 [2023-02-15 21:03:08,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:03:08,530 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 212 transitions. [2023-02-15 21:03:08,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-15 21:03:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 212 transitions. [2023-02-15 21:03:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 21:03:08,533 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:03:08,533 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 21:03:08,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 21:03:08,739 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,SelfDestructingSolverStorable9 [2023-02-15 21:03:08,740 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:03:08,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:03:08,741 INFO L85 PathProgramCache]: Analyzing trace with hash -246714477, now seen corresponding path program 1 times [2023-02-15 21:03:08,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:03:08,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083533068] [2023-02-15 21:03:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:08,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:03:08,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:03:08,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748635270] [2023-02-15 21:03:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:08,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:08,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:03:08,773 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) [2023-02-15 21:03:08,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 21:03:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:08,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 21:03:08,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:03:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 29 proven. 39 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-15 21:03:09,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:03:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-02-15 21:03:09,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:03:09,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083533068] [2023-02-15 21:03:09,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:03:09,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748635270] [2023-02-15 21:03:09,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748635270] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:03:09,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:03:09,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-02-15 21:03:09,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407502880] [2023-02-15 21:03:09,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:03:09,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:03:09,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:03:09,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:03:09,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:03:09,375 INFO L87 Difference]: Start difference. First operand 177 states and 212 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-15 21:03:11,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:03:13,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:03:20,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:03:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:03:20,395 INFO L93 Difference]: Finished difference Result 222 states and 266 transitions. [2023-02-15 21:03:20,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:03:20,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 56 [2023-02-15 21:03:20,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:03:20,397 INFO L225 Difference]: With dead ends: 222 [2023-02-15 21:03:20,397 INFO L226 Difference]: Without dead ends: 200 [2023-02-15 21:03:20,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-02-15 21:03:20,397 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:03:20,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 146 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 291 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2023-02-15 21:03:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-15 21:03:20,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 188. [2023-02-15 21:03:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 126 states have (on average 1.1666666666666667) internal successors, (147), 133 states have internal predecessors, (147), 38 states have call successors, (38), 23 states have call predecessors, (38), 23 states have return successors, (36), 31 states have call predecessors, (36), 36 states have call successors, (36) [2023-02-15 21:03:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 221 transitions. [2023-02-15 21:03:20,413 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 221 transitions. Word has length 56 [2023-02-15 21:03:20,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:03:20,413 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 221 transitions. [2023-02-15 21:03:20,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-15 21:03:20,413 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 221 transitions. [2023-02-15 21:03:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 21:03:20,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:03:20,414 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:03:20,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 21:03:20,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:20,615 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:03:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:03:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash 98519191, now seen corresponding path program 1 times [2023-02-15 21:03:20,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:03:20,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182739943] [2023-02-15 21:03:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:20,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:03:20,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 21:03:20,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241823701] [2023-02-15 21:03:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:03:20,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:03:20,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:03:20,623 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) [2023-02-15 21:03:20,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 21:03:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:03:20,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 21:03:20,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:03:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 35 proven. 26 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-15 21:03:21,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:03:59,740 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~p~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~d~0#1| 4294967296))) (or (not (= .cse0 (mod (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) 4294967296))) (= (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 (div .cse0 2)) |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~B~0#1| (div .cse1 2))) 4294967296)) (= 1 .cse1) (<= .cse0 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)))) is different from true [2023-02-15 21:05:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 35 proven. 20 refuted. 0 times theorem prover too weak. 76 trivial. 6 not checked. [2023-02-15 21:05:52,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:05:52,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182739943] [2023-02-15 21:05:52,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 21:05:52,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241823701] [2023-02-15 21:05:52,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241823701] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:05:52,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:05:52,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2023-02-15 21:05:52,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637148571] [2023-02-15 21:05:52,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:05:52,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 21:05:52,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:05:52,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 21:05:52,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=334, Unknown=14, NotChecked=38, Total=462 [2023-02-15 21:05:52,459 INFO L87 Difference]: Start difference. First operand 188 states and 221 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 19 states have internal predecessors, (44), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2023-02-15 21:05:54,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:05:56,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:00,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:06,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:08,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:27,679 WARN L233 SmtUtils]: Spent 10.33s on a formula simplification. DAG size of input: 63 DAG size of output: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:06:31,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:36,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:39,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:43,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:45,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:47,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:06:49,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:19,145 WARN L233 SmtUtils]: Spent 23.56s on a formula simplification. DAG size of input: 47 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 21:07:22,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:25,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:28,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 21:07:30,253 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 []